Articles de revues : « Seismic performance-based assessment »

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Macedo, Jorge, Jonathan Bray, Norman Abrahamson et Thaleia Travasarou. « Performance-Based Probabilistic Seismic Slope Displacement Procedure ». Earthquake Spectra 34, n^o 2 (mai 2018) : 673–95. http://dx.doi.org/10.1193/122516eqs251m.

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Engineers often use simplified seismic slope displacement procedures to evaluate the seismic performance of earth structures and natural slopes. Current state of practice procedures typically separate the estimation of the ground motion intensity measure ( IM) from the estimate of seismic displacement ( D), given the selected IM hazard level. Thus D is estimated based on a single IM value. A straightforward performance-based seismic slope assessment procedure is proposed, which considers the full range of potential IM values to estimate seismic slope displacements directly related to a hazard level. Seismic performance is assessed through either a Newmark-type seismic displacement estimate or a calibrated seismic coefficient that can be used in pseudostatic slope stability analyses. The procedures were developed for a wide range of earth systems for shallow crustal earthquakes and subduction zone earthquakes. Currently employed simplified slope displacement procedures do not provide consistent assessments of the actual seismic slope displacement hazard. The proposed procedures can be readily used in practice to perform rigorous performance-based seismic slope displacement hazard assessments.

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Simões, Ana, Rita Bento, Serena Cattari et Sergio Lagomarsino. « Seismic performance-based assessment of “Gaioleiro” buildings ». Engineering Structures 80 (décembre 2014) : 486–500. http://dx.doi.org/10.1016/j.engstruct.2014.09.025.

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Bray, Jonathan D., et Jorge Macedo. « Performance-based seismic assessment of slope systems ». Soil Dynamics and Earthquake Engineering 168 (mai 2023) : 107835. http://dx.doi.org/10.1016/j.soildyn.2023.107835.

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Priestley, M. J. N. « Performance based seismic design ». Bulletin of the New Zealand Society for Earthquake Engineering 33, n^o 3 (30 septembre 2000) : 325–46. http://dx.doi.org/10.5459/bnzsee.33.3.325-346.

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One of the major developments in seismic design over the past 10 years has been increased emphasis on limit states design, now generally termed Performance Based Engineering. Three techniques - the capacity spectrum approach, the N2 method and direct displacement-based design have now matured to the stage where seismic assessment of existing structures, or design of new structures can be carried out to ensure that particular deformation-based criteria are met. The paper will outline and compare the three methods, and discuss them in the context of traditional force-based seismic design and earlier design approaches which contained some elements of performance based design. Factors defining different performance states will be discussed, including the need, not yet achieved, to include residual displacement as a key performance limit. Some emphasis will be placed on soil-related problems, and the incorporation of soil/structure interaction into performance-based design. It will be shown that this is relatively straightforward and results in consistent design solutions not readily available with force-based designs using force-reduction factors.

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Basaglia, Alberto, Alessandra Aprile, Enrico Spacone et Francesco Pilla. « Performance-based Seismic Risk Assessment of Urban Systems ». International Journal of Architectural Heritage 12, n^o 7-8 (17 août 2018) : 1131–49. http://dx.doi.org/10.1080/15583058.2018.1503371.

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Li, Hao, et Hua Zhang. « Bayesian Network Based Expert System for Seismic Performance Assessment ». Advanced Materials Research 655-657 (janvier 2013) : 1718–21. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.1718.

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In this paper, Bayesian network based expert system is built for seismic performance evaluation. Unlike the regular rule-based expert system which allows only unidirectional reasoning with strict complete data entry sets, the Bayesian network based expert system can perform bidirectional inference based on incomplete information when the prior probability distributions are given. Seismic performance evaluation is a task that often needs experiences to draw a conclusion under insufficient information circumstance, which made the Bayesian network- based expert system well qualified for the job, and the example also illustrates this point.

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Fadel Miguel, Leandro F., Fabio Alminhana et André T. Beck. « Performance based assessment of transmission lines to seismic events ». Engineering Structures 249 (décembre 2021) : 113298. http://dx.doi.org/10.1016/j.engstruct.2021.113298.

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Bantilas, Kosmas E., Ioannis E. Kavvadias, Magdalini Tyrtaiou et Anaxagoras Elenas. « Hilbert–Huang-Transform-Based Seismic Intensity Measures for Rocking Response Assessment ». Applied Sciences 13, n^o 3 (27 janvier 2023) : 1634. http://dx.doi.org/10.3390/app13031634.

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Structures that can uplift and rock under severe seismic excitations present remarkable stability without exhibiting damage. As such, rocking-response-based structural systems constitute a promising design practice. Due to the high nonlinearity of the rocking response, the seismic performance of this class of structures should be evaluated probabilistically. From this point of view, in the present study, the performance of 12 novel HHT-based intensity measures (IMs) in describing the seismic behavior of typical rocking viaducts was assessed based on optimal IM selection criteria. To this end, a comparative evaluation of the performance between the proposed and 26 well-known conventional IMs was presented. Moreover, bivariate IMs were also considered, and seismic fragilities were provided. Finally, the classification of the seismic response was conducted using discriminant analysis, resulting in a reliable and rapid estimation of the maximum seismic demand. Based on the results, it is evident that HHT-based IMs result in an enhanced estimation of the seismic performance of the examined structural system.

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Ismail, Rozaina, Nurul Damia Sukati, Nurul Nabilah Moktar, Ainnur Zulsyamilatil Huda Abd Halim, Dayang Nur Erliyani Fitri Erwan, Azmi Ibrahim, Norliyati Mohd Amin, Azlan Adnan et Ade Faisal. « Seismic Performance Assessment of Murum Dam Under Various Seismic Event ». Journal of Mechanical Engineering 20, n^o 1 (15 janvier 2023) : 135–48. http://dx.doi.org/10.24191/jmeche.v20i1.21083.

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Dams are considered as vital assets for countries; therefore, the dam must be built to withstand natural disasters. However, the performance of the dam structure comes to attention since the Ranau earthquake occurrence in 2015 is the strongest earthquake recorded in Malaysia. The behavior of the dam became deteriorated across the year due to earthquake motion which caused damage to the dam. This study aims to assess the performance of Murum dam using Incremental Dynamic Analysis (IDA) which subjected was subjected to a set of 6 ground motion records scaled to increasing intensity levels by using ABAQUS. A different scale Peak Ground Acceleration (PGA) of 0.05 g, 0.10 g, 0.15 g, 0.20 g, and 0.30 g were applied in this study. Based on the results, the cracking area increases when the acceleration increases due to the high tensile stress. The maximum displacement value was located at the crest part of the dam. The findings revealed that the concentration of stresses in the dam body, especially heel and neck. The maximum normal stress was found at the heel zone of the dam. The trend of maximum shear stress shows a fluctuated value when the scale PGA increased. This showed that the performance level of the dam based on seismic loadings depend on ground motion pattern.

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Elmrabet, Oumnia, Hasnae Boubel, El Mehdi Echebba, Mohamed Rougui et Ouadia Mouhat. « Performance-based seismic assessment of vulnerability of dam using time history analysis ». MATEC Web of Conferences 149 (2018) : 02035. http://dx.doi.org/10.1051/matecconf/201814902035.

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The current performance-based seismic assessment procedure can be computationally intensive as it requires many time history analyses (THA) each requiring time intensive post-processing of results. Time history analysis is a part of structural analysis and is the calculation of the response of a structure to any earthquake. It is one of the main processes of structural design in regions where earthquakes are prevalent. The objective of this study is to evaluate the seismic performance of embankment dam located on the Oued RHISS in the Province of AL HOCEIMA using the THA method. To monitor structural behavior, the seismic vulnerability of structure is evaluated under real earthquake records with considering the soil-structure-fluide interaction. In this study, a simple assistant program is developed for implementing earthquake analyses of structure with ANSYS, ground acceleration–time history data are used for seismic analysis and dynamic numerical simulations were conducted to study and identify the total response of the soil-structure system.

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Giordano, Nicola, Khalid M. Mosalam et Selim Günay. « Probabilistic performance-based seismic assessment of an existing masonry building ». Earthquake Spectra 36, n^o 1 (28 novembre 2019) : 271–98. http://dx.doi.org/10.1177/8755293019878191.

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Existing unreinforced masonry (URM) buildings represent a significant part of the constructed facilities. Unfortunately, in case of seismic actions, their structural behavior is negatively affected by the low capacity of masonry components to withstand lateral forces. For this reason, in the past decades, URM buildings have been responsible for fatalities and large economic losses even in the case of moderate earthquakes. This article presents the seismic loss assessment of an old masonry building damaged during the 2014 South Napa earthquake using the framework of the Pacific Earthquake Engineering Research Center’s Performance-Based Earthquake Engineering. For this purpose, the performance is expressed in terms of expected monetary loss curves for different hazard scenarios. Structural and non-structural losses are considered in the analysis using a practical, yet accurate, structural idealization of the URM building, which is validated by the observed damage from the 2014 South Napa earthquake.

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A. Whittaker, Y. N. Huang et R. O. Hamburger. « Next-generation performance based earthquake engineering* ». Electronic Journal of Structural Engineering, n^o 2 (1 décembre 2007) : 49–57. http://dx.doi.org/10.56748/ejse.812.

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The next-generation tools and procedures for performance-based earthquake engineering that are being developed in the United States represent a radical departure from traditional seismic design practice and performance assessment. Performance will be measured in terms of direct economic loss, indirect economic loss and casualties rather than by building component deformations and accelerations. Uncertainty and randomness will be captured in every step of the performance assessment process. The paper summarizes the types of performance assessment made possible by the next-generation tools and procedures and describes each step in the assessment process. Fragility functions, damage states and consequence functions, which are key elements in the next generation procedures, are introduced.

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Sheikh, M. Neaz, et Frédéric Légeron. « Performance based seismic assessment of bridges designed according to Canadian Highway Bridge Design Code ». Canadian Journal of Civil Engineering 41, n^o 9 (septembre 2014) : 777–87. http://dx.doi.org/10.1139/cjce-2013-0025.

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Recent research efforts have focused on the development of performance based seismic design methodologies for structures. However, the seismic design rules prescribed in the current Canadian Highway Bridge Design Code (CHBDC) is based largely on force based design principles. Although a set of performance requirements (performance objectives) for different return period earthquake events have been specified, there is no explicit requirement in the CHBDC to check the attainment of such performance objectives for the designed bridges. Also, no engineering parameters have been assigned to the specified performance objectives. This paper correlates seismic performance objectives (both qualitative and quantitative) with engineering parameters, based on the data collected from published experimental investigations and field investigation reports of recent earthquakes. A simple method has been developed and validated with experimental results for assessing the performance of bridges designed according to CHBDC. It has been found that the design rules prescribed in CHBDC do not guarantee that specified multiple seismic performance objectives can be achieved. An implicit seismic design rule in the form of performance response modification factor has been outlined for the performance based seismic design of bridges.

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KOIKE, Takeshi, Nobuhiro HASEGAWA, Masahiro HAMANO et Taku WATANABE. « PERFORMANCE-BASED SEISMIC SAFETY ASSESSMENT METHOD OF WATER NETWORK SYSTEM ». Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & ; Earthquake Engineering (SE/EE)) 78, n^o 4 (2022) : I_22—I_32. http://dx.doi.org/10.2208/jscejseee.78.4_i_22.

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Nguyen, Van-Toan, Jin-Hee Ahn, Achintya Haldar et Jungwon Huh. « Fragility-based seismic performance assessment of modular underground arch bridges ». Structures 39 (mai 2022) : 1218–30. http://dx.doi.org/10.1016/j.istruc.2022.04.005.

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KOIKE, Takeshi, Taku WATANABE, Maahiro HAMANO, Nobuhiro HASEGAWA, Hiromoto ONUMA, Ji DANG et Nobuo NAKAGAWA. « PERFORMANCE-BASED SEISMIC SAFETY ASSESSMENT METHOD FOR ABOVE-GROUND RESERVOIRS ». Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & ; Earthquake Engineering (SE/EE)) 77, n^o 4 (2021) : I_24—I_34. http://dx.doi.org/10.2208/jscejseee.77.4_i_24.

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M. Elmorsy, Medhat, Ahmed A. Ghaleb et Mohamed E. El-Zoughiby. « PERFORMANCE BASED SEISMIC ASSESSMENT OF BUILDINGS WITH CURVED SHEAR WALLS ». Engineering Research Journal 164 (1 décembre 2019) : 178–92. http://dx.doi.org/10.21608/erj.2019.131347.

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Özer, Ekin, et Serdar Soyöz. « Vibration-Based Damage Detection and Seismic Performance Assessment of Bridges ». Earthquake Spectra 31, n^o 1 (février 2015) : 137–57. http://dx.doi.org/10.1193/080612eqs255m.

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This paper proposes a reliability estimation methodology which utilizes system identification results obtained from vibration measurements. A series of earthquake and white noise excitations are imposed to a three-bent reinforced concrete bridge by three-shaking tables, simultaneously. Progressive structural damage is measured and observed, in accordance with increasing intensities of damaging events. Response measurements are obtained by accelerometers located on the deck and the columns of the bridge. Finite element models for non-updated and updated cases were obtained with and without considering acceleration measurements, respectively. Afterwards, damage detection and reliability estimation were carried out for these two cases using fragility curves. Consequently, it is shown that fragility curves of updated models significantly differ from fragility curves of non-updated models. The distinction stems from the difference between stiffness and especially damping parameters of updated and non-updated models. Such difference becomes more prominent at the extreme levels of damage.

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Pang, Rui, Bin Xu, DeGao Zou et XianJing Kong. « Seismic performance assessment of high CFRDs based on fragility analysis ». Science China Technological Sciences 62, n^o 4 (7 septembre 2018) : 635–48. http://dx.doi.org/10.1007/s11431-017-9220-8.

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Hossain, Md Raquibul, Mahmud Ashraf et Jamie E. Padgett. « Risk-based seismic performance assessment of Yielding Shear Panel Device ». Engineering Structures 56 (novembre 2013) : 1570–79. http://dx.doi.org/10.1016/j.engstruct.2013.07.032.

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Ebrahimian, Hossein, Fatemeh Jalayer, Domenico Asprone, Anna M. Lombardi, Warner Marzocchi, Andrea Prota et Gaetano Manfredi. « A performance-based framework for adaptive seismic aftershock risk assessment ». Earthquake Engineering & ; Structural Dynamics 43, n^o 14 (24 juin 2014) : 2179–97. http://dx.doi.org/10.1002/eqe.2444.

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Cakir, Ferit. « Performance-based assessment of long masonry structures ». Challenge Journal of Structural Mechanics 8, n^o 2 (6 juin 2022) : 47. http://dx.doi.org/10.20528/cjsmec.2022.02.002.

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Performance-based assessment (PBA) has become an increasingly important concept for assessing the structural performance of existing structures today. This procedure aims primarily to determine structural damage subject to predetermined load effects and evaluate the state of the building based on the damage obtained. However, because of their complicated engineering characteristics and structural performance, it is very difficult to evaluate the performance of long masonry structures, such as aqueducts, castle ramparts and city walls. The PBA of long masonry structures is extremely challenging because there is no valid approach to assessing their performance. In this study, a practical evaluation method is developed to assess the structural performance of long structures and the seismic performance of Valens Aqueduct, which was constructed by the Roman Empire in Istanbul, is examined using this method.

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Wu, Fangwen, Jingwen Zhou, Yangyang Zhao, Guangqian Wang, Wenlong Tang, Jianfei Luo, Usama Ibrahim et Yuanying Meng. « Performance-Based Seismic Fragility and Risk Assessment of Five-Span Continuous Rigid Frame Bridges ». Advances in Civil Engineering 2021 (8 avril 2021) : 1–15. http://dx.doi.org/10.1155/2021/6657663.

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Earthquakes can cause serious damage to traffic infrastructures, among which the impact on bridge structure is the most important. Therefore, in order to assess bridges serviceability, it is important to master their damage mechanism and to analyze its probability of occurrence under a given seismic action. Various uncertainties, like the location of epicentre of future earthquakes and their magnitudes, make this task quite challenging. We are also required to consider different earthquake scenarios and the damaged states of bridge components associated with those earthquakes. To suppress these difficulties, this study proposed a new method of performance-based seismic fragility and risk assessment for bridges. The proposed method included three steps: (1) performance-based seismic fragility estimation of a five-span continuous rigid frame bridge, (2) seismic hazard analysis for locations of the bridge, and (3) seismic risk analysis of the bridge. The proposed method that considered the performance of the bridge and the uncertainty in the location of the earthquake epicentre and magnitudes can provide valuable references for seismic-resistant design of multispan continuous rigid frame bridges in the future.

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Yao, Xiao Wen, et Jian Qun Jiang. « Study on Deformation-Based Seismic Performance Index of Arch Dams ». Applied Mechanics and Materials 226-228 (novembre 2012) : 1401–5. http://dx.doi.org/10.4028/www.scientific.net/amm.226-228.1401.

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Concrete arch dams are critical structures, the failure of which would lead to catastrophic effects on a regional scale. Considering the uncertainty characteristics of earthquake and the self-adjustment of inner force of arch dams, it’s necessary to investigate the seismic performance index of arch dam for holistically evaluating the seismic safety of arch dam-foundation system subjected to high intensity seismic excitations. By considering the contraction joints movement and concrete material nonlinearity, a series of dynamic response-history analyses of arch dam were carried out under increasing levels of earthquakes. Based on these analyses, the performance index of crest deformation is recommended for the seismic safety assessment of arch dam. And several performance stages of seismic response including the opening of contraction joints and the distribution of concrete damage are also investigated.

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Maffei, Joe, Karl Telleen et Yuki Nakayama. « Probability-Based Seismic Assessment of Buildings, considering Post-Earthquake Safety ». Earthquake Spectra 24, n^o 3 (août 2008) : 667–99. http://dx.doi.org/10.1193/1.2950066.

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Advanced Seismic Assessment Guidelines, developed by researchers at Stanford University and tested by the authors, offer improvement over previous methods for seismic evaluation of buildings where post-earthquake safety is a concern. This probability-based method allows engineers to quantify expected structural performance in terms that are meaningful to building owners. Performance levels quantified in the Guidelines range from “No Damage” to “Collapse” and include intermediate performance levels based on the post-earthquake occupancy classifications “Green Tag,” “Yellow Tag,” and “Red Tag.” Other features of the Guidelines include an emphasis on correctly identifying the governing mechanism of nonlinear behavior, practical methods for addressing the effects of strength degradation and residual drift, and a probability-based approach that incorporates uncertainty. Based on their studies of example buildings, the authors present recommendations for performing seismic assessments: quantifying post-earthquake occupancy classifications, identifying mechanisms of nonlinear behavior, estimating residual drift, and modeling strength degradation in structures.

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Doiphode, Dr G. S., et Vaibhav Dhndhukiya. « Performance Based Seismic Assessment of Masonry Infilled RCC Building with Diaphragm Discontinuity ». International Journal of Engineering and Advanced Technology 10, n^o 2 (30 décembre 2020) : 214–20. http://dx.doi.org/10.35940/ijeat.b2090.1210220.

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In multistoreyed RCC framed buildings, critical damages are due to seismic ground excitations, which cause catastrophic failuresat the weaker locations. Buildings with two types of structural irregularities namely diaphragm discontinuity and open ground story are considered. Assessment of seismic vulnerability of these buildings is done by using Nonlinear Static Pushover Analysis (NSPA). Performance Based Seismic Design of masonry infilled RCC buildings with two different shape of openings in the diaphragm is considered here with Design Basis Earthquake(DBE) and Maximum Considered Earthquake(MCE) where by selecting appropriate performance criteria in terms of Inter-story drift ratio(IDR) and Inelastic displacement demand ratio(IDDR) are critically observed. The Equivalent Linearization Procedure of Pushover analysis presented in FEMA 440, which is a modification of Capacity Spectrum Method based on ATC-40 guidelines, is performed in ETABS-2016 to study the performance of R.C.C. buildings with diaphragm discontinuity, designed as per IS-1893-2016.

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Yang, T. Y., J. C. Atkinson et L. Tobber. « Detailed Seismic Performance Assessment of High-Value-Contents Laboratory Facility ». Earthquake Spectra 31, n^o 4 (novembre 2015) : 2117–35. http://dx.doi.org/10.1193/092313eqs259m.

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Recent earthquakes worldwide have shown that even countries with well-established building codes are still vulnerable to economic and societal losses. To properly assess these seismic losses, risk managers and insurers need a well-defined tool to quantify the seismic performance of the facilities. In this paper, detailed performance-based earthquake engineering methodology is applied to assess the seismic vulnerability of a high-value-contents laboratory facility, in Vancouver, Canada. The study demonstrates a detailed implementation of the state-of-the-art performance assessment tools to quantify the seismic loss of facilities that can be readily used by practicing engineers. The results show the first benchmark study to quantify the performance of code-based design and provide valuable information for engineers and facility stakeholders to make informed risk-management decisions.

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Chen, Baokui, Li Fan, Jingang Xiong, Ming Wen et Yaru Liu. « Seismic Performance and Risk Assessment of Traditional Brick-Wood Rural Buildings Based on Numerical Simulation ». Advances in Civil Engineering 2021 (17 juillet 2021) : 1–16. http://dx.doi.org/10.1155/2021/7648989.

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The recent earthquakes have caused serious damage to Chinese rural houses. Research on the seismic performance and reinforcement for traditional rural houses is strongly needed. In this study, the seismic performance of traditional brick-wood structural houses in Jiangxi province and surrounding areas is analyzed and confirmed by site investigation and numerical simulation. And, the traditional constructions, such as the purlin roof and the cavity wall, are considered. These construction types can reduce the seismic behavior of rural houses, and limited research has been carried out. This study found that the structure will produce plastic deformation and local damage above 6-degree earthquake fortification action. The damage positions occurred in the walls close to purlins and the walls close to doors and windows. Given the above seismic safety problems, a reinforcement method of reinforced cement mortar strip and mesh surface is proposed, which is suitable for engineering applications for traditional rural houses. The seismic strengthening effect is analyzed by numerical simulation. Comparing the calculation results, it is found that the seismic performance of the structure after reinforcement is significantly enhanced, and the stress concentration of the walls is improved.

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Hou, Benwei, Xitao Ma, Kegong Diao, Zilan Zhong et Shan Wu. « Seismic Performance Assessment of Water Distribution Systems Based on Multi-Indexed Nodal Importance ». Water 13, n^o 17 (28 août 2021) : 2362. http://dx.doi.org/10.3390/w13172362.

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Seismic performance assessment of water distribution systems (WDSs) based on hydraulic simulation is essential for resilience evaluation of WDSs under earthquake disasters. The assessment is mainly to determine how the water supply will be affected due to pipe breaks caused by the earthquake, with the water supply loss estimated based on the loss of supply to nodes. Existing research works usually use the average or overall performance metric of all user nodes as the system performance indicator without considering user nodes’ individual performance and criticality. This paper proposes a framework to evaluate the importance of user nodes considering post-earthquake rescue service and the seismic performance of individual user nodes in the WDS, which supports the pipeline renovation plan to improve the performance of critical user nodes. The importance of user nodes is evaluated by a multi-index model, including the indices for daily service, post-earthquake rescue service, and network topology influence of user nodes. These indices evaluate the importance of user nodes in terms of their roles for daily water service, emergent rescue service, and water transmission to other nodes, respectively. Fragility model of pipelines evaluates the earthquake-induced damages of the WDS, and the seismic performance assessment of the WDS system is performed by the hydraulic model of the WDS with pipeline damages. The proposed framework is implemented in an actual WDS; the results show that the importance classification to user nodes by multi-index approach can identify the critical user nodes for post-earthquake rescue service, which traditional methods may ignore. The importance classification and seismic performance of individual user nodes make it feasible to check the seismic performance of critical user nodes and formulate a targeted pipeline renovation plan to focus limited resources on critical user nodes.

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Nettis, Andrea, Pietro Iacovazzo, Domenico Raffaele, Giuseppina Uva et Jose M. Adam. « Displacement-based seismic performance assessment of multi-span steel truss bridges ». Engineering Structures 254 (mars 2022) : 113832. http://dx.doi.org/10.1016/j.engstruct.2021.113832.

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Scupin, A., R. Văcăreanu et F. Pavel. « Seismic performance assessment based on displacement capacity of unreinforced masonry structures ». IOP Conference Series : Earth and Environmental Science 664, n^o 1 (1 mai 2021) : 012087. http://dx.doi.org/10.1088/1755-1315/664/1/012087.

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Faramarzi, Mohammadreza Salek, et Touraj Taghikhany. « A comparative performance-based seismic assessment of strongback steel braced frames ». Journal of Building Engineering 44 (décembre 2021) : 102983. http://dx.doi.org/10.1016/j.jobe.2021.102983.

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Zheng, Xiaodong, et Jianguo Hao. « Research on Seismic Assessment of Gravity Dam Based on Performance Analysis ». IOP Conference Series : Earth and Environmental Science 376 (17 décembre 2019) : 012036. http://dx.doi.org/10.1088/1755-1315/376/1/012036.

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Wu, Qiao-yun, Hong-ping Zhu et Jian Fan. « Performance-based seismic financial risk assessment of reinforced concrete frame structures ». Journal of Central South University 19, n^o 5 (27 avril 2012) : 1425–36. http://dx.doi.org/10.1007/s11771-012-1159-2.

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Vamvatsikos, Dimitrios, et Matjaž Dolšek. « Equivalent constant rates for performance-based seismic assessment of ageing structures ». Structural Safety 33, n^o 1 (janvier 2011) : 8–18. http://dx.doi.org/10.1016/j.strusafe.2010.04.005.

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Kunnath, Sashi K., et Amin Ahmadi. « Selection of Ground Motions for Performance-Based Seismic Assessment of Structures ». Advanced Materials Research 639-640 (janvier 2013) : 111–17. http://dx.doi.org/10.4028/www.scientific.net/amr.639-640.111.

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It is well known that one of the most significant sources of uncertainty and variability in seismic demand prediction arises from ground motion selection. The task of selecting appropriate ground motions can become a formidable given the limited database of earthquake records that satisfy the required site parameters. Moreover, from a practical consideration, it is necessary to limit the number of ground motions used in the evaluation process while at the same time minimizing the dispersion in the demand estimation. This presentation will examine the effectiveness of three ground-motion selection schemes: (i) magnitude scaling; (ii) spectrum matching; and (iii) conditional mean spectra. Findings from comprehensive nonlinear time history simulations indicate that while spectral matching is slightly more effective in reducing dispersion compared to scaling, it may modify ground motion content which can alter the location of peak demands. The conditional mean spectrum is less effective in reducing dispersion in demands when amplitude scaling is used

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Ladjinovic, Djordje, Aleksandra Radujkovic et Andrija Raseta. « Seismic performance assessment based on damage of structures, Part 1 : Theory ». Facta universitatis - series : Architecture and Civil Engineering 9, n^o 1 (2011) : 77–88. http://dx.doi.org/10.2298/fuace1101077l.

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The paper presents methodology for safety assessment and design of earthquake resistant structures based on application of damage spectra. The damage spectrum can be used for seismic evaluation of vulnerability of structures with given properties and can provide information of damage potential of the recorded ground motions. Damage spectrum represents a variation of a damage index versus structural period for a single-degree-of-freedom system subjected to an earthquake ground motion. The improved damage index, based on plastic deformation and hysteretic energy dissipation, is applied. It depends on maximal plastic deformation, ductility capacity and function including cumulative damage effects. This function, besides the parameter including influence of deterioration, depends on the history of cyclic deformations and on both cyclic and accumulative ductility.

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Hariri-Ardebili, M. A., S. Sattar et H. E. Estekanchi. « Performance-based seismic assessment of steel frames using endurance time analysis ». Engineering Structures 69 (juin 2014) : 216–34. http://dx.doi.org/10.1016/j.engstruct.2014.03.019.

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Araújo, Miguel, Luís Macedo, Mário Marques et José Miguel Castro. « Code-based record selection methods for seismic performance assessment of buildings ». Earthquake Engineering & ; Structural Dynamics 45, n^o 1 (18 août 2015) : 129–48. http://dx.doi.org/10.1002/eqe.2620.

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Esmaili, Omid, Lisa Grant Ludwig et Farzin Zareian. « Improved performance-based seismic assessment of buildings by utilizing Bayesian statistics ». Earthquake Engineering & ; Structural Dynamics 45, n^o 4 (5 novembre 2015) : 581–97. http://dx.doi.org/10.1002/eqe.2672.

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Liu, Qiang, et Chunyan Yang. « Seismic Damage Probability Assessment of Isolated Girder Bridges Based on Performance under Near-Field Earthquakes ». Applied Sciences 11, n^o 20 (14 octobre 2021) : 9595. http://dx.doi.org/10.3390/app11209595.

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This paper presents a copula technique for developing seismic fragility curves for an RC (reinforced concrete) isolated continuous girder bridge, by considering earthquake damage indicators such as bridge piers, isolated bearing components, and the main girder of collision damage. The results of this method are compared with those of the limit method of the first-order reliability theory. Meanwhile, the incremental dynamic analysis of the bridge structure under different failure conditions is carried out, and the randomness of the near-fault ground motion and the structural parameters are accounted. Based on the damage index of the isolated bridge under different damage conditions, the seismic fragility curves of each component and the whole isolated bridge are obtained. The research shows that the safety control of the isolated continuous girder bridge structure is mainly affected by the seismic fragility of the isolated bearing, the influence of bridge pier seismic fragility is relatively small, and the probability of beam collision in an isolated bridge is lower than that of a general bridge without isolation bearing. By applying the isolation scheme, the probability of different damage state of the bridge structure is greatly reduced, thus the seismic performance is improved. It also verifies the efficiency and superiority of copula technology. The results will provide a reference for future seismic damage prediction.

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Petruzzelli, Fabio, et Iunio Iervolino. « NODE : a large‐scale seismic risk prioritization tool for Italy based on nominal structural performance ». Bulletin of Earthquake Engineering 19, n^o 7 (18 avril 2021) : 2763–96. http://dx.doi.org/10.1007/s10518-021-01093-1.

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AbstractPrioritization of seismic risk mitigation at a large scale requires rough-input methodologies able to provide an expedited, yet conventional, assessment of the seismic risk corresponding to the portfolio of interest. In fact, an evaluation of seismic vulnerability at regional level by means of mechanics-based methods is generally only feasible for a fraction of the portfolio, selected according to prioritization criteria, due to the sheer volume of information and computational effort required. Therefore, conventional assessment of seismic risk via simple indices has been proposed in literature and in some guidelines, mainly based on the comparison of code requirements at the time of design and current seismic demand. These indices represent an attempt to define a relative seismic risk measure for a rapid ranking to identify the part of the portfolio that deserves further investigation. Although these risk metrics are based on strong assumptions, they have the advantage of only requiring easy-to-retrieve data, such as design year and location as the bare minimum, making them suitable for applications within the risk analysis industry. Moreover, they can take both hazard and vulnerability into account, albeit conventionally, and can be manipulated in order to account for exposure in terms of individual or societal risks. In the present study, the main assumptions, limitations, and possible evolutions of existing prioritization approaches to nominal risk are reviewed, with specific reference to the Italian case. Furthermore, this article presents the software NODE (available to interested readers), which enables the computation of location-specific code-based seismic performance demands, according to the Italian code and the evolution of seismic classification since 1909. Finally, this study intends to contribute to the ongoing debate on strategies for large-scale seismic assessment for building stock management purposes.

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IMAI, T., S. WADA et T. KOIKE. « SEISMIC RISK ASSESSMENT AND MITIGATION FOR THE EXISTING LIFELINE ». Journal of Earthquake and Tsunami 05, n^o 01 (mars 2011) : 31–45. http://dx.doi.org/10.1142/s1793431111001108.

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In order to keep the existing lifeline network system at a favorable seismic performance level, it is necessary to carry out retrofitting activities. This study proposes a seismic risk assessment method for the existing deteriorated lifeline network system based on the probability of system performance failure. Numerical simulations are carried out for the existing water distribution network system for several seismic investment strategies to support the decision making of seismic disaster mitigation planning. Effective planning of seismic retrofitting activities and disaster mitigation for the existing lifeline system can be realized using the newly developed assessment method.

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Wang, Zeng Zhong, et Yu Xin Zhang. « Probabilistic Seismic Risk Assessment for Transportation Network ». Advanced Materials Research 446-449 (janvier 2012) : 2351–56. http://dx.doi.org/10.4028/www.scientific.net/amr.446-449.2351.

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This paper presents a probabilistic seismic risk assessment methodology developed for Highway Bridge including models for transportation network analysis, hazard estimation, and seismic performance of highway components and evaluation of the economic impact to serve as a tool in the decision process for earthquake disaster management including pre-earthquake and post earthquake actions. This study is focused on the development of a procedure for seismic risk assessment, based on a probabilistic seismic hazard analysis.

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Roeder, Charles W., Eric J. Lumpkin et Dawn E. Lehman. « Seismic Performance Assessment of Concentrically Braced Steel Frames ». Earthquake Spectra 28, n^o 2 (mai 2012) : 709–27. http://dx.doi.org/10.1193/1.4000006.

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Concentrically braced frames (CBFs) are stiff, strong structures, which are used for many seismic design applications. The seismic performance of CBFs varies widely because their behavior is a complex combination of resistance, elastic stiffness, and inelastic behavior and deformation. Performance-based seismic engineering (PBSE) is increasingly important. Fragility curves are statistical estimates of performance as a function of an engineering demand parameter. The Applied Technology Council's ATC-58 program is developing fragility curves for a wide range of structural systems, and this paper describes the development of fragility curves for CBF systems using experimental data that accurately simulated the boundary conditions and inelastic response of CBFs. Fragility curves were developed for common brace cross sections and gusset plate geometries at various damage states. In addition, fragility curves were developed for CBFs designed using an improved design procedure and compared to those designed using standard design methods.

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Kwag, Shinyoung, Daegi Hahm, Minkyu Kim et Seunghyun Eem. « Development of a Probabilistic Seismic Performance Assessment Model of Slope Using Machine Learning Methods ». Sustainability 12, n^o 8 (17 avril 2020) : 3269. http://dx.doi.org/10.3390/su12083269.

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The objective of this study is to propose a model that can predict the seismic performance of slope relatively accurately and efficiently by using machine learning methods. Probabilistic seismic fragility analyses of the slope had been carried out in other studies, and a closed-form equation for slope seismic performance was proposed through a multiple linear regression analysis. However, the traditional statistical linear regression analysis showed a limit that could not accurately represent such nonlinear slope seismic performances. To overcome this limit, in this study, we used three machine learning methods (i.e., support vector machine (SVM), artificial neural network (ANN), Gaussian process regression (GPR)) to generate prediction models of the slope seismic performance. The models obtained through the machine learning methods basically showed better performance compared to the models of the traditional statistical methods. The results of the SVM showed no significant performance difference compared with the results of the nonlinear regression analysis method, but the results based on the ANN and GPR showed a remarkable improvement in the prediction performance over the other models. Furthermore, this study confirmed that the GPR-based model predicted relatively accurate seismic performance values compared with the model through the ANN.

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Bradley, Brendon A. « A comparison of intensity-based demand distributions and the seismic demand hazard for seismic performance assessment ». Earthquake Engineering & ; Structural Dynamics 42, n^o 15 (24 juin 2013) : 2235–53. http://dx.doi.org/10.1002/eqe.2322.

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Park, Sangki, et Kichul Jung. « Gaussian Process Regression-Based Structural Response Model and Its Application to Regional Damage Assessment ». ISPRS International Journal of Geo-Information 10, n^o 9 (24 août 2021) : 574. http://dx.doi.org/10.3390/ijgi10090574.

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Seismic activities are serious disasters that induce natural hazards resulting in an incalculable amount of damage to properties and millions of deaths. Typically, seismic risk assessment can be performed by means of structural damage information computed based on the maximum displacement of the structure. In this study, machine learning models based on GPR are developed in order to estimate the maximum displacement of the structures from seismic activities and then used to construct fragility curves as an application. During construction of the models, 13 features of seismic waves are considered, and six wave features are selected to establish the seismic models with the correlation analysis normalizing the variables with the peak ground acceleration. Two models for six-floor and 13-floor buildings are developed, and a sensitivity analysis is performed to identify the relationship between prediction accuracy and sampling size. A 10-fold cross-validation method is used to evaluate the model performance, using the R-squared, root mean squared error, Nash criterion, and mean bias. Results of the six-parameter-based model apparently indicate a similar performance to that of the 13-parameter-based model for the two types of buildings. The model for the six-floor building affords a steadily enhanced performance by increasing the sampling size, while the model for the 13-floor building shows a significantly improved performance with a sampling size of over 200. The results indicate that the heighted structure requires a larger sampling size because it has more degrees of freedom that can influence the model performance. Finally, the proposed models are successfully constructed to estimate the maximum displacement, and applied to obtain fragility curves with various performance levels. Then, the regional seismic damage is assessed in Gyeonjgu city of South Korea as an application of the developed models. The damage assessment with the fragility curve provides the structural response from the seismic activities, which can assist in minimizing damage.

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Candia, Gabriel, Jorge Macedo, Miguel A. Jaimes et Carolina Magna‐Verdugo. « A New State‐of‐the‐Art Platform for Probabilistic and Deterministic Seismic Hazard Assessment ». Seismological Research Letters 90, n^o 6 (11 septembre 2019) : 2262–75. http://dx.doi.org/10.1785/0220190025.

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ABSTRACT A new computational platform for seismic hazard assessment is presented. The platform, named SeismicHazard, allows characterizing the intensity, uncertainty, and likelihood of ground motions from subduction‐zone (shallow interface and intraslab) and crustal‐zone earthquakes, considering site‐specific as well as regional‐based assessments. The platform is developed as an object‐oriented MATLAB graphical user interface, and it features several state‐of‐the‐art capabilities for probabilistic and deterministic (scenario‐based) seismic hazard assessment. The platform integrates the latest developments in performance‐based earthquake engineering for seismic hazard assessment, including seismic zonation models, ground‐motion models (GMMs), ground‐motion correlation structures, and the estimation of design spectra (uniform hazard spectra, classical conditional mean spectrum (CMS) for a unique tectonic setting). In addition to these standard capabilities, the platform supports advanced features, not commonly found in existing seismic hazard codes, such as (a) computation of source parameters from earthquake catalogs, (b) vector‐probabilistic seismic hazard assessment, (c) hazard evaluation based on conditional GMMs and user‐defined GMMs, (d) uncertainty treatment in the median ground motions through continuous GMM distributions, (e) regional shaking fields, and (f) estimation of CMS considering multiple GMMs and multiple tectonic settings. The results from the platform have been validated against accepted and well‐documented benchmark solutions.

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Alegre, André, Sérgio Oliveira, Paulo Mendes, Jorge Proença, Rafael Ramos et Ezequiel Carvalho. « Seismic Safety Assessment of Arch Dams Using an ETA-Based Method with Control of Tensile and Compressive Damage ». Water 14, n^o 23 (25 novembre 2022) : 3835. http://dx.doi.org/10.3390/w14233835.

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The seismic safety assessment of large concrete dams remains a significant challenge in dam engineering, as it requires appropriate analysis methods, modern performance criteria, and advanced numerical models to simulate the dam seismic behavior. This paper presents a method for seismic safety assessment of arch dams based on Endurance Time Analysis (ETA), using tensile and compressive damage results from a robust formulation for seismic analysis considering joint opening/sliding and concrete non-linear behavior (finite element program DamDySSA, under development in LNEC). The seismic performance is evaluated by controlling the evolution of the damage state of the dam, according to predefined performance criteria, to estimate acceleration endurance limits for tensile and compressive damage. These acceleration limits are compared, respectively, with the peak ground accelerations prescribed for the Operating Basis Earthquake (OBE) and Safety Evaluation Earthquake (SEE), aiming to evaluate the dam seismic performance relative to both earthquake levels efficiently, using a single intensifying acceleration time history. The ETA-based method is applied to the cases of Cabril Dam (132 m-high) and Cahora Bassa Dam (170 m-high), confirming its usefulness for future seismic safety studies, while the potential of DamDySSA for non-linear seismic analysis of arch dams is highlighted.

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