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Gotowa bibliografia na temat „ECCENTRIC BRACED”

Autor: Grafiati

Data publikacji: 11 września 2023

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Artykuły w czasopismach na temat "ECCENTRIC BRACED"

Jalali, Maryam, Farzam Farahmand, Tahmineh Rezaeian, Daniel K. Ramsey i Seyed Mohammad Ebrahim Mousavi. "Electromyographic analysis of anterior cruciate deficient knees with and without functional bracing during lunge exercise". Prosthetics and Orthotics International 40, nr 2 (17.12.2014): 270–76. http://dx.doi.org/10.1177/0309364614560940.

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Background:The use of functional knee braces for returning to sports or during demanding activities following anterior cruciate ligament rupture is common; yet despite being commonly prescribed, its mechanism of action remains unknown.Objectives:To examine the effect of functional knee braces on mean muscle activity when performing lunge exercises.Study design:Pre-/post-test (within-subject research design).Methods:A total of 10 male participants with unilateral isolated anterior cruciate ligament deficiency participated. Electromyographic activities of six muscles around the knee were recorded during lunge exercises, with and without wearing a custom functional knee brace. The lunge cycle movement was subdivided into three phases: eccentric, isometric, and concentric.Results:The quadriceps and hamstrings were no different in the braced and unbraced conditions. When braced, the mean amplitude of the medial gastrocnemius was significantly lower throughout the whole movement (p = 0.01) and during the concentric (p = 0.006) and eccentric (p = 0.028) phases, but not within the isometric phase. The lateral gastrocnemius was found to have lower mean amplitude in the isometric phase (p = 0.044).Conclusion:With its origin on the medial femoral condyle, perhaps reduced medial gastrocnemius activity may better guide knee rotation and assist the joint achieving a healthier kinematic pattern.Clinical relevanceLower medial gastrocnemius activity may facilitate lower medial compartment contact pressure, for which greater loading is known to increase the risk of osteoarthritis in anterior cruciate ligament–deficient (ACLD) knees. However, further research is needed.

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Yamanouchi, H., M. Midorikawa, I. Nishiyama i M. Hirosawa. "An eccentric‐K braced steel structure". Batiment International, Building Research and Practice 15, nr 1-6 (styczeń 1987): 305–13. http://dx.doi.org/10.1080/09613218708726840.

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Mohammadi, Sajjad, Abd-ol-Reza Sarvghad Moghaddam i Alireza Faroughi. "The effect of number and position of braced frames on column behavior of the dual steel structural system (MRF and EBF) (With a view on amplified seismic load)". Ciência e Natura 37 (21.12.2015): 277. http://dx.doi.org/10.5902/2179460x20858.

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In seismic design of structures, determination of number and position of braced frames, considering the architectural scheme of projects, is usually confronted by obstacles. Due to this fact, in some cases, selecting the best location and number of braced bays has led to mistakes in determination of their adjacent members (columns) design loads. One of the seismic design requirements of lateral resisting system is to control the columns adjacent to braced bays for load combinations of amplified seismic load, which is a function of over-strength factor of the structure. This research aims to present and introduce the best structural model of number and position of braced frames in a structural system, such as steel moment resisting frame and eccentric braces dual system; because in 3rd revision of Iranian 2800 standard of seismic provision, there are statements and criteria provided only for capacity of moment frame, not for braces. Though the amplified seismic load function is controlled in models which columns are connected to braces in 2 directions, and seismic loads are applied in those 2 directions, number of damage hinges (Exceeding CP) is significantly increased in comparison to the models with straggly braces. As the increase in axial force of these columns leads to decrease in their moment capacity (despite controlling the amplified seismic load provision), columns in dual systems that resist flexure, would be damaged and exceed the collapse threshold much sooner than other columns. This important fact is not presented in Iranian or even American codes and provisions.

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Hosseini, Seyed Mohammad, i Gholamreza Ghodrati Amiri. "Successive collapse potential of eccentric braced frames in comparison with buckling-restrained braces in eccentric configurations". International Journal of Steel Structures 17, nr 2 (czerwiec 2017): 481–89. http://dx.doi.org/10.1007/s13296-017-6008-6.

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Lei, Jin Song, Yin Sheng Zou, Ya Li Wang i Qing Ma. "Nonlinear Dynamic Response Analysis of the Braced Steel Frame with Wedge Devices". Advanced Materials Research 368-373 (październik 2011): 685–89. http://dx.doi.org/10.4028/www.scientific.net/amr.368-373.685.

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In order to research the nonlinear dynamic respond analysis of a new braced steel frame with wedge devices under the action of earthquake, its damping mechanism is analyzed, and the computational model is obtained. Based on the mechanism of multiple resistant lateral system, the explicit nonlinear dynamic analysis and dynamic contact algorithm are adopted to separately analyze the steel frame with no brace, with centric and eccentric brace, and with the new braced wedge block. During the analysis, in order to take the material and geometrical bi-nonlinear into account, the material model is chosen as the bilinear equivalent strength, and the explicit centered difference algorithm is adopted. It can be obtained from structural deformation and energy and so on. The results show that the stiffness of structure decays after plastic deformation in the earthquake effect, and the hysteresis energy consumption and system dumping appear. The nonlinear dynamic response of steel frame is affected by resistant lateral stiffness, plastic deformation, and system damping. The braced steel frame with wedge block regulates the displacement and acceleration response with yield energy dissipation of brace, as it provides resistance lateral stiffness to control the deformation. This kind of structure has strong adaptability to earthquake intensity and good seismic performance.

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Marquez A., Edelis del V., William Lobo-Q i Juan C. Vielma. "Comparative Analysis of the Energy Dissipation of Steel Buildings with Concentric and Eccentric Braces". Open Civil Engineering Journal 9, nr 1 (28.05.2015): 295–307. http://dx.doi.org/10.2174/1874149501509010295.

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A comparative study has been done to analyze the behavior of regular steel building structures of 4, 6, 8 and 10 stories, located in seismic zone 5 and soil type S1. The structures were upgraded with different brace configurations according to current Venezuelan codes. A total number of 24 numerical models were analyzed considering non-linear static and incremental dynamic analysis (IDA). The buildings were initially designed as moment resisting frames, and upgraded with six different bracing configurations: concentric braces in “X” and inverted “V”; eccentric braces inverted "V" with horizontal links, inverted “Y” and “X” with vertical links. Short length links were used to ensure a shear failure. The used methodology is based on obtaining the capacity, IDA curves, and bilinear approximations of these curves that allow the determination of yield and ultimate capacity points, in order to estimate important parameters of seismic response: overstrength and ductility; and considering these areas under the curves to estimate elastic deformation energy, energy dissipated by hysteretic damping and equivalent damping. According to the results, the cases with no brace enhancement showed the lowest lateral strength and lateral stiffness and high deformation capacity. On the other hand, the concentric bracing cases, resulted with the highest stiffness and strength and the lowest deformation capacity, therefore they have low ductility and energy dissipation capacity under seismic loading. Structures with links showed intermediate stiffness and strengths, resulting in the best performance in terms of ductility and energy dissipation capacity. The present study provides a better understanding of the benefits of eccentrically braced systems.

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Yang, Wen Xia, Qiang Gu i Zhen Sen Song. "Response Modification Factor for Y-Eccentric-Braced Steel Frame Structures". Advanced Materials Research 250-253 (maj 2011): 2285–90. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.2285.

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In current seismic design procedure, structural base shear is calculated according to the linear elastic response spectra divided by response modification factorR. The response modification factor is important to the reliability and economy of building seismic design. In this paper, the response modification factors of Twelve Y-eccentric braced steel frames with various stories and spans lengths were evaluated by capacity spectrum method based on the global capacity envelops obtained from an improved pushover analysis and incremental dynamic analysis. According to the results, an appropriate formula of the response modification factor for the Y-eccentric braced steel frames was suggested.

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Baktash, Parvaneh, i Cedric Marsh. "Damped moment-resistant braced frames: a comparative study". Canadian Journal of Civil Engineering 14, nr 3 (1.06.1987): 342–46. http://dx.doi.org/10.1139/l87-054.

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This paper reports a study on the comparisons between the behaviours of braced steel building frames with friction joints and with eccentric bracing, under seismic forces. Nonlinear time-history dynamic analysis is used. Friction damping is shown to be of particular merit. Key words: bracing, damping, ductility, dynamics, earthquakes, eccentric; energy dissipation, friction, hysteresis loops, response, steel frames, time history.

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Susanti, Lilya, i Ming Wijaya. "Eccentricity effect on the cyclic response of braced frame type-V". Civil and Environmental Science 005, nr 01 (1.04.2022): 089–95. http://dx.doi.org/10.21776/ub.civense.2022.00501.9.

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Eccentricity on the braced frames can sometimes not be avoided to facilitate some structural considerations, such as openings. V-type braced frames are among the most widely used bracing types because of their satisfying performance. The present study investigated the effect of eccentricity as 15 cm, and 25 cm on the reinforced concrete braced frames of 80 cm x 100 cm in dimension compared to V-type of Concentric Braced Frame (CBF). Results indicated that a frame with 15 cm of eccentricity has almost similar stress but higher strain compared to the CBF while the frame with 25 cm of eccentricity resulted in lowest stress but highest strain. As the eccentricity rises, a frame is likely to behave as a moment-resisting frame. Link beams are the most critical part of the Eccentric Braced Frame

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YILMAZ, Mehmet Fatih. "The Effect of Different Braced Configurations on the Nonlinear Seismic Behavior of Steel Structure". Civil Engineering Beyond Limits 1, nr 1 (30.12.2019): 22–28. http://dx.doi.org/10.36937/cebel.2020.001.005.

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Improvements in construction technologies have allowed steel structural elements to become more frequently used today in order to enable different architectural designs and to meet structural performance more effectively and efficiently. Structural steel has been used for more than a hundred years and has been tested under real earthquakes, which provide the basis of many earthquake-resistant steel construction standards. The major advantage of steel construction material is that it allows for large plastic deformations. Structural deformations vary depending on the deformation capacity of the structural components in addition to the configuration of the structural components. In this study, moment resisting frames (MRF), X braced frame (XBF), Inverse V braced frame (IVBF), K braced frame (KBF), and eccentric inverse V braced frames (EIVBF) were used to examine the effect of different steel braced systems on the plastic deformation capacity of steel structure with the help of nonlinear static pushover analysis. Bilinear material model was utilized to represent nonlinear steel material behavior and inelastic displacement-based frame element were used to represent column and beam element. The analyses' results demonstrated that the braced frame configuration had a significant effect on the lateral response of steel frame structures.

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Rozprawy doktorskie na temat "ECCENTRIC BRACED"

Al-Azzawi, Hosam Abdullah. "Strength Tuned Steel Eccentric Braced Frames". PDXScholar, 2019. https://pdxscholar.library.pdx.edu/open_access_etds/4981.

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The primary component in eccentrically braced frames (EBF) is the link as its plastic strength controls the design of the frame as well as the entire building within which it is installed. EBFs are the first part of building design and every other component is sized based on the forces developed in the link. Oversized link elements lead to the use of unnecessary materials and can increase construction costs. Additionally, the advantages of using a continuous member of the same depth for both the link and the controller beam (in terms of the cost and the time) motivates researchers to find a way to control the link strength in conventional EBFs. Previous studies on the link-to-column connections in EBF have shown that the links are likely to fail before reaching the required rotation due to fractures at low drift level. Moreover, improving the strength of the links in EBF depends primarily on their ability to achieve target inelastic deformation and to provide high ductility during earthquakes. Therefore, in this study, the concept of tuned link strength properties in EBF, T-EBF, is experimentally introduced as a solution to improve the performance of the link in conventional EBF by cutting out an opening in the link web. Furthermore, a new brace-to-link connection is proposed to bolt the brace member with the link in contrast to the conventional method of welding them. This new idea in continuous beam design was investigated to verify the stability of the tuned eccentrically braced frame, either welded or bolted, with a bracing member. A total of four full-scale cyclic tests were conducted to study the ability of T-EBF to achieve inelastic deformation. The specimens have two different cross sections: W18x76 and W16x67, two different sections where the brace was welded to the link, and two other specimens at different sections where the brace was bolted to the link were examined. The experimental results indicate that the link in T-EBF can achieve high rotation, exceeding 0.15 rad, and an overstrength factor equal to 1.5. Failure involved included web buckling at very high rotation. The T-EBF displayed a very good, non-replaceable ductile link. The experiments were followed by an isotropic kinematic-combined hardening model in the finite element analyses (FEA). The FEA analysis is developed to predict the effect of web opening configuration on the local section stresses and strains and global characteristics of the frame. FEA exhibits good agreement with the experimental results and can capture the inelastic buckling behavior of the sections. The link configuration parameters of the T-EBF were studied extensively on a W18x76 shear link subjected to the 2016 AISC seismic design provisions loading protocol (ANSI/AISC 341-16, 2016). The parametric study also included the performance of a range of wide flange sections. The analysis shows that the reduced web section has effect on the plastic strain in which low plastic strain observed near ends and connections and high at the center of the web. Results also demonstrate that if the shear link is appropriately sized with web opening and intermediate web stiffeners provided, an excellent shear link with high ductility under cyclic loads can be obtained. Changing the configuration of the opening cutout also had a significant effect on reducing the transition zone cracks.

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Evans, John Paul. "Shear Forces Developed in Link Beams of Eccentric Braced Frames". OpenSIUC, 2012. https://opensiuc.lib.siu.edu/theses/801.

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Eccentric braced frames have been a topic of research in seismic design over the past twenty years. The idea of eccentric bracing is a relatively new method used in practice to satisfy seismic design requirements. They have been proven to give reliable results in tests using simulated earthquake events, as well as provide an economical advantage over other framing methods. Two one-story eccentric braced frame models were created using computer generated finite element analysis. The example chosen for this study are discussed further. The maximum shear stress distribution in the link beam of the frame, using finite element analysis, will be investigated herein. The results of the shear stress produced gives insight to shear forces developed in the link beam of eccentric braced frames. The results of shear forces produced are compared with those calculated by structural engineers using commonly used hand calculated equations.

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Prinz, Gary S. "Using Buckling-Restrained Braces in Eccentric Configurations". BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2134.

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Ductile braced frames are often used to resist lateral earthquake loads in steel buildings; however the presence of a brace element can sometimes interfere with architectural features. One common type of ductile braced frame system sometimes used to accommodate architectural features is the eccentrically braced frame (EBF). In order to dissipate seismic forces, EBF beam regions (called links) must sustain large inelastic deformations. EBF links with column connections must transmit large moments and shear forces to facilitate link rotation. Experiments have shown that welded link-to-column connections tend to fracture in the link flange prior to large link rotations. This study investigated methods for improving EBF link-to-column connection performance, and proposed an alternative ductile braced frame system for accommodating architectural features. Several EBF links with reduced web and flange sections were analytically investigated using validated finite element models in ABAQUS. Results indicated that putting holes in the link web reduced stress and strain values in the link flanges at the connection, but increased the plastic strain and stress triaxiality in the web at the edges of holes. Removing area from the link flanges had little effect on connection stresses and strains. Thus, the reduced web section and reduced flange section methods are not a promising solution to the EBF link-to-column connection problem. The alternative braced frame system proposed in the dissertation used ductile beam splices and buckling-restrained braces in eccentric configurations (BRBF-Es) to accommodate architectural features. Design considerations for the BRBF-Es were determined and dynamic BRBF-E performance was compared with EBF performance. BRBF-E system and component performance was determined using multiple finite element methods. Inter-story drifts and residual drifts for the BRBF-Es were similar to those for EBFs. Results indicated that BRBF-Es are a viable alternative to the EBF, and may result in better design economy than EBFs. With the BRBF-E, damage was isolated within the brace, and in the EBF, damage was isolated within the link, indicating simpler repairs with the BRBF-E. Shop welding of BRBF-E members may replace the multiple field welds required in EBF construction.

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RAZDAN, PRAFUL. "ANALYSIS OF CONCENTRIC AND ECCENTRIC BRACED STEEL STRUCTURES". Thesis, 2019. http://dspace.dtu.ac.in:8080/jspui/handle/repository/16954.

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Many existing steel strcuture ought to be retrofitted to vanquish the needs to restricts the vertical loading. Incthecpresent investigation a 9 storiescsteelcbuilding has been analysed and from that point broke down in view of sidelong tremor because of seismic forces, live weight subjected on it and dead weight.cThe presentation of the similar steelcbuildingchas been investigated for variouscsorts of bracing frame work for instances eccentricc(V)bracesandcconcentric (X) braces. The introduction of the structure has been overviewed subjected to horizontal storey displacement, the storey drifts, bendingcmomentsand axialcforces in different beamsandccolumns in the structure at variousclevels. The feasibilitycofcvarious kinds of thecbracingsystemscsupporting the structure has moreover beencinvestigated. Allcthemorecsignificantly, the decrease in the horizontal displacement has been discovered for various kinds of the bracing frameworks in contrast with structurecwithcno bracing. From the pastcexamination, it hascbeen noticed thatcthecconcentric (X) propping decrease progressivelycsidelonglateralcdisplcement and in thiscwayfundamentallycadds to more prominentcstiffness to thecstructure.

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Safai, Aliyeh Jowrkesh. "Analytical studies of a 49-storey eccentric braced building". Thesis, 2001. http://hdl.handle.net/2429/12733.

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The purpose of this research is to study the seismic behaviour of a well instrumented 49-storey steel frame building in San Francisco, California. The building was subjected to ground motions from the Loma Prieta earthquake (M[sub s] = 7.1) of October 17, 1989. During the earthquake the building response appeared to remain in the elastic range. In recent years, serious efforts have been undertaken to develop the concept of energy dissipation or supplemental damping into a workable technology, and a number of these devices have been installed in structures throughout the world. The focus of this study was a comparative study between dynamic behaviour of an instrumented 49-storey eccentrically braced frame building and dynamic behaviour of the same building with the eccentric braces replaced with a friction damper energy dissipation system. In addition to study of passive energy systems, a study of floor response spectra was also carried out, and the results were compared with the results using National Building Code of Canada (NBCC, 1995) and Uniform Building Code (UBC, 1997) regulations. Detailed three-dimensional linear and nonlinear dynamic computer analyses of the building was carried out for the eccentric braced and the comparative friction damped case, respectively. The results from the frequency domain system identification analyses was utilized to make verify the assumptions made and to match the results of numerical analyses with the recorded values. The results of this study showed that by performing a linear three-dimensional analysis, the actual response of the building during past earthquake could be reproduced with confidence. The hypothetical friction damped building behaved very well substantially reducing the storey force demand and relative storey displacements.

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La, Manna Ambrosino Giuseppe. "SEISMIC PERFORMANCE OF DUAL - STEEL ECCENTRIC - BRACED FRAMES IN SIMPLE AND DUAL CONFIGURATION". Tesi di dottorato, 2014. http://www.fedoa.unina.it/9741/1/La_Manna_Ambrosino_Giuseppe_26.pdf.

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The work summarized in this thesis is devoted to investigate the seismic response of eccentric braced frames in simple and dual configuration (namely structural systems made of moment-resisting frames in parallel with braced frames) designed with the combined use of high strength steel (HSS) and of mild carbon steel (MCS). In particular, the first part of the thesis concerns the issues related to both design and verification check. In the second part, a wide and comprehensive parametric study is described and discussed in order to characterize the performance of an ensemble of reference buildings. To this aim, several design parameters are examined, such as: the number of storeys the length of bays, the grade of steel, the steel column sections and the soil foundation. The results from both nonlinear static and incremental dynamic analyses are presented and discussed thus allowing to draft novel design to improve the seismic performance of the examined structural typology. In the third part of the thesis, on the basis of the numerical results obtained from the parametric study, a preparatory study addressed to design the experimental setup for a real scale steel building made of dual Eccentric braced frame having removable links. The aim is to investigate the recentering capacity that the moment resisting spans may provide.

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Książki na temat "ECCENTRIC BRACED"

Effect of the Achilles tendon adhesive taping and Pro M-P Achilles strap on eccentric plantar flexion peak torque. 1994.

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Części książek na temat "ECCENTRIC BRACED"

Farheen, Fathima, i S. P. Akshara. "Comparison of Seismic Performance of Knee Braces in Steel Frames with Y Shaped Eccentric Braces". W Lecture Notes in Civil Engineering, 551–62. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-26365-2_51.

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Shankar, H. J. Prajwal, Sunil Lamsal, Praveen Shrestha, Bharathi Ganesh i R. Prabhakara. "Performance Evaluation of Concentric and Eccentric Buckling Restrained Braces on the Dynamic Behaviour of RC Structures". W Lecture Notes on Multidisciplinary Industrial Engineering, 249–57. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3254-2_23.

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Biradar, Bapugouda B., Anoop I. Shirkol i Basanagouda I. Patil. "Seismic Evaluation of Eccentric Brace Frame Designed by Force-Based Design and Performance-Based Plastic Design Methods". W Proceedings of 17th Symposium on Earthquake Engineering (Vol. 2), 393–407. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1604-7_30.

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"Earthquake resistant design of eccentric, braced frame, steel buildings for improved inelastic response". W Behaviour of Steel Structures in Seismic Areas, 345–50. CRC Press, 2012. http://dx.doi.org/10.1201/b11396-52.

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Glancy, Mark. "Chapter 14". W Cary Grant, the Making of a Hollywood Legend, 172–86. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190053130.003.0015.

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Following Elsie Leach’s release from the asylum in 1936, Cary Grant began to rebuild his relationship with his mother. In her many letters to him, she addressed him as Archie, and she urged him to visit her and hinted that she would like to visit him in Hollywood. He was reluctant to bring her to California, where he lived a life among the rich and famous, with friends including the newspaper tycoon William Randolph Hearst and the eccentric millionaire Howard Hughes. On screen, his reputation was enhanced when he reunited with George Cukor and Katharine Hepburn in the sophisticated comedy Holiday (1938). He also branched out, playing a very unsophisticated, Cockney soldier in the British Empire adventure film Gunga Din (1939). Although his performance is delightfully zany, and Gunga Din was an enormous success on first release, it has not aged well. The film’s racist attitudes and imperialist ideology have rendered it unpalatable for modern audiences.

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"2 • Clavius’s Astronomical Legacy in Lisbon The Class on the Sphere". W Geo-Heliocentric Controversies The Jesuits, Tycho Brahe, and the Confessionalisation of Science in Seventeenth-Century Lisbon. Venice: Fondazione Università Ca’ Foscari, 2023. http://dx.doi.org/10.30687/978-886-969-661-9/002.

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This study provides a brief analysis of the Jesuit’s cosmological orthodoxy and the institutional framework in which it developed. There was a strong link between the Collegio Romano and the College of Saint Antão in the early seventeenth century, with several Lisbon professors being trained in Rome under Clavius, such as João Delgado, Christoph Grienberger, and Giovanni Paolo Lembo. In Lisbon, the Jesuit professors discussed the foundations of Ptolemaic astronomy and argued, alongside Clavius, that planets moved along solid epicycles and eccentrics.

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Ehrenfeld, David. "Obsolescence". W Swimming Lessons. Oxford University Press, 2002. http://dx.doi.org/10.1093/oso/9780195148527.003.0016.

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At the end of the Cretaceous period, the last dinosaurs disappeared from the earth, setting off an evolutionary jubilee among the Milquetoast-like mammals that survived them, and preparing the ground for what was to become, 65 million years later, a permanent source of gainful occupation for scientists whose job it is to wonder why the dinosaurs died out. Scores of reasons have been given for this remarkable concatenation of extinctions. Global climate and sea level were changed by a city-sized asteroid striking the earth near what is now the Yucatan, or by a massive set of volcanic eruptions, or by the solar system passing through the core of a giant molecular cloud, perhaps colliding with a supercomet loosened from the Oort cluster, which orbits the Sun beyond Pluto. Theories of catastrophic extinction abound. Some of the most daring even conjure up the specter of an unseen companion star to our Sun, named Nemesis, whose eccentric orbit brings a wave of potentially deadly comet showers—and extinctions—every 26 million years. But there are also paleontologists who argue that the dinosaurs went away gradually, not suddenly, over a period of millions of years, and that toward the end they coexisted with the earliest hooved mammals, including ancestors of horses, cows, and sheep. If extinction was gradual, a different line of thought opens up: perhaps the dinosaurs died out because they couldn’t adapt and compete in a changing world. The big lummoxes were obsolete. I heard about the dinosaurs’ obsolescence back in my student days. It was as satisfying a notion then as it is today, especially if you didn’t think about it too hard. Here were these lumbering, pea-brained reptiles, barely able to walk and chew gum at the same time, while all around and underneath them, cleverly hiding behind clumps of primitive vegetation and cleverly burrowing in tunnels in the ground, were the nerdy but smart little mammals about to emerge from the shadows and begin their ascent to glory—somewhat, it occurs to me now, like Bill Gates in the waning days of heavy manufacturing.

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Streszczenia konferencji na temat "ECCENTRIC BRACED"

Hines, E. M., i C. C. Jacob. "Eccentric Braced Frame System Performance". W Structures Congress 2010. Reston, VA: American Society of Civil Engineers, 2010. http://dx.doi.org/10.1061/41130(369)121.

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Hines, Eric M. "Eccentric Braced Frame Design for Moderate Seismic Regions". W Structures Congress 2009. Reston, VA: American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/41031(341)86.

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Wijaya, Ming Narto, Lilya Susanti i Sonnia Syafirra. "Effect of shear stirrup space on short link beam of eccentric braced frame (EBF) V-type under cyclic loading". W PROCEEDINGS OF THE 3RD INTERNATIONAL CONFERENCE OF GREEN CIVIL AND ENVIRONMENTAL ENGINEERING (GCEE 2021). AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0072627.

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Lukačević, Ivan, Tomislav Maleta i Darko Dujmovic. "Behaviour of dual eccentrically braced steel frames with short and long seismic links". W IABSE Congress, New York, New York 2019: The Evolving Metropolis. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/newyork.2019.1673.

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<p>Dual structures obtained by combining moment resisting frames with innovative bracing systems such as replaceable shear panels or seismic links have significant advantages among conventional solutions. The major advantages of such systems are energy dissipation in the specific locations and re-centring capability which significantly reduces repair costs. On the other hand, design of such systems is driven with specific requirements such as combining different steel grades to ensure elastic behaviour of the flexible part of the system. This paper deals with comparative behaviour analyses of two dual systems combining moment resisting multi-storey frames with eccentric bracing systems. The steel frame consists of three bays with central braced frame and two adjacent moment resisting frames. The bracing system contains either long or short seismic link. Seismic energy dissipation of these systems is completely different. Long seismic links are characterised with a classical plastic hinge in which energy is dissipated through bending while in case of short seismic links seismic energy is dissipated through shear. Multi-linear plastic diagrams for both links have been defined and pushover analyses are performed. The behaviour of the analysed systems based on collapse mechanisms, overstrength ratio, target displacement and possible solutions for re-centring capabilities are discussed. Analysed system with short seismic links despite more complicated modelling and requirements for high strength steel in MRFs, results in higher overstrength ratio regarding the system with long seismic links. It is also far easier to dismantle system with short seismic links, due to the bolted connection of links with the adjacent members.</p>

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Khonsari, S. V., G. L. England, M. Moradi, H. Farahani i D. Zarei. "Experimental Investigation Into the Behaviour of a New Replaceable Bracing System". W ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/omae2012-83697.

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A new bracing system with new features somewhat different from those of the existing ones was devised and is presented. These features comprise some of the advantages of eccentric bracing systems including their ability to dissipate energy through bending of flexural elements while lacking some of the disadvantages of such systems including their inability of being replaced upon damage during events such as earthquakes, etc. While in traditional types of braces, including both concentric and eccentric ones, braces are under axial loading, in this new system they work in a bending capacity. As a result, the sort of flexibility which is introduced in the system in the presence of eccentric braces (definitely at the price of forcing the potential damage to occur and be concentrated at the girders/beams to which such braces are connected), is now provided by the braces and at the price of sacrificing them. Therefore, if the level of damage is such that the damaged element is no longer usable, the replacement of the braces is a more viable and economically justifiable than that of the girders. Moreover, since girders, as part of the deck/floor system, are normally engaged with other elements such as stringers/joists, their replacement may not be practically possible at all. Such bracing systems, called Broken Beam Bracing System (BBBS), have the potential of being used in offshore/onshore structures as originally-used elements or in a retrofit/repair capacity.

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Whittall, Thomas, i Konstantinos A. Skalomenos. "SEISMIC DESIGN OF STEEL FRAMES WITH INTENTIONALLY ECCENTRIC INDUCTION-HEAT TREATED STEEL BRACES". W 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering Methods in Structural Dynamics and Earthquake Engineering. Athens: Institute of Structural Analysis and Antiseismic Research National Technical University of Athens, 2021. http://dx.doi.org/10.7712/120121.8819.20119.

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Deng, Peng, Yingjuan Ma i Xiaotong Shang. "Research on Seismic Behavior of Semi-rigid Steel Frame Structures With Eccentric Brace". W 2015 International Conference on Advanced Engineering Materials and Technology. Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/icaemt-15.2015.161.

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Tseng, Jung-Ge, i Jonathan A. Wickert. "Vibration of an Eccentrically Clamped Annular Plate". W ASME 1993 Design Technical Conferences. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/detc1993-0260.

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Abstract Small amplitude vibration of an eccentric annular plate, which is free along its outer edge and clamped along the interior, is investigated through experimental and analytical methods. A disk with this geometry, or a stacked array in which the clamping and symmetry axes of each disk are nominally coincident, is common in data storage and brake systems applications. In the present case, the geometric imperfections on the boundary can have important implications for the disk’s dynamic response. Changes that occur in the natural frequency spectrum, the mode shapes, and the free response under eccentric mounting are studied through laboratory measurements and an approximate discrete model of the plate. The natural frequencies and modes are found through global discretization of the Kamke quotient for a classical thin plate. For the axisymmetric geometry, the natural frequencies of the “sine” and “cosine” vibration modes for a specified number of nodal diameters are repeated. With increasing eccentricity, on the other hand, each pair of repeated frequencies splits at a rate that depends on the number of nodal diameters. Over a range of clamping and eccentricity ratios, the model’s predictions are compared to the measured results.

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Sun, Jiefu, Jianning Zhu i Bihong Lu. "Research of the Brake Pad Eccentric Wear Simulation of Medium-low Speed Maglev Train Based on RecurDyn". W 2019 16th International Conference on Ubiquitous Robots (UR). IEEE, 2019. http://dx.doi.org/10.1109/urai.2019.8768693.

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Junge, Christian, Jochen Gallep, Ralf Wegener i Stefan Soter. "Simulation and verification of an eccentric press system actuated by hyraulic-clutch-brake-combination controlled by a linear drive". W 2010 IEEE Region 8 International Conference on "Computational Technologies in Electrical and Electronics Engineering" (SIBIRCON 2010). IEEE, 2010. http://dx.doi.org/10.1109/sibircon.2010.5555087.

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Raporty organizacyjne na temat "ECCENTRIC BRACED"

Al-Azzawi, Hosam. Strength Tuned Steel Eccentric Braced Frames. Portland State University Library, styczeń 2000. http://dx.doi.org/10.15760/etd.6857.

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