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Study on High-rise Structure with Oblique Columns by ETABS, SAP2000, MIDAS/GEN and SATWE مطالعه و مقایسه ای جالب از «ستونهای مایل در سازه های بلند» بوسیله نرم افزارهای مختلف سازه منبع @Civilbest - Oblique Columns.pdf

محاسبه سازه های صنعتی برای بارهای زلزله Industrial Building Design on Seismic Issues Swapnil N. Dhande1, Y. R. Suryawanshi2, Pravin S. Patil3 P. G. Student, Department of Civil Engineering, Imperial College of Engineering and Research, Wagholi , Pune, India1 Assistant Professor, Department of Civil Engineering, Imperial College of Engineering and Research, Wagholi , Pune, India2 Assistant Professor, Department of Civil Engineering, A.I.S.S.M.S. College of Engineering, Pune, India3 ABSTRACT: The structural system of the building has to support the lateral loads due to earthquake and wind in addition to gravity loads. A lateral load develops high stresses and produces sway causing vibration and drift. If the buildings are not designed to resist the lateral loads, then they may be collapse resulting into the loss of life or its content. Therefore it‟s important for the structure to have not only sufficient strength against gravity loads but also the adequate stiffness to resist lateral forces. Literature review reveals that LLRSS (Lateral load Resisting structural system) is provided in the form of devices like base isolation and dampers which controls the seismic vibration and lateral drift. But these devices are very costly and effective only for high rise buildings. Hence there is a need to study the LLRSS or technology suitable for a particular height of building. The objective of this research is to propose simple but innovative and effective LLRSS or structural technology and methodology for the seismic control which can be used in new as well as old building structures. It is reviewed that since North earthquake (1994), concentrically braced steel frame has gained the popularity as a LRSS in the seismic areas. In spite of increasing popularity, analytical study of braced frame structure and its detailed requirement to control the seismic response is limited in India. Also RC building involves heavy dead load due to large member size which intern is more prompt for seismic loss. Hence, it is proposed to study the response of steel buildings/frames with different types of steel bracings configurations as a LLRSS to control the vibration and storey drift. The structural response parameters selected for the study are time period, natural frequency, and roof displacement. The research work deals with the parametric study of response of Non-linear time history analysis (NLTHA) of 3D industrial steel buildings braced with different bracing configurations using software (Sap-2000) under Bhuj earthquake. The bracing configuration used are SDB, CDB, VVB and INVB in concentric bracing to suggest suitability of particular bracing configurations for the stability of the building structure under seismic loading. KEYWORDS: Seismic behaviour, Linear and non linear time history analysis, Response spectra, Bracing system. International Journal of Innovative Research in Science, Engineering and Technology (An ISO 3297: 2007 Certified Organization) Vol. 4, Issue 5, May 2015 به نقل از کانال تلگرام فایلهای انجمن سازه های فولادی ایران دانلود از پیوست 27_INDUSTRIAL.pdf

A methodology for Determining the Seismic Vulnerability of Old Concrete Highway Bridges by Using Fragility Curves Araliya Mosleh; jose jara; Humberto Varum Past earthquakes have demonstrated that old RC bridges may be seismically vulnerable. Bridge responses during the last decades illustrated the necessity of the seismic assessment of bridges especially those which were designed with old codes. In this research an existing concrete bridge representative of the most common bridges in the highway system in Iran are studied. Push over and nonlinear time history analyses using refined 3-D structural models are performed for each sample. Bridge structural systems are identified and quantified to establish a set of earthquake-site-bridge samples. The superstructure was assumed to remain elastic and the nonlinear behavior in piers was modeled by assigning plastic hinges in columns. The soil flexibility was considered by using elastic spring elements. Displacement ductility and peak ground acceleration (PGA) were selected as seismic performance indicator and intensity measure, respectively. Ten time history records from the past earthquakes were selected. They were scaled and applied incrementally to the 3-D model to evaluate seismic performance of the bridge. Furthermore, bridge damage states were defined and the probabilistic characteristics of structural capacity corresponding to each damage state were established. Then, the conditional probabilities of specific structural demand to exceed the structural capacity were computed and the results were displayed as fragility curves. منبع دانلود JSEG331427657400.pdf

Study on Steel Plate Shear Wall (SPSW) with Cutout During Seismic Excitations International Journal of Science and Research (IJSR) ISSN (Online): 2319-7064 Volume 4 Issue 8, August 2015 www.ijsr.net Asheena Sunny1, Kavitha P.E.2 1(M.Tech Student, Civil Department SNGCE, Ernakulam, Kerala, India) 2(Assoc. Professor, Civil Department, SNGCE, Ernakulam, Kerala, India) Abstract: Steel plate shear wall (SPSW) is rapidly gaining popularity as a very effective lateral load resisting system in highly seismic areas. This system consists of steel infill plate surrounded by boundary beams and columns. Steel plate shear wall has high initial stiffness and very effective in reducing the lateral displacement of structures. In some situations existence of cutouts are unavoidable due to architectural reasons, structural reasons and/or installed heating and cooling systems on the walls. Cutouts in the steel infill plate leads to a decrease in lateral load resisting capacity and improper functioning of the systems and also results in an intense variation in stress distribution. In this paper, the effect of variation in cutout size and cutout shape in steel plate shear wall has been studied by performing time history analysis. The effect of these variables on displacement and stress distribution was analysed and discussed. Keywords: Steel plate shear wall, Time history analysis, Drift limitation, Cutout , Displacement. دانلود: [Hidden Content] SUB157811.pdf

Evaluating the Conventional Pushover Procedures for Estimating the Seismic Performance of Steel Plate Shear Walls Original Article, D4 Behforooz B., Memarzadeh P. and Behnamfar F Journal. Civil Eng. Urban. 4(1): 19-27. 2014 ABSTRACT:The seismic performance demands of steel plate shear wall (SPSW) are estimated through the conventional pushover procedures. Reliability of the pushover analysis is verified through nonlinear time history analysis (NTHAs) on 9-, 6- and 3-story SPSW frames subjected to seven scaled earthquake records according to ASCE/SEI 7-05 provisions. Story drifts, displacements and story shears are the main parameters studied. A relatively accurate estimation is observed by pushover procedures compared to NTHAs. The accuracy of estimation shows an increase with respect to the height. Keywords:Steel plate shear wall; conventional pushover analysis; nonlinear time history analysis منبع: [Hidden Content] دانلود: [Hidden Content].,14-04-19-27.pdf J. Civil Eng. Urban.,14-04-19-27.pdf