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Study on High-rise Structure with Oblique Columns by ETABS, SAP2000, MIDAS/GEN and SATWE

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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

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    • توسط admin
      Influence of Aspect Ratio & Plan Configurations on Seismic Performance of Multistoreyed Regular R.C.C. Buildings: An Evaluation by Response Spectrum Analysis
      Sanjay Kumar Sadh 1, Dr. Umesh Pendharkar 2 1 M.E.(CASDD) Student, Civil Engineering Department, U.E.C. Ujjain, M.P., INDIA 2 Professor Civil Engineering Department, U.E.C. Ujjain, M.P., INDIA
      Abstract - The behavior of a building during earthquakes depends critically on its overall shape, size and geometry. Earthquake resistant design of buildings depends upon providing the building with strength, stiffness and inelastic deformation capacity which are great enough to withstand a given level of earthquakegenerated force. This is generally accomplished through the selection of an appropriate building configuration and the careful detailing of structural members. Configuration is critical to good seismic performance of buildings. The important aspects affecting seismic configuration of buildings are overall geometry, structural systems, and load paths. The building slenderness ratio and the building core size are the key drivers for the efficient structural design. This paper focuses on the effect of both Vertical Aspect Ratio (H/B ratio i.e. Slenderness Ratio) and Horizontal or Plan Aspect Ratio (L/B ratio), where H is the total Height of the building frame, B is the Base width and L is the Length of the building frame with different Plan Configurations on the Seismic Analysis of Multistoried Regular R.C.C. Buildings. The test structures are kept regular in elevation and in plan .Here, height and the base dimension of the buildings are varied according to the Aspect Ratios. The values of Aspect Ratios are so assigned that it provides different configurations for Low, Medium and High-rise building models. In the present study, four building models having different Horizontal Aspect ratios viz. 1, 4, 6 & 8 ranging from 12m.to 96m.length of different Vertical Aspect ratios (slenderness ratios) viz. 1, 4, 6 & 8 of varying 4, 16, 24 & 32 storeys have been considered and their influence on the behavior of the RCC Multistoreyed buildings is demonstrated, using the parameters for the design as per the IS-1893- 2002-Part-1 for the seismic zone- 3. In this way total 16 building models are analyzed for different load combinations by Linear Elastic Dynamic Analysis (Response Spectrum analysis) with the help of ETABS-2015 software and the results obtained on seismic response of buildings have been summarized.

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    • توسط admin
      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
       
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    • توسط admin
      فیلمهای آموزش نرم افزار SAP2000 مربوط به سایت csi
      برای دانلود یا مشاهده این فیلمها به
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      01 Introductory Tutorial
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      03 Draw Commands
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      04 Mass and Modal Analysis
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      05 P-Delta Analysis
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      06 Nonprismatic Sections
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      07 Interactive Database Editing
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      08 Area Edge Constraints
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      09 Tension-only Bracing
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      10 Response Spectrum Analysis
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      11 Modal Time History Analysis
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      12 Section Designer
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      13 Cardinal Points
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      14 Displaying Tabular Data
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      15 Creating Reports
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      16 Cable Objects
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      17 Tendons
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      19 Nonlinear Staged Construction
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      20 Nonlinear Shear Walls
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      21 Static Pushover Analysis
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      22 Power Spectral Density
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      23 Wave Loading
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      24 Model Alive
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      25 Open Application Programming Interface
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      26 CSiLoadOptimizer
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      27 Buckling Factors and Modes
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      28 Varying Mass in Seismic Analyses
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      29 Fast Nonlinear Analysis
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      30 Web Activated Licensing
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    • توسط admin
      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.


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    • توسط admin
      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.
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