scholarly journals Study of Structural Irregularities in different Seismic Zones using Response Spectrum Analysis

2021 ◽  
Vol 9 (8) ◽  
pp. 1410-1417
Author(s):  
Vedant Kale
Keyword(s):  
Spectrum Analysis ◽  
Response Spectrum ◽  
Three Dimensional ◽  
Lateral Force ◽  
Lateral Loading ◽  
Seismic Load ◽  
Response Spectrum Analysis ◽  
Seismic Zones ◽  
Stress Resultant ◽  
Structural Irregularities

Abstract: The Indian Standard code IS-1893: 2002 (Part-I) defines various types of structural irregularities. The code suggests a special approach of study for irregular structures. The earthquake effect leads to the damage the property and many people loss their life. So, we've to understand the structural performance under seismic load before construction. In this study varying plan irregularities which are often inevitable thanks to building requirements and architectural imperatives, and having a serious impact on building costs are investigated. The objective of the project is to carry out Response spectrum analysis of two RCC buildings is to be done in four different seismic zones of India (i.e., Zone-2, Zone-3, Zone-4, Zone-5). ETABS model of G+10 RCC with Varying Geometry plan is considered in this analysis. The analysis is done using Extended Three-Dimensional Analysis of Building System software. Various response parameters like lateral force, story drift, Displacement are often determined. The evaluation of response of structures subjected to lateral loading with the help of frequency and the magnitude of stress resultant, is also included in the scope of this paper. Keywords: Plan irregularity, Vertical geometric irregularities Response spectrum method, ETABS, Structural Irregularities, Lateral Loading, Non-Linear Analysis, Storey Drift, Storey Displacement.

Response Spectrum Analysis of a Large-Span Hangar Subjected to Multi-Dimensional Seismic Inputs

2013 ◽  
Vol 639-640 ◽  
pp. 906-910
Author(s):  
Yang Xu ◽  
Jun Zhao ◽  
Xiao Yan Xu ◽  
Dan Zhu
Keyword(s):  
Spectrum Analysis ◽  
Response Spectrum ◽  
Three Dimensional ◽  
Analysis Method ◽  
Response Spectrum Analysis ◽  
Roof Structure ◽  
Internal Forces ◽  
Primary Direction ◽  
Lateral Displacements ◽  
2D And 3D

The multi-dimensional seismic response of a single-span hangar was studied by response spectrum analysis method. The lateral displacements of the structure, forces of its supporting columns and its roof structure were calculated and compared with each other for cases of one-, two- and three-dimensional (1D, 2D and 3D) seismic inputs. The results show that, compared with the case of 1D earthquake input, the effects of horizontally 2D earthquake inputs on the internal forces and displacements of its supporting columns in the primary direction of input are obvious when it is along the symmetrical axis of the hangar and their effects in the secondary direction of input are even more important which results in great increases of the internal forces and displacements in that direction. The vertical seismic input has almost no effect on the internal forces and displacements of columns. The internal forces in different parts of the roof structure are controlled by horizontal or vertical inputs, respectively, and, compared with those from horizontally or vertically 1D inputs, the responses from 3D inputs are increased and the effects should be considered in seismic design.

Investigation on the Effect of Infilled Walls Utilizing Response Spectrum Analysis for Steel Staggered-Truss System

2012 ◽  
Vol 152-154 ◽  
pp. 34-39
Author(s):  
Qing Sheng Guo ◽  
Qing Shan Yang
Keyword(s):  
Spectrum Analysis ◽  
Earth Quake ◽  
Simulation Analysis ◽  
Response Spectrum ◽  
Steel Structure ◽  
3D Models ◽  
Structure Design ◽  
Seismic Load ◽  
Base Shear ◽  
Response Spectrum Analysis

Considering the structure type of the steel staggered-truss (SST) system, the effect of infilled walls will be major and need to be studied amply, some scientific design regulations need to be found for referrence. Based on two different 3D models considering or ignoring the stiffness of infilled walls (SIW), a numerical investigation is presented on the structural behaviors of the SST system utilizing the finite element 3D simulation analysis soft ware ETABS. The longitudinal structure is asymmetrical due to the SIW, it causes the torsion forces in the building. Comparing to the different results of response spectrum analysis, including storey drift and equivalent base shear under frequent earth quake and rare earth quake, some conclusions were made, including the capacity of the SST system under seismic load and the effect of the SIW for SST system. The increased base shear force factors due to the effect of the SIW were suggested for SST structure design, it is different from the other steel structure types.

Seismic Analysis of a Water Release Integrated Structure Part I: Response Spectrum Analysis of Intake Tower

2013 ◽  
Vol 470 ◽  
pp. 938-941
Author(s):  
Yong Wang ◽  
Zhen Ting Lin ◽  
Chao Song ◽  
Bo Ya Dong
Keyword(s):  
Spectrum Analysis ◽  
Seismic Analysis ◽  
Response Spectrum ◽  
Three Dimensional ◽  
Safety Evaluation ◽  
Response Spectrum Analysis ◽  
Water Release ◽  
Dimensional Finite Element ◽  
Earthquake Load ◽  
Three Dimensional Finite Element

The stress, deformation and stability for the intake tower of a water release integrated structure under the normal storage water level and operational basis earthquake load case are investigated using the three dimensional finite element method. The response spectrum analysis is adopted to study the seismic response of the intake tower. Special attention is paid to the weak zones of the structure and foundation. The safety evaluation of the intake tower is performed based on the computational results.

scholarly journals Comparative Study of RC Multistorey Building with Floating Column and Shear Wall Subjected To Seismic Load

2021 ◽  
Vol 9 (9) ◽  
pp. 528-535
Author(s):  
Akshay Gajbhiye
Keyword(s):  
Spectrum Analysis ◽  
Response Spectrum ◽  
Shear Wall ◽  
Seismic Load ◽  
Base Shear ◽  
Response Spectrum Analysis ◽  
Soft Storey ◽  
Analysis And Design ◽  
Earthquake Zone ◽  
The Impact

Abstract : In modern multistorey building construction, irregularities like the soft storey, vertical and plan irregularities, floating columns etc are very common. Building with an open ground storey for parking is a common feature that results in floating columns. Floating columns provide column free space and a good aesthetic architectural view of the building. floating column means the end of any vertical element that rests on the beam which leads to discontinuity of columns such that the path of load distribution in multi-storey buildings is disturbed. The use of a floating column also tends to increase the moment in the column, storey shear etc which highly undesirable in seismically active areas. So, the study of the best location where the floating column needs to be provided to reduce the impact due to seismic loads is of primordial importance. Shear wall is a vertical member which is provided from foundation to top storey. In this study shear wall is used in the direction of orientation so that it provides additional strength and stiffness to the buildings. In the present analysis, 8 models are studied. The first model considers a multi-storeyed building without any shear wall and floating column. Other models analysed are with shear wall and by varying the location of floating columns. The analysis and design are done by STAAD.pro V8i SS6 version software and the method used is response spectrum analysis in earthquake zone 4. The effect of floating column location on parameters such as Base shear, Displacement, Maximum moment, storey shear and percentage of steel reinforcement are discussed. The comparison of results of different models is also carried out in detail using graphs and bar charts in this study. The suitable location for providing a floating column with the shear wall is also discussed. Keywords: Floating column, Shear wall, Seismic load, STAAD.pro.v8i, Response Spectrum Analysis.

ANALISIS BEBAN GEMPA TERHADAP KEKUATAN STRUKTUR BANGUNAN MULTI DEGRRE OF FREEDOME

2015 ◽  
Vol 1 (1) ◽  
pp. 17
Author(s):  
Almufid Almufid
Keyword(s):  
Spectrum Analysis ◽  
Response Spectrum ◽  
Lateral Force ◽  
Response Strength ◽  
Lateral Loads ◽  
Base Shear ◽  
Response Spectrum Analysis ◽  
Rolling Moment ◽  
Loads Analysis ◽  
Almost All

Structural analysis is planned phases of a building, especially the high buildings. In the analysis of the structure required to facilitate the modeling calculations reflect actual conditions in the field, both in structure and in the loaded . Because almost all parts of Indonesia, including the earthquake-prone areas is a challenge for civil engineering planning in order to design earthquakeresistant buildings. Indonesia has many experienced tremendous earthquake  Writing this proposal is intended to be able to know the strength and structure of the response Strength multi degree of freedome, on soft ground, located in Tangerang when worn earthquake lateral loads, analysis is done with the help of the SAP program in 2000 ver.15, to get the style - the style such as: the base shear force, lateral force level, rolling moment and lateral deviation. Dynamic analysis was conducted using the response spectrum analysis, mass modeling performed with a lump mass models, the sum of the response variance is reviewed with some combinations, such as: CQC, SRSs and  ABSSUM. Keywords: Building Multi Degrre of Freedome, response spectrum analysis, dynamic loads, with the use of the method;   CQC,    SRSS, ABSSUM

Comparison of eigenanalysis and Ritz vector approaches for response spectrum analysis of soil-pile-bridge systems

2021 ◽  
Vol 17 (3-4) ◽  
pp. 89-100
Author(s):  
M. Davidson ◽  
A. Patil ◽  
S.A. Rosenfeld ◽  
Z. Zhu
Keyword(s):  
Spectrum Analysis ◽  
Soil Structure ◽  
Response Spectrum ◽  
Active Regions ◽  
Ritz Vector ◽  
Response Spectrum Analysis ◽  
Fixed Base ◽  
Potential Benefits ◽  
Eigenvectors And Eigenvalues ◽  
Vector Approach

Frequency-based analysis techniques such as response spectrum analysis (RSA) are widely used for designing bridges in seismically active regions. Two well-known analysis procedures that underlie RSA are the solution of the eigenproblem and the approximation of the solution to the eigenproblem (i.e., approximation of eigenvectors and eigenvalues) through use of force-dependent Ritz vectors. While frequency-based methods have achieved widespread adoption in practice, certain simplifications remain common, such as neglecting soil-structure interaction (SSI) due to a fixed-base assumption. In the present study, frequency-based techniques packaged within a research version of a design-oriented computational tool are employed to analyze, assess, and compare results obtained from RSA with use of the eigenanalysis, and separately, Ritz vector approaches. Importantly, for the bridge configurations analyzed, SSI is taken into account. As outcomes, the potential benefits of the Ritz vector approach (as well as modeling strategies) are demonstrated. The study outcomes are intended to aid practicing engineers when the need to account for SSI is recognized as pertinent to a given bridge seismic design application.

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