scholarly journals DYNAMIC ANALYSIS AND COMPARATIVE STUDY OF PLAN IRREGULAR (C-SHAPED) BUILDING WITH DIFFERENT TYPES OF BRACING SYSTEM

2021 ◽  
Vol 6 (3) ◽  
Author(s):  
Abdul Wasey Abdul Wahab ◽  
Dr. P. B. Ullagaddi
Keyword(s):  
Dynamic Analysis ◽  
Response Spectrum ◽  
Vertical Direction ◽  
Base Shear ◽  
Analysis And Design ◽  
Irregular Structures ◽  
Different Types ◽  
Story Drift ◽  
Lateral Displacements ◽  
Bracing System

When the multi-storied buildings are constructed a suitable care should be taken while designing, as they are subjected to lateral forces. The behaviour of multi-story building depends upon either in plan or in vertical direction i.e, elevation, is considered as one of the main causes of failure during earthquakes. Thus irregular structures, especially the structures which are located in seismic zones are required a special attention during analysis and design of structure. In this study Plan irregular (C-shaped building) is considered to carry out study. Bracing system is installed to provide strength against lateral loading and the behaviour of the structure in terms of base shear, story drift, stiffness and the lateral displacements are observed. Three different types of bracings X, V and Diagonal are installed in the structure. Total 4 models are analysed for 7 story height level, 4 Models are computed to determine the performance of the structure. One MRF and three models with different bracing system. And the best suitable bracing system for this study. The method used for this study is response spectrum method, to perform dynamic analysis of the structure.

scholarly journals Dynamic Analysis of Steel Silo

2020 ◽  
Vol 9 (1) ◽  
pp. 1986-1990
Keyword(s):  
Dynamic Analysis ◽  
Linear Time ◽  
Response Spectrum ◽  
Structural Response ◽  
Time History ◽  
Time History Analysis ◽  
Base Shear ◽  
Natural Period ◽  
History Analysis ◽  
Lateral Displacements

The structural response of any structure is the result of various dynamic phenomenon which lead to vibrations or shaking of the structure , depending on the duration of the ground motion, its frequency and time period. In the present work, dynamic analysis of a typical steel silo is done by using linear Time History Analysis and Response Spectrum method for earthquake Zone V as per Indian code. Two analyses are carried out namely, Time History Analysis (THA) and Response Spectrum Analysis (RSA) using STAAD.ProV8i software. The Load combinations are worked out as per IS-1893-2002. The results in terms of Fundamental natural period, Design Base shear, Lateral Displacements, are compared for the two different silo models considered in the present study.

Non-Linear Step-by-Step Seismic Response and the Push-Over Analysis Comparison of a Reinforced Concrete of Ductile Frames 15 Level Building

2008 ◽  
Vol 385-387 ◽  
pp. 229-232
Author(s):  
Jorge A. Avila ◽  
Eduardo Martínez
Keyword(s):  
Lateral Displacement ◽  
Time History ◽  
Seismic Zone ◽  
Lateral Loads ◽  
Base Shear ◽  
Non Linear ◽  
Story Drift ◽  
Lateral Displacements ◽  
Group B ◽  
Level Building

Based on a ductile frames 15 level building, a non-linear analysis with increased monotonically lateral loads (Push-Over) was made in order to determine its collapse and its principal responses were compared against the elastic and inelastic time-history seismic responses determined with the SCT-EW-85 record. The seismic-resistance design and faced to gravitational loads was made according to the Complementary Technical Norms of Concrete Structures Design (NTC-Concrete) and the NTC-Seismic of the Mexico City Code (RDF-04), satisfying the limit service states (relative lateral displacement between story height maximum relations, story drifts ≤ 0.012) and failure (seismic behavior factor, Q= 3). The compressible (soft) seismic zone IIIb and the office use type (group B) were considered. The non-linear responses were determined with nominal and over-resistance effects. The comparison were made with base shear force–roof lateral displacement relations, global distribution of plastic hinges, failure mechanics tendency, lateral displacements and story drift and its distribution along the height of the building, local and global ductility demands, etc. For the non-linear static analysis with increased monotonically lateral loads, it was important to select the type of lateral forces distribution.

scholarly journals Seismic and Time History Performance of RCC Framed Buildings with and without Passive Energy Dissipators

2020 ◽  
Vol 9 (3) ◽  
pp. 2230-2240
Keyword(s):  
Base Isolation ◽  
Lateral Displacement ◽  
Response Spectrum ◽  
Time History ◽  
Base Shear ◽  
Viscous Dampers ◽  
Fluid Viscous Dampers ◽  
Seismic Force ◽  
Energy Dissipators ◽  
Lateral Displacements

Base isolation is an effective way to protect large structures from earthquake damage. It is a costly approach, as the entire structure must be supported on elastomeric or sliding bearings. Viscous dampers distributed throughout an otherwise conventional structure can achieve the same result at a significantly lower cost. Dampers are used to resist lateral forces coming on the structure. Dampers are the energy dissipating devices which also resist displacement of Reinforced Concrete (RC) buildings during an earthquake. These dampers help the structure to reduce buckling of columns thereby increasing the stiffness of the structure. During earthquakes, multi-storeyed buildings get damaged and as a result, large deformation occurs. Dampers reduce vibration and deformation of structural elements during an earthquake. Retrofitting buildings with fluid viscous dampers (FVDs) can improve Interstorey drifts and floor accelerations. In the present study, an RC framed building is modelled and analysed under Southern Sumatra and Chile earthquakes to evaluate the performance of the structure and its elements with and without energy dissipators. For the study, a model (G+19) with and without energy dissipators is modelled in ETABS. The seismic force is applied based on the time history data of the models pertaining to Southern Sumatra and Chile Earthquake. Response Spectrum analysis has been carried out to find the lateral displacements, storey shear and Base shear for the model with and without dampers. The lateral displacement, storey drift, storey shear and Base shear are found to less for the model with Linear FVDs when compared to the model with Non-Linear FVDs and without FVDs.

scholarly journals Analisa Perilaku Bangunan Tidak Beraturan Secara Horizontal Dengan Dilatasi Terhadap Gempa

2019 ◽  
Vol 14 (2) ◽  
Author(s):  
Masnawari Rahmadani ◽  
Ririt Aprillin ◽  
Eka Murtinugraha
Keyword(s):  
Spectrum Analysis ◽  
Response Spectrum ◽  
Base Shear ◽  
Response Spectrum Analysis ◽  
Existing Building ◽  
Building Model ◽  
Story Drift ◽  
Building Form ◽  
Building Condition

The building model was made by using ETABS’s software version 9.7.1. Method that was used for earthquake analysis was response spectrum analysis. Result of this research showed that application of two columns dilatation produced different structure behavior when it applied on lengthways direction (X) and breadthways direction (Y) of existing building. Dilatation variation that was given on lengthways direction (X) of building produced better behaviors. More regular building form because of dilatation on lengthways direction (X) produced shorter period with bigger base shear. Along with the base shear that accepted by building, the column momen also became bigger. Based on displacement that was produced, application of dilatation on lengthways direction was influenced by re-entrant corner. Configuration of more regular building that has close re-entrant corner to existing building condition produced displacement that close to the existing, that thing was also in line with story drift that was produced. The displacement that was produced by all dilatation variation was still in safe category according to SNI 03-1726-2012. The biggest displacement that happened on X and Y direction was produced by variation 1 as big as 0.824m and 0.817m in a row.

scholarly journals Study on Dynamic analysis of Diagrid and Outrigger Structures Subjected to Seismic and Wind Load

2021 ◽  
Vol 9 (VII) ◽  
pp. 2813-2828
Author(s):  
Sharath Kumar N
Keyword(s):  
Wind Loads ◽  
Seismic Loads ◽  
Live Load ◽  
Structural Members ◽  
Floor Plan ◽  
Base Shear ◽  
Dead Load ◽  
Modeling And Analysis ◽  
Analysis And Design ◽  
Story Drift

A Comparative study of G+30 story regular, diagrid, outrigger structure is presented. A square shaped floor plan of 18 m × 18m size was considered. ETABS 2016 was used in modeling and analysis of structural members. All structural members were designed as per IS 456:2000, load combinations such as dead load, live load, earthquake and wind loads were considered for analysis and design of the structure. Later Regular, Diagrid and outrigger structural systems were compared; the key results like Base shear, story displacement and story drift are obtained. It is found that diagrid system is efficient in resisting seismic loads and outrigger system is found efficient in resisting wind loads.

scholarly journals A Review on Seismic Performance of L-Shaped Building Through Plan Irregularities

2021 ◽  
pp. 251-257
Author(s):  
Yash Chhatani ◽  
Prashant Y Pawade ◽  
Kuldeep R Dabhekar ◽  
Isha P Khedikar
Keyword(s):  
Enhancement Factor ◽  
Feasible Solution ◽  
Ground Movement ◽  
Base Shear ◽  
Structure Development ◽  
Abrupt Changes ◽  
Different Types ◽  
Story Drift ◽  
Overturning Moment ◽  
Dynamic Investigation

The patterns of sporadic structure development have quickly expanded because of tasteful and restricted accessibility of land. Past examinations have indicated that the structures with design abnormality are harmed under solid ground movement. Auxiliary inconsistencies are significant elements which decline the seismic exhibition of the structures. Structures having basic anomalies bring about the lopsided circulation of the story float, exorbitant twist, etc. The irregularity discussed here are about plan irregularity which is available in re-participant corners and torsional anomaly which is caused by abrupt changes in firmness and twist enhancement factor in building. This study is to propose a feasible solution to build this kind of structure in seismically active areas using analytical methods with the assistance of ETABS software. The analysis shall be done through a comparable static horizontal power technique and reaction range examination (dynamic investigation). The basic reactions will estimated regarding story displacement, inter-story drift ratio, torsional irregularity ratio, torsional diaphragm rotation, normalized base shear force, and overturning moment, which are also called seismic response demands. The structure will be analyzed and compare with different types of other shape plan.

scholarly journals COMPARISON OF ANALYSIS BETWEEN RECTANGULAR AND CIRCULAR OVERHEAD WATER TANK

2021 ◽  
Vol 2 (02) ◽  
pp. 77-95
Author(s):  
Latha M S
Keyword(s):  
Public Utility ◽  
Live Load ◽  
Water Tank ◽  
Lateral Loads ◽  
Base Shear ◽  
Analysis And Design ◽  
Working Stress ◽  
Story Drift ◽  
Shear Area ◽  
Comparison Of The Results

Water tank is a container used for the storing of liquids and they are classified based on shape and location. The overhead tank is an important and it is very common public utility structure. The study predicts the analysis and design of the rectangular and circular overhead water tank using ETABS software. The water tank is modeled and analyzed by using dynamic analysis to resist lateral loads and design is made using working stress method manually. Dead load, live load, wind load and seismic loads are applied based on IS codes. The behavior of structure for the parameters like Story drift, displacement, stiffness, deflection, storey shear, base shear, area of steel and hoop tension for circular and rectangular water tank are studied and then comparison of the results is made between circular and rectangular overhead water tank. By this study we say that the circular water tank is suitable for larger capacity and rectangular is suitable for smaller capacity and it is economical for larger capacity.

scholarly journals Vibration control of steel frames with setback irregularities equipped with semi-active tuned mass dampers

2021 ◽  
Author(s):  
Seyed Amin Hosseini ◽  
Vahid Jahangiri ◽  
Ali Massumi
Keyword(s):  
Vibration Control ◽  
Control Systems ◽  
Structural Vibration ◽  
Base Shear ◽  
Tuned Mass Dampers ◽  
Steel Moment Resisting Frames ◽  
Irregular Structures ◽  
Story Drift ◽  
Moment Resisting ◽  
Control Devices

Abstract Vibration control of structures has been a focus of research worldwide. Although, several studies have examined the efficiency of semi-active tuned mass dampers (SATMDs) to control the seismic vibration of structures, only a few have focused on the influence of SATMDs on steel moment resisting frames in irregular structures having setbacks. In the current investigation, the use of SATMDs for the vibration control of structures with setbacks subjected to earthquake records has been evaluated. In order to assess the nonlinear seismic performance of buildings with setbacks, the inter-story drift ratio, story displacement, and base shear factor were examined as engineering demand parameters. The results reveal that the use of SATMDs reduced the seismic response of regular and irregular frames with setbacks. However, the use of these control devices requires more attention for structures with significant setbacks because, in some cases, the response of a structure with SATMDs can be greater than of an uncontrolled structure. The investigations also showed that placement of the control systems at the highest (top) level of the structure significantly reduced the structural vibration of both types of structure.

scholarly journals Comparative Analysis Study Of ATC-40 and SNI 1726-2012 Guidelines for Beam Structure Performance and Column Trans Studio Apartments Applications Using Dynamic Response Spectrum Analysis Methods

2019 ◽  
Vol 1 (1) ◽  
pp. 46-55
Author(s):  
Agyanata Tua Munthe ◽  
Abdul Gafur
Keyword(s):  
Dynamic Analysis ◽  
Response Spectrum ◽  
Spectral Response ◽  
Response Analysis ◽  
Building Structures ◽  
Base Shear ◽  
Maximum Displacement ◽  
Response Dynamic ◽  
Earthquake Force ◽  
Dynamic Time

The earthquake that often hit Indonesia caused thousands of lives and caused damage to buildings. These earthquakes often occur because Indonesia is in two regions, namely the Pacific earthquake path (Circum Pacific Earthquake Belt) and the Asian earthquake lane (Trans Asiatic Earthquake Belt). Earthquake disasters cause damage to building structures. When an earthquake occurs, it is expected that the building can accept earthquake force at a certain level without significant damage to its structure. In general, earthquake analysis is divided into two major parts, namely static earthquake analysis and dynamic earthquake analysis. In buildings that are very high, irregular, multilevel, and buildings that require enormous accuracy are used dynamic analysis planning, which consists of a variety of spectral response analysis and dynamic time response dynamic analysis. This study aims to determine the building's security in terms of displacement, drift, and base shear. The method used is a dynamic analysis of the response spectrum using the ETABS program. The maximum total drift in the X direction is 0.0200475 m and in the Y direction is 0.020405 m, so the building is safe against ultimate boundary performance (0.02h) and service boundary performance {(0.03 / R) x h}. So that the displacement in the building does not exceed the maximum displacement, the building is safe from earthquake plans.

scholarly journals Response analysis of a multi-story building structure with a variety of horizontal irregularities and shear wall geometries

2021 ◽  
Vol 933 (1) ◽  
pp. 012008
Author(s):  
A H Prathama ◽  
M Teguh ◽  
F Saleh
Keyword(s):  
Urban Areas ◽  
Response Spectrum ◽  
Structural Models ◽  
Shear Walls ◽  
Shear Wall ◽  
Response Analysis ◽  
Base Shear ◽  
Drift Ratio ◽  
Story Drift ◽  
Story Building

Abstract The growing growth of human activities has led to changes in housing patterns in urban areas. The land crisis in urban areas has made land prices uneconomical, so buildings are designed vertically. One solution to resist earthquakes in multi-story buildings is to add a shear wall structure with the proper profile and layout. Shear wall designs with variations influence the base shear, drift ratio, lateral deflection, and story drift patterns. This study presents the structural response comparison of buildings against variations in the profile and layout of shear walls subjected to earthquake loads. Force Based Design method utilizing the response spectrum approach was adopted in the analysis and carried out using SAP200. Six structural models comprise a frame without shear walls, three L-profile shear walls, two I-profile (straight) shear walls. The simulation results of the overall structural models show that the profile and layout configuration of shear walls in the frame structure of a multi-story building correlates directly to the performance of base shear, drift ratio, and story drift with relatively comparative conditions.

Sign in / Sign up

Export Citation Format

Share Document