scholarly journals Seismic Effect of Regular and Irregular RC Building with and Without Infill Frames using ETABS

2020 ◽  
Vol 8 (5) ◽  
pp. 2203-2207
Keyword(s):  
Lateral Displacement ◽  
Pushover Analysis ◽  
Seismic Loading ◽  
Seismic Effect ◽  
Rc Buildings ◽  
Seismic Behaviour ◽  
Normal Frame ◽  
Rc Building ◽  
Better Than

This work is on the seismic behaviour of regular and irregular RC buildings with and without infill frames. It's below stood that buildings that are regular in plan (regular building) perform far better than those which have irregularity in plan (irregular building) under seismic loading. Irregularities don't seem to be avoidable in construction of buildings. This method of analysis is projected in terms of equivalant statics, responce spectrum and pushover analysis consistant with IS 1893:2002(part 1) code. Results of those analyses are mentioned in terms of the bottom construction drift and storey stiffness. From these results it's finished that laterel displacement and construction drift are going to be a lot of in vacant frame compare with the infill frames, whereas the bottom shear are going to be less in normal frame compare with the infill frames. It is also observed that lateral displacement and story drifts are more in irreguler buildings than reguler buildings.

scholarly journals Seismic Behavior of RC Buildings with Effect of Staircase and Elevator Core Wall

2019 ◽  
Vol 8 (4) ◽  
pp. 3821-3826
Keyword(s):  
Response Spectrum ◽  
Vital Role ◽  
Base Shear ◽  
Rc Buildings ◽  
Opposite Edge ◽  
Seismic Behaviour ◽  
Response Spectrum Analysis ◽  
Building Model ◽  
Opposite Position ◽  
Better Than

Staircase and elevator are the main structural components in multi-story buildings to enable access to different floor levels. In many Multi-storey buildings staircase and elevator core wall are located at different positions as per the benefits of structure plan and user. The position of the staircase and elevator core wall plays a vital role and changing the position of the stair case and core wall leads torsional irregularity in the plan regular building. The torsion in a building occurs because of eccentricity in the mass and stiffness distributions. The staircase and core wall is an integral part of the building, and its position may change the dynamic characteristic of regular plan building. In this paper, an attempt is made to understand the seismic behaviour of RC buildings with the effect of staircase and elevator core wall with changing position. Six models of 5 storey RC buildings with different positions of staircase and elevator core wall, i.e. ideal frame, Centre, Corner, Edge-Opposite, Edge-Adjacent and Corner with cantilever or balcony are considered. The modelling and analysis is done using ETABS v17. The response spectrum analysis and Modal analysis is performed, and Results of storey displacements, storey drift, storey shear, storey stiffness, base shear and torsion irregularity are discussed. From the results, it can be observed that building model with an edge-opposite position of staircase and elevator core wall performs better than other building model and torsion for it came within the code suggested ratio of 1.2.

Determination of Seismic Role of Non-Structural Components On Earthquake Behaviour of RC Buildings Using Various Seismic Design Codes And Fault Distances

2021 ◽  
Author(s):  
Memduh Karalar ◽  
Murat Çavuşli ◽  
Necati Mert
Keyword(s):  
Three Dimensional ◽  
Eurocode 8 ◽  
Structural Elements ◽  
Structural Components ◽  
Rc Buildings ◽  
Seismic Behaviour ◽  
Rc Structures ◽  
Earthquake Performance ◽  
Rc Building ◽  
Building Engineering

Abstract Performance-based building engineering requires the synchronization of performances between non-structural and structural components. However, non-structural components are not generally taken into account in structural modelling. In this study, it is aimed to examine the seismic damage effects of non-structural components (NCs) on earthquake performance of RC buildings. For this purpose, 5 multi-story RC building collapsed in a strong earthquake is modelled as three dimensional (3D) using SAP2000 software. Brick, bookcase, bedroom, armchair, washing machine, dish washer, refrigerator is selected as NC in 3D analyses. NCs are modelled as anchored and unanchored to RC building and these NCs are modelled in the RC building taking into account UBC 2018, IBC 2018, ASCE/SI 7-30 code, New Zealand code, and Eurocode 8 code. Considering these standards for anchored / non-anchored / non-NC situations, earthquake analyses are performed separately for far fault and near fault. According to 3D nonlinear seismic analyses, it is clearly seen that NCs strongly affect earthquake behaviour of RC buildings. Besides, it is strongly recommended that non-structural elements should not be ignored while modelling a RC building. Then, it is understood that anchoring or not anchoring non-structural elements to RC structures seriously changes nonlinear seismic behaviour of these structures.

scholarly journals Behaviour of Multi-Storey RC Building Under Seismic Load Using Pushover Analysis

2021 ◽  
Vol 1197 (1) ◽  
pp. 012012
Author(s):  
Malek Abdullah ◽  
Preeti Kulkarni
Keyword(s):  
Finite Element ◽  
Structural Analysis ◽  
Spectrum Analysis ◽  
Pushover Analysis ◽  
Element Model ◽  
Seismic Load ◽  
Seismic Loads ◽  
Analysis Method ◽  
Rc Buildings ◽  
Rc Building

Abstract The current work investigates the behavior of a multi-story RC building under seismic load using pushover analysis, employing two (codes IS code and ACI code) where the special moment resistant frame (SMRF) building is located in a medium-seismicity region of India in Pune City. The G+8 to G+20 storeys of the RC buildings have been chosen for this purpose. The structural analysis programmed SAP2000.V20 was used to create a finite element model of the structure. The different models (5 models) of RC buildings were initially designed to resist seismic loads using the responses spectrum analysis method to determine the RC building’s characteristics. Pushover analysis is used to predict potential weak areas in the structure by tracking the sequence of damages of each and every member in the structure and determining the weak joints (critical joints) in the RC building. and compare the two codes (IS code and ACI code)

scholarly journals Comparison of Novel Seismic Protection Devices to Attenuate the Earthquake Induced Energy

Actuators ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 73
Author(s):  
Osman Hansu ◽  
Esra Mete Güneyisi
Keyword(s):  
Lateral Displacement ◽  
Time History ◽  
Seismic Protection ◽  
Base Shear ◽  
Seismic Demands ◽  
Nonlinear Time History Analyses ◽  
History Of ◽  
Protection Devices ◽  
Nonlinear Time History ◽  
Better Than

This study addresses an alternative use of viscous dampers (VDs) associated with buckling restrained braces (BRBs) as innovative seismic protection devices. For this purpose, 4-, 8- and 12-story steel bare frames were designed with 6.5 m equal span length and 4 m story height. Thereafter, they were seismically improved by mounting the VDs and BRBs in three patterns, namely outer bays, inner bays, and all bays over the frame heights. The structures were modeled using SAP 2000 software and evaluated by the nonlinear time history analyses subjected to the six natural ground motions. The seismic responses of the structures were investigated for the lateral displacement, interstory drift, absolute acceleration, maximum base shear, and time history of roof displacement. The results clearly indicated that the VDs and BRBs reduced seismic demands significantly compared to the bare frame. Moreover, the all-bay pattern performed better than the others.

scholarly journals Application of ANN to evaluate effective parameters affecting failure load and displacement of RC buildings

2009 ◽  
Vol 9 (3) ◽  
pp. 967-977 ◽  
Author(s):  
M. Hakan Arslan
Keyword(s):  
Failure Load ◽  
Back Propagation ◽  
Load Level ◽  
Effective Parameters ◽  
Rc Buildings ◽  
Building Stock ◽  
Capacity Curves ◽  
Rc Building ◽  
Failure Loads ◽  
Turkish Earthquake Code

Abstract. This study investigated the efficiency of an artificial neural network (ANN) in predicting and determining failure load and failure displacement of multi story reinforced concrete (RC) buildings. The study modeled a RC building with four stories and three bays, with a load bearing system composed of columns and beams. Non-linear static pushover analysis of the key parameters in change defined in Turkish Earthquake Code (TEC-2007) for columns and beams was carried out and the capacity curves, failure loads and displacements were obtained. Totally 720 RC buildings were analyzed according to the change intervals of the parameters chosen. The input parameters were selected as longitudinal bar ratio (ρl) of columns, transverse reinforcement ratio (Asw/sc), axial load level (N/No), column and beam cross section, strength of concrete (fc) and the compression bar ratio (ρ'/ρ) on the beam supports. Data from the nonlinear analysis were assessed with ANN in terms of failure load and failure displacement. For all outputs, ANN was trained and tested using of 11 back-propagation methods. All of the ANN models were found to perform well for both failure loads and displacements. The analyses also indicated that a considerable portion of existing RC building stock in Turkey may not meet the safety standards of the Turkish Earthquake Code (TEC-2007).

scholarly journals Uplift Resistance Capacity of Anchor Piles used in Marine Aquaculture

2021 ◽  
Author(s):  
Fukun Gui ◽  
Jianqiao Kong ◽  
Dejun Feng ◽  
Xiaoyu Qu ◽  
Fang Zhu ◽  
...  
Keyword(s):  
Laboratory Experiments ◽  
Failure Load ◽  
Lateral Displacement ◽  
Single Pile ◽  
Initial Tension ◽  
Marine Aquaculture ◽  
Pile Diameter ◽  
Single Piles ◽  
Uplift Resistance ◽  
Better Than

Abstract Anchor piles are widely used in marine aquaculture, and their uplift resistance capacity largely determines their safety, especially in harsh ocean environments. However, a practical guide on its design and installation is wanting. Laboratory experiments were conducted to investigate the effect of the initial tension angle, pile diameter, embedded depth, and pile configuration on the uplift resistance capacity of anchor piles for marine aquaculture under oblique loads. The results show that increasing the initial tension angle of circular and square single piles can significantly improve the uplift resistance capacity. The failure load of the square single pile was slightly higher than that of the circular single pile. Increasing the pile diameter can effectively improve the failure load and delay the development speed of the pile top displacement. Increasing the embedded depth can effectively improve the failure load and increase the lateral displacement of the pile top. The uplift resistance capacity of the dual anchor piles was better than that of the single anchor piles. The layout configuration has little effect on the failure load, but has a large effect on the displacement development.

scholarly journals Analisis Pengaruh Lokasi Dinding Geser Terhadap Pergeseran Lateral Bangunan Bertingkat Beton Bertulang 5 Lantai

2021 ◽  
Vol 4 (1) ◽  
pp. 16
Author(s):  
Leonardus Setia Budi Wibowo ◽  
Dermawan Zebua
Keyword(s):  
Lateral Displacement ◽  
Shear Walls ◽  
Seismic Loading ◽  
Shear Wall ◽  
Structural System ◽  
Earthquake Force ◽  
Earthquake Resistant ◽  
Story Drift ◽  
Frame System ◽  
Rc Shear Wall

Indonesia is one of the countries in the earthquake region. Therefore, it is necessary to build earthquake-resistant buildings to reduce the risk of material and life losses. Reinforced Concrete (RC) shear walls is one of effective structure element to resist earthquake forces. Applying RC shear wall can effectively reduce the displacement and story-drift of the structure. This research aims to study the effect of shear wall location in symmetric medium-rise building due to seismic loading. The symmetric medium rise-building is analyzed for earthquake force by considering two types of structural system. i.e. Frame system and Dual system. First model is open frame structural system and other three models are dual type structural system. The frame with shear walls at core and centrally placed at exterior frames showed significant reduction more than 80% lateral displacement at the top of structure.

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