scholarly journals Seismic Performance of Partially Dismantled Buildings

2018 ◽  
Vol 13 (1) ◽  
pp. 69-77
Author(s):  
Jagat Kumar Shrestha
Keyword(s):  
Seismic Performance ◽  
Residential Buildings ◽  
Pushover Analysis ◽  
Seismic Evaluation ◽  
The Road ◽  
Nonlinear Static ◽  
The Comparative Study ◽  
Road Widening ◽  
Static Pushover Analysis ◽  
Storey Building

 This study carries out the comparative study of Seismic Performance of residential buildings after partial dismantling for road widening works in Kathmandu city. Two types of buildings were taken for the study, i.e. 4 storey building and 6 storey building. The Buildings were assessed for bare frames. The detail level of the seismic evaluation was carried out by preparing 3-D modeling of the buildings in SAP2000 software by nonlinear static pushover analysis. The capacity of the buildings has been found significantly decreased after the partial dismantling of the building due to the road widening works. The behavior of buildings has been found like a strong beam and weak column mechanism.Journal of the Institute of Engineering, 2017, 13(1): 69-77

scholarly journals Seismic Performance Evaluation of a Fully Integral Concrete Bridge with End-Restraining Abutments

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Byung H. Choi ◽  
Lorenz B. Moreno ◽  
Churl-Soo Lim ◽  
Duy-Duan Nguyen ◽  
Tae-Hyung Lee
Keyword(s):  
Seismic Performance ◽  
Lateral Displacement ◽  
Pushover Analysis ◽  
Frame Structure ◽  
Performance Criteria ◽  
Elastic Behavior ◽  
Integral Bridge ◽  
Nonlinear Static ◽  
Static Pushover Analysis ◽  
Nonlinear Static Pushover Analysis

A fully integral bridge that is restrained at both ends by the abutments has been proposed to form a monolithic rigid frame structure. Thus, the feasible horizontal force effect due to an earthquake or vehicle braking is mainly prevented by the end-restraining abutments. In a recent study, a fully integral bridge with appropriate end-restraining abutment stiffness was derived for a multispan continuous railroad bridge based on linear elastic behavior. Therefore, this study aims to investigate the nonlinear behavior and seismic capacity of the fully integral bridge and then to assess the appropriate stiffness of the end-restraining abutment to sufficiently resist design earthquake loadings through a rigorous parametric study. The finite element modeling and analyses are performed using OpenSees. In order to obtain the force-deflection curves of the models, nonlinear static pushover analysis is performed. It is confirmed that the fully integral bridge prototype in the study meets the seismic performance criteria specified by Caltrans. The nonlinear static pushover analysis results reveal that, due to the end-restraining effect of the abutment, the lateral displacement of the fully integral bridge is reduced, and the intermediate piers sustain less lateral force and displacement. Then, the sectional member forces are well controlled in the intermediate piers by a proper application of the end-restraining abutments.

scholarly journals SEISMIC EVALUATION OF HIGH RISE BUILDING WITH VERTICAL IRREGULARITIES BY PUSHOVER ANALYSIS

2021 ◽  
Vol 6 (2) ◽  
Author(s):  
Syed Shoaib ◽  
Syed Shoaib ◽  
Dr M L Waiker
Keyword(s):  
Structural Damage ◽  
Pushover Analysis ◽  
Vertical Plane ◽  
Base Shear ◽  
Seismic Evaluation ◽  
High Rise ◽  
Performance Point ◽  
Structural Irregularities ◽  
And Behavior ◽  
Static Pushover Analysis

During earthquake motion. The seismic behavior depends upon the strength, mass, and stiffness are distributed in both horizontal and vertical planes. the buildings structural damage was severe the frame is caused due to the discontinuity in the stiffness mass and strength between the alongside stories. The same type of discontinuity is vertical geometric irregularity which is due to the irregular building configuration in vertical plane so there is to know the seismic response of building modals in different structural irregularities. Non-linear static (pushover analysis) which is used for Investigation. The purpose of study doing nonlinear static (pushover analysis) by conventional design methodology G+12 High rise buildings this work shows seismic performance and behavior of building frame with and without vertical irregularity in terms of base shear, story shear, story displacement the performance point of all models are considered also found that irregularity in assessment of the structure decreases the performance level of building there is also reduces in deformation or displacement of the structure. all the models analyzed by using ETABS and design as per IS 456:200 and 1893:2016

scholarly journals Nonlinear Static Pushover Analysis of Medium Rise and High-Rise Building

2019 ◽  
pp. 255-561
Author(s):  
M Keshava Murthy ◽  
Ashwini L K
Keyword(s):  
Pushover Analysis ◽  
Performance Level ◽  
Base Shear ◽  
High Rise ◽  
High Rise Building ◽  
Non Linear ◽  
Nonlinear Static ◽  
Static Pushover Analysis ◽  
Different Levels ◽  
Nonlinear Static Pushover Analysis

Pushover analysis is an elegant tool to visualise the performance level of a building under a given earthquake. The purpose of the paper is to summarize the Non Linear static Pushover analysis of medium rise RC bare frame and high rise RC infilled structure with soft stories at different levels using ETABS software. Results concluded that due to the introduction of soft stories in the higher level the intensity of hinge formation becomes lower and lower and at the same time displacement and base shear increases

Seismic Performance Assessment of an Existing Road Bridge Using Standard Pushover Analysis

2011 ◽  
Vol 147 ◽  
pp. 278-282
Author(s):  
Teresa A. Roseenid ◽  
N. Premavathi ◽  
Gunasekaran Umarani
Keyword(s):  
Transverse Direction ◽  
Pushover Analysis ◽  
Concrete Bridge ◽  
Target Displacement ◽  
Seismic Performance Assessment ◽  
Lateral Forces ◽  
Inelastic Seismic Response ◽  
Nonlinear Static ◽  
Static Pushover Analysis ◽  
Nonlinear Static Pushover Analysis

The inelastic seismic response of an existing multi-span concrete bridge is investigated by performing nonlinear static pushover analysis. The bridge is subjected to lateral forces distributed proportionally over the span of the bridge in accordance with the product of mass and mode shape. The bridge is pushed up to the target displacement and the hinge formations of the bridge in different steps of the pushover procedure in the transverse direction are obtained. The expected capacity of the bridge is evaluated and compared with the displacement demand.

Reliability Analysis in Performance-Based Earthquake Engineering

2014 ◽  
Vol 580-583 ◽  
pp. 1581-1590 ◽  
Author(s):  
Abdelouafi el Ghoulbzouri ◽  
Zakaria el Alami ◽  
Sabrine el Hannoudi
Keyword(s):  
Finite Element ◽  
Earthquake Engineering ◽  
Pushover Analysis ◽  
Importance Sampling Method ◽  
Expected Performance ◽  
Reliability Method ◽  
Full Coupling ◽  
Nonlinear Static ◽  
Performance Based Earthquake Engineering ◽  
Static Pushover Analysis

The performance-based engineering approach, as opposed to prescriptive rules of code-based design, is based on simulation of real structural behavior. Reliability of the expected performance state is assessed by using various methodologies based on finite element nonlinear static pushover analysis and specialized reliability software package. Reliability approaches that were considered included full coupling with an external finite element code based methods in conjunction with either first order reliability method or importance sampling method. The building considered in the actual study has been designed against seismic hazard according to the Moroccan code RPS2000.

scholarly journals Jacketing of existing reinforced concrete structures with composites in view of seismic rehabilitation

2018 ◽  
Vol 191 ◽  
pp. 00006
Author(s):  
Siham Bouras ◽  
Abdellatif Khamlichi ◽  
Sabri Attajkani
Keyword(s):  
Reinforced Concrete ◽  
Pushover Analysis ◽  
Nonlinear Static Analysis ◽  
Initial State ◽  
Seismic Rehabilitation ◽  
Lateral Resistance ◽  
Concrete Building ◽  
Nonlinear Static ◽  
Static Pushover Analysis

Seismic rehabilitation of pre-code existing buildings requires the choice of the method of strengthening and the determination of the amount of materials to be used optimally. Accurate evaluation of the building response in terms of its capacity at the initial state and that obtained after application of some reinforcement should be performed. For regular buildings, the nonlinear static analysis procedure constitutes a powerful tool that is used to estimate seismic performance. This procedure is characterised by its high effectiveness to account for the non-linear characteristics of the materials involved and provides a direct mean to shape the capacity curve of the construction; enabling then to make the correct decision about rehabilitation task with regards to a desired performance state. In this work, the nonlinear static pushover analysis was performed by means of ZeusNL software. Use was made of the Moroccan seismic regulations RPS2000 version 2011to determine the targeted seismic demand. Considering a four floor reinforced concrete building which is undersized with regards to actual seismic regulation, jacketing with fiber reinforced composites at different reinforcement rates was analyzed. The obtained results were expressed in terms of the lateral resistance capacity and the building tip displacement. Optimal jacketing of columns was then determined.

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