scholarly journals Seismic Evaluation and Retrofitting of an Existing Buildings-State of the Art

2021 ◽  
Vol 24 (1) ◽  
pp. 52-75
Author(s):  
Haider Ali Abass ◽  
Husain Khalaf Jarallah
Keyword(s):  
Static Analysis ◽  
Pushover Analysis ◽  
Performance Based Design ◽  
Nonlinear Static Analysis ◽  
Building Structures ◽  
Seismic Evaluation ◽  
Modern Approach ◽  
Existing Building ◽  
Damage And Failure ◽  
Nonlinear Static

In this study, previous researches were reviewed in relation to the seismic evaluation and retrofitting of an existing building. In recent years, a considerable number of researches has been undertaken to determine the performance of buildings during the seismic events. Performance based seismic design is a modern approach to earthquake resistant design of reinforcement concrete buildings. Performance based design of building structures requires rigorous non-linear static analysis. In general, nonlinear static analysis or pushover analysis was conducted as an efficient instrument for performance-based design. Pushover analysis came into practice after 1970 year.  During the seismic event, a nonlinear static analysis or pushover analysis is used to analyze building under gravity loads and monotonically increasing lateral forces. These building were evaluated until a target displacement reached. Pushover analysis provides a better understanding of buildings seismic performance, also it traces the progression of damage and failure of structural components of buildings. 

scholarly journals PERFORMANCE BASED EVALUATION OF RCC BUILDING WITH DUAL SYSTEM

2020 ◽  
Vol 9 (6) ◽  
pp. 61-71
Keyword(s):  
Static Analysis ◽  
Plastic Hinge ◽  
Performance Based Design ◽  
Nonlinear Static Analysis ◽  
Building Performance ◽  
Or Methodology ◽  
Nonlinear Static ◽  
Performance Based Evaluation ◽  
Hinge Model ◽  
Story Building

Building performance is an indicator of how well a structure supports the defined needs of its users. Acceptable performance indicates acceptable (or tolerable) levels of damage or condition that allow uninterrupted facility operation. Consequently, performance-based design is the process or methodology used by design professionals to create buildings that protect functionality and the continued availability of services. In this Paper a 10 story building is designed using E-tabs software and a nonlinear static analysis is carried out using point plastic hinge model. The designed building was modelled and the hinges or possible failure locations were assigned. The stiffness of the building was increased due to the slab present and this was incorporated in the model using diaphragm. And finally the building is Evaluated as per its performance as per FEMA guidelines.

scholarly journals Adaptive Pushover Analysis of Irregular RC Moment Resisting Frames

10.29007/pbdr ◽  
2018 ◽  
Author(s):  
Rutvik Sheth ◽  
Devesh Soni ◽  
Minoli Shah
Keyword(s):  
Static Analysis ◽  
Pushover Analysis ◽  
Time History ◽  
Nonlinear Static Analysis ◽  
Seismic Zone ◽  
Fundamental Vibration ◽  
Moment Resisting ◽  
Nonlinear Static ◽  
Adaptive Pushover ◽  
Nonlinear Time History

Researchers and engineers certainly prefer to use nonlinear static methods over complicated nonlinear time-history methods. However, in nonlinear static procedure both predetermined target displacement and force distribution pattern are based on a false assumption that the structural behavior and its responses are dominated by the fundamental vibration modes. Therefore, over the past decades, there have been a great number of studies on considering higher mode contribution in nonlinear static results. The Displacement-based Adaptive Pushover Analysis (DAP) is one of the performance assessments tool for improving the accuracy of the obtained results of nonlinear static analysis in estimating the seismic demands of the structures. In this paper, 5 storey L- shaped RC frame is analyzed for seismic Zone IV and designed as per provisions of IS codes. Performance evaluation is carried out by nonlinear static analysis as well as adaptive pushover analysis and results are compared.

scholarly journals Nonlinear static analysis of a pile-supported wharf

2019 ◽  
Vol 12 (5) ◽  
pp. 998-1009 ◽  
Author(s):  
E. ZACCHEI ◽  
P. H. C. LYRA ◽  
F. R. STUCCHI
Keyword(s):  
Static Analysis ◽  
Pushover Analysis ◽  
The Body ◽  
Nonlinear Static Analysis ◽  
Environmental Damage ◽  
Structural Behaviour ◽  
Ground Acceleration ◽  
Critical Elements ◽  
Nonlinear Static ◽  
Oil Tankers

Abstract The aim of this paper is to carry out a nonlinear static analysis using a case study of a pile-supported wharf in a new oil tankers port. The seismic activity in this area is very intense with the peak ground acceleration of 0.55 g; for this reason, it is very important to analyse the structural behaviour of the nonlinear situation. The analysis of the wharf, modelled in 3D by finite element method, serves to calculate the structure vibration periods (the structure’s first period is 1.68 s) and the capacity curve. The design of the structure follows traditional criteria by international guidelines, and its procedure is in accordance to classic theoretical methods and codes. For the selection of adequate characteristic earthquake input for the pushover analysis European and Venezuelan codes have been used. Besides being important to study the seismic influence on the body of the wharf and on critical elements, as well as and the interaction fluid-structure-soil, it is also important to analyse the consequences of structure failure and to estimate the maximum allowed displacement. The results show that the ultimate displacement is 18,81 cm. A port is an extremely strategic work, which needs to be carefully designed to avoid environmental damage and maintain human safety.

Seismic Evaluation and Retrofit of Concrete Buildings: A Practical Overview of the ATC 40 Document

2000 ◽  
Vol 16 (1) ◽  
pp. 241-261 ◽  
Author(s):  
Craig D. Comartin ◽  
Richard W. Niewiarowski ◽  
Sigmund A. Freeman ◽  
Fred M. Turner
Keyword(s):  
Performance Based Design ◽  
Nonlinear Static Analysis ◽  
Seismic Evaluation ◽  
Capacity Spectrum Method ◽  
Seismic Safety ◽  
Concrete Buildings ◽  
Capacity Spectrum ◽  
Applied Technology ◽  
Nonlinear Static

The Applied Technology Council (ATC), with funding from the California Seismic Safety Commission developed the document, Seismic Evaluation and Retrofit of Concrete Buildings, commonly referred to as ATC 40. This two-volume, 612-page report provides a recommended procedure for the seismic evaluation and retrofit of concrete buildings. Although the focus is specifically on concrete buildings, the document provides information on emerging techniques applicable to most building types. This paper provides an introduction and overview of the document. The conceptual basis of the procedures is performance-based design using nonlinear static structural analysis. The ATC 40 document comprises a practical guide to the entire evaluation and retrofit process. Topics include performance objectives, seismic hazard, determination of deficiencies, retrofit strategies, quality assurance procedures, nonlinear static analysis using the capacity spectrum method, modeling recommendations, foundation effects, and response limits.

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