scholarly journals Bidirectional Energy-based Pushover Procedure as a Fast Approach to Establish Approximate IDA Curves under Biaxial Seismic Excitations: An Evaluation for Medium- and High-rise Buildings

2021 ◽  
Author(s):  
Sahman Soleimani ◽  
Abdolreza Sarvghad Moghadam ◽  
Armin Aziminejad
Keyword(s):  
Dynamic Analysis ◽  
Ground Motions ◽  
Structural Models ◽  
Incremental Dynamic Analysis ◽  
Seismic Excitations ◽  
High Rise ◽  
Asymmetric Buildings ◽  
Fast Approach ◽  
Unique Approach ◽  
Similar Accuracy

Abstract Bidirectional energy-based pushover (BEP) procedure is expanded in this paper to predict approximate incremental dynamic analysis (IDA) results of medium- and high-rise structures. BEP is a unique approach in the sense that it provides approximate IDA curves under the simultaneous effect of two horizontal components of ground motions and is applicable to both symmetric- and asymmetric-plan buildings. The method has already proved to be useful in low-rise buildings, and this study aims to evaluate its suitability for mid- and high-rise structures. Six structural models were considered in this evaluation in two groups of 9- and 20-story buildings, with each group consisting of a symmetric, a one-way asymmetric, and a two-way asymmetric-plan building. The results revealed that the method was sufficiently accurate to provide approximate IDA curves for all structural models. The method had similar accuracy in the asymmetric models as it did in the symmetric models, although the accuracy slightly decreased as the height of the building increased. BEP also provided good estimates of the demands in both ‘flexible’ and ‘stiff sides’ of the asymmetric buildings as well as the demands over the height of the buildings.

scholarly journals Seismic vulnerability assessment of a high-rise molten-salt solar tower based on incremental dynamic analysis

2020 ◽  
Vol 194 ◽  
pp. 01005
Author(s):  
Weiwei Sun ◽  
Dina D’Ayala ◽  
Jinxing Fu ◽  
Wentao Gu ◽  
Jun Feng
Keyword(s):  
Dynamic Analysis ◽  
Molten Salt ◽  
Seismic Performance ◽  
Vulnerability Assessment ◽  
Seismic Vulnerability ◽  
Incremental Dynamic Analysis ◽  
Seismic Excitations ◽  
Ground Acceleration ◽  
Seismic Vulnerability Assessment ◽  
High Rise

This paper investigates the seismic performance of a high-rise molten-salt solar tower by finite element modelling. The integrated and separated models for solar tower based on the concrete damage plastic model are validated by matching the behaviour of similar reinforced concrete chimney specimens. The modal analysis demonstrates the first four modes of the solar tower are translational vibration. Seismic simulations are developed through the incremental dynamic analysis. The most disadvantageous position of the tower is all concentrated in the opening section under multidirectional seismic excitations. The top displacement of the tower under bidirectional and three-directional earthquake actions is larger than that under unidirectional earthquake actions. The results of the seismic vulnerability assessment show that when the PGA equals to 0.035g, the tower will be intact; when the PGA equals to 0.1g (design peak ground acceleration), the probability of the moderate damage state is within 1.5%; when the PGA equals to 0.22g (maximum considered earthquake), the probability of the destruction state is below 0.7%. The seismic partitioned fragility analysis of the tower under multidirectional earthquake excitations illustrates that there are two peaks in the vulnerability surfaces. The anti-collapse analysis indicates the tower has a good seismic performance under multidirectional seismic excitations.

Seismic Performance Evaluation of Residential Structures in Egypt

2014 ◽  
Vol 919-921 ◽  
pp. 945-950
Author(s):  
Yasser E. Ibrahim ◽  
Osman Shallan ◽  
Ashraf Elshihy ◽  
Mohamed Selim
Keyword(s):  
Fragility Curves ◽  
Ground Motions ◽  
Three Dimensional ◽  
Structural Models ◽  
Incremental Dynamic Analysis ◽  
Reinforced Concrete Structures ◽  
Seismic Loads ◽  
Seismic Performance Evaluation ◽  
Existing Structures ◽  
Operational Life

In this research, analytical fragility curves for three existing structures are presented. Structures are 2-story, 6-story and 10-story residential reinforced concrete structures designed under dead ,live and seismic loads of zone 3 according to Egyptian code (2008). The design acceleration is 0.15g. The fragility curves are developed based on nonlinear incremental dynamic analysis of three dimensional structural models using SeismoStruct under twelve historic ground motions. Four performance levels are considered; fully operational, operational, life safe and near collapse.

Incremental dynamic analysis of high-rise towers

2009 ◽  
Vol 19 (8) ◽  
pp. 922-934 ◽  
Author(s):  
Behrouz Asgarian ◽  
Mahmood Yahyai ◽  
M. Mirtaheri ◽  
Hamid Rahmani Samani ◽  
Pejman Alanjari
Keyword(s):  
Dynamic Analysis ◽  
Incremental Dynamic Analysis ◽  
High Rise

scholarly journals Incremental Dynamic Analysis of Koyna Dam under Repeated Ground Motions

2018 ◽  
Vol 318 ◽  
pp. 012021 ◽  
Author(s):  
Nik Zainab Nik Azizan ◽  
Taksiah A. Majid ◽  
Fadzli Mohamed Nazri ◽  
Damodar Maity ◽  
Junaidah Abdullah
Keyword(s):  
Dynamic Analysis ◽  
Ground Motions ◽  
Incremental Dynamic Analysis

Seismic Performance of Jacket Type Offshore Platforms Through Incremental Dynamic Analysis

2010 ◽  
Vol 132 (3) ◽  
Author(s):  
Behrouz Asgarian ◽  
Azadeh Ajamy
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Behavior ◽  
Earthquake Engineering ◽  
Dynamic Instability ◽  
Ground Motions ◽  
Nonlinear Behavior ◽  
Incremental Dynamic Analysis ◽  
Offshore Platforms ◽  
Strong Ground Motions ◽  
Strong Ground

Fixed offshore platforms in seismic active areas may be subjected to strong ground motions, causing the platform to undergo deformation well into the inelastic range. In this paper, incremental dynamic analysis (IDA) of jacket type offshore platforms subjected to earthquake was performed in order to study the linear and nonlinear dynamic behavior of this type of structures. IDA is a parametric analysis method that has been recently presented to estimate structural performance under seismic loads. By using incremental dynamic analysis of jacket type offshore platforms, the assessment of demand and capacity can be carried out. The method was used to predict nonlinear behavior of three newly designed jacket type offshore platforms subjected to strong ground motions. The engineering demand parameters of the platforms in terms of story drifts and intermediate elevation maximum displacement for different records were compared. This method was used for the performance calculations (immediate occupancy, collapse prevention, and global dynamic instability) needed for performance-based earthquake engineering of the above mentioned platforms. Two different behaviors were observed for the third platform in the X and Y directions. Particular attention has to be paid for the seismic design of this kind of platform. The results of jacket type offshore platforms incremental dynamic analysis shows that the method is a valuable tool for studying dynamic behavior in a nonlinear range of deformation. Because of high uncertainty in the nonlinear behavior of this type of structures, it is recommended to use this method for the assessment and requalification of existing jacket type offshore platforms subjected to earthquake.

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