A Random Function Model of Ground Motion and PDEM-Based Seismic Reliability Analysis of Nonlinear Structures

2014 ◽  
Author(s):  
Zhangjun Liu ◽  
Linqiang Wu ◽  
Bo Zeng
Keyword(s):  
Reliability Analysis ◽  
Ground Motion ◽  
Random Function ◽  
Nonlinear Structures ◽  
Function Model ◽  
Seismic Reliability

scholarly journals Spectral Representation-Based Multidimensional Nonstationary Ground Motion Model for Seismic Reliability Analysis of Frame Structures

2021 ◽  
Vol 2021 ◽  
pp. 1-19
Author(s):  
Lawali Moussa Laminou ◽  
Xinghua Chen
Keyword(s):  
Power Spectrum ◽  
Reliability Analysis ◽  
Ground Motion ◽  
Spectral Representation ◽  
Response Spectrum ◽  
Frame Structure ◽  
Motion Model ◽  
Seismic Responses ◽  
Seismic Reliability ◽  
Ground Motion Model

A framework for a multidimensional nonstationary ground motion model based on spectral representation theory is proposed in this paper. The multidimensional nonstationary ground motion model is built from a local target to fit the multidimensional response spectrum. A four-stage modulation function takes into account the multidimensional intensity correlation and the modified Clough–Penzien (C-P) power spectrum with parameter correlation, which represent the two main aspects, the modulation function and the power spectrum of constructing the multidimensional nonstationary ground motion model. A multidimensional response spectrum constructed according to the standardizing response spectrum is used as the fitting target response spectrum. Samples of random ground motion for random seismic response and dynamic reliability study are finally obtained. The random seismic responses are then combined with the probability density evolution method (PDEM) to carry out the seismic reliability analysis of a randomly base-excited moment-resisting frame structure. In the numerical analysis, the nonlinear seismic responses and reliability of a 10-story reinforced concrete frame structure are carefully investigated in accordance with the Egyptian seismic code. As a result, the effectiveness of the proposed method is fully demonstrated.

scholarly journals Seismic Reliability Analysis of Structures

2007 ◽  
Vol 36 (13) ◽  
pp. 2081-2081 ◽  
Author(s):  
P. E. Pinto ◽  
R. Giannini ◽  
P. Franchin
Keyword(s):  
Reliability Analysis ◽  
Seismic Reliability

Seismic reliability analysis of reinforced concrete bridge pier using efficient response surface method–based simulation

2018 ◽  
Vol 21 (15) ◽  
pp. 2326-2339 ◽  
Author(s):  
Shyamal Ghosh ◽  
Swarup Ghosh ◽  
Subrata Chakraborty
Keyword(s):  
Least Squares ◽  
Reliability Analysis ◽  
Response Surface ◽  
Response Surface Method ◽  
Least Squares Method ◽  
Time History ◽  
Bridge Pier ◽  
Direct Monte Carlo Simulation ◽  
Seismic Reliability ◽  
Surface Method

Seismic reliability analysis of bridge structures during and succeeding an earthquake event is of significant importance. The more accurate and robust approach of seismic reliability analysis is based on direct Monte Carlo simulation technique. But it is computationally challenging due to the requirement of large number of nonlinear time history analyses. The response surface method–based metamodeling approach is a viable alternative in such situation. This study explores the advantage of moving least squares method–based adaptive response surface method compared to the usually applied least squares method–based response surface method for improved seismic reliability analysis of multi-span bridge pier. The nonlinear time history analyses of the bridge pier are performed in the OpenSees with fibre sections considering a ground motion bin corresponding to the specified hazard level of the bridge site. The seismic reliability analysis results obtained by the usual least squares method and the proposed moving least squares method–based response surface method are compared with that of obtained by more accurate direct Monte Carlo simulation technique to elucidate the effectiveness of the proposed approach.

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