Influence factors analysis and Bayesian estimation for residual displacement index of RC pier

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (19) : 145-150.

ZENG Wuhua1, ZHUO Weidong2, WANG Dongsheng3

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Abstract

Here, to reveal effect laws of parameters on residual displacement index of RC pier under quasi-static force action, Bayesian estimation of residual displacement index in deformation limit state was deduced. The quasi-static test component model of a RC pier was established with the software OpenSees, and the model was verified using simulation based on test results. Based on quasi-static numerical analysis calculation results of 256 RC piers, statistical characteristics of the residual displacement index and main influencing factors were studied. Then, the linear regression analysis method was used to establish the prior probability distribution model of RC pier residual displacement index. Based on Bayesian theory, the posterior probability distribution model of RC bier residual displacement index under quasi-static action was established through updating small sample test data. The results showed that the main influencing factor of residual displacement index of RC pier is axial compression ratio, the index decreases with increase in axial compression ratio; the established posterior probability distribution model can be used to accurately estimate RC bier residual displacement index, it can provide conveniences for aseismic design of RC bier or considering the randomness of its residual displacement in evaluation.

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pier / residual displacement / Bayesian updating / quasi-static test / numerical simulation

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ZENG Wuhua, ZHUO Weidong, WANG Dongsheng. Influence factors analysis and Bayesian estimation for residual displacement index of RC pier[J]. Journal of Vibration and Shock, 2021, 40(19): 145-150

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