水电站厂房抗震分析中地震动强度指标选择研究

宋志强1,张剑峰1,2,王飞1,姚倩茹1

振动与冲击 ›› 2022, Vol. 41 ›› Issue (2) : 151-160.

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (2) : 151-160.
论文

水电站厂房抗震分析中地震动强度指标选择研究

  • 宋志强1,张剑峰1,2,王飞1,姚倩茹1
作者信息 +

Selection of ground motion intensity measures in the seismic analysis of hydropower houses

  • SONG Zhiqiang1,ZHANG Jianfeng1,2,WANG Fei1,YAO Qianru1
Author information +
文章历史 +

摘要

为了探究适用于水电站厂房抗震分析的地震动强度指标,基于某水电站地面厂房工程实例,首先选取42条天然地震动记录作为输入,对17种具有代表性的地震动强度指标与厂房结构的非线性地震响应进行相关性分析,评价各强度指标在水电站厂房地震响应分析中的适用性;然后基于增量动力分析(incremental dynamic analysis ,IDA)方法,选择上述相关程度较高的强度指标作为地震动强度参数IM,分别与结构的工程需求参数EDP在对数坐标系下进行线性回归分析,从有效性、适用性和效益性三方面综合评价各强度指标在概率地震需求分析(probabilistic seismic demand analysis,PSDA)中合理性以得到准确的地震易损性分析结论。结果表明:总体上,速度型指标与厂房结构响应的相关程度较高,加速度型指标次之,位移型指标最差,水电站厂房地震响应分析时应在速度型指标中优先选择与地震动频谱特征相关的指标;对IDA结果的对数线性回归分析发现速度型指标作为IM应用于PSDA更加合理,其中速度谱强度VSI在有效性、适用性和效益性三方面的综合表现最好,应用于地震易损性分析能够更加准确地评价水电站厂房的抗震性能。

Abstract

In order to explore the applicability of ground motion intensity measures used for the seismic analysis of hydropower house, an actual ground hydropower house is taken for an example. 42 natural earthquake records are firstly selected as inputs for the correlation analysis between 17 representative intensity measures and the non-linear seismic response of hydropower house to evaluate the suitability of intensity measures in seismic response analysis. Then, based on the results of incremental dynamic analysis, linear regression analysis between IMs with high correlation and EDP is carried out in logarithmic coordinate system to evaluate the rationality of intensity measures in probabilistic seismic demand analysis in terms of efficiency, practicality and proficiency, so as to obtain an accurate conclusion of seismic fragility analysis. The results show that, in general, velocity-type intensity measures have a higher correlation with the seismic response of hydropower house than acceleration-type intensity measures and displacement-type intensity measures, in addition, the velocity-type intensity measures related to spectrum characteristics should be preferentially chosen for seismic response analysis. According to the logarithmic linear regression analysis of incremental dynamic analysis(IDA) results, it is found that velocity-type intensity measures are more reasonable to be used as IM in PSDA. VSI is the best considering efficiency, practicality and proficiency, and can be applied to seismic fragility analysis to evaluate the seismic performance of hydropower house accurately.

关键词

水电站厂房 / 地震动强度指标 / 地震响应分析 / 增量动力分析 / 概率地震需求分析 / 地震易损性分析

Key words

hydropower house / ground motion intensity measures / seismic response analysis / incremental dynamic analysis / probabilistic seismic demand analysis / seismic fragility analysis

引用本文

导出引用
宋志强1,张剑峰1,2,王飞1,姚倩茹1. 水电站厂房抗震分析中地震动强度指标选择研究[J]. 振动与冲击, 2022, 41(2): 151-160
SONG Zhiqiang1,ZHANG Jianfeng1,2,WANG Fei1,YAO Qianru1. Selection of ground motion intensity measures in the seismic analysis of hydropower houses[J]. Journal of Vibration and Shock, 2022, 41(2): 151-160

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