基于概率密度演化方法的可液化夹层场地框架结构地震响应分析

兰州理工大学学报 ›› 2025, Vol. 51 ›› Issue (6): 145-151.

基于概率密度演化方法的可液化夹层场地框架结构地震响应分析

杨加智^*1, 李睿¹, 汪俊诚²

1.中国电建集团华东勘测设计研究院有限公司, 浙江杭州 311122;
2.河海大学土木与交通学院, 江苏南京 210024

收稿日期:2022-09-29 发布日期:2025-12-31
通讯作者: 杨加智(1981-),男,江苏如东人,正高级工程师.Email:yang_jz@hdec.com
基金资助:
国家自然科学基金(52078186)

Seismic response analysis of frame structure with liquefiable interlayer site based on probability density evolution method

YANG Jia-zhi¹, LI Rui¹, WANG Jun-cheng²

1. PowerChina Huadong Engineering Corporation Limited, Hangzhou 311122, China;
2. College of Civil and Transportation Engineering, Hohai University, Nanjing 210024, China

Received:2022-09-29 Published:2025-12-31

摘要/Abstract

摘要： 基于FLAC3D有限差分软件建立地基-框架结构耦合分析数值模型,分析不同液化夹层埋深和厚度对框架结构地震响应的影响,研究结构层间位移角和沉降量的变化规律.在此基础上,通过概率密度演化理论研究结构的随机地震反应.结果表明:液化夹层厚度不变,随着液化夹层埋深的增加,建筑物最大层间位移角和建筑物整体沉降量都逐渐减小,最危险楼层的出现位置随液化夹层埋深的增加而下移;液化夹层埋深不变,随着液化夹层厚度的增加,建筑物最大层间位移角和整体沉降量都增加.以确定性计算结果为标准,结构抗震可靠度为0.492,表明考虑地震动的随机特性在结构抗震分析中是有必要的.

关键词: 液化夹层, 框架结构, 概率密度演化, 可靠度

Abstract: Based on FLAC3D finite difference software, a numerical model for coupling analysis of foundation and frame structure is established to analyse the influence of different buried depths and thickness of liquefied interlayer on the seismic response of frame structure, and to study the variation law of inter-story displacement angle and settlement of structure. On this basis, the random seismic response of the structure is further studied by probability density evolution theory. The results show that the maximum inter-story displacement angle and the overall settlement of the building decrease with the increase of the buried depth of the liquefied interlayer, and the location of the most dangerous floor moves downward with the increase of the buried depth of the liquefied interlayer. Moreover, with the increase of the thickness of the liquefied interlayer, the maximum inter-story displacement angle and the overall settlement of the building increase. Based on the deterministic calculation results, the seismic reliability of the structure is 0.492, which indicates that it is necessary to consider the random characteristics of the ground motion in the seismic analysis of the structure.

Key words: liquefaction interlayer, frame structure, probability density evolution, reliability

中图分类号:

TU44

杨加智, 李睿, 汪俊诚. 基于概率密度演化方法的可液化夹层场地框架结构地震响应分析[J]. 兰州理工大学学报, 2025, 51(6): 145-151.

YANG Jia-zhi, LI Rui, WANG Jun-cheng. Seismic response analysis of frame structure with liquefiable interlayer site based on probability density evolution method[J]. Journal of Lanzhou University of Technology, 2025, 51(6): 145-151.

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