桩基核岛厂房地震动力响应分析研究  

RESEARCH ON THE SEISMIC RESPONSE ANALYSIS OF NUCLEAR ISLAND BUILDINGS WITH PILE FOUNDATION

作　　者：杨建华 马英 蔡利建 沈亮 YANG Jianhua;MA Ying;CAI Lijian;SHEN Liang(China Nuclear Power Engineering Co.,Ltd.,Beijing 100840,China)

机构地区：[1]中国核电工程有限公司,北京100840

出　　处：《工业建筑》2021年第12期31-36,共6页Industrial Construction

摘　　要：桩基础的模拟、地基土模型及与之匹配的地震动输入、地震动输入位置等是桩基核岛厂房地震动力响应的关键影响因素。以某典型非基岩核电厂的场地条件为研究背景,建立了考虑桩-土-核岛厂房相互作用的地震动力响应计算模型,采用等效线性的方法模拟近场非基岩地基的非线性动力特性,讨论了地基土模型及与之匹配的地震动输入的计算方法;在此基础上,研究了桩基础模拟方法、地震动输入及其位置对桩基核岛厂房地震动力响应的影响。研究认为:桩基核岛厂房地震动力响应分析中地基土模型与地震动输入应相互匹配;采用实体单元可以更准确模拟桩基核岛厂房的地震动力响应;地震动输入位置对厂房动力响应影响不明显,但不同位置的设计地震动对其影响较为明显。研究成果对桩基核电厂的设计、非基岩核电厂选址工作等都有重要的参考意义。The foundation soil profile and corresponding consistent input motion, simulation of pile foundation, design seismic motion and the input level are the most important influence factors on the seismic response analysis of NI buildings with pile foundation. Base on the site soil properties of a typical non-bedrock nuclear power plant, the seismic response analysis model were developed with piles, soil and NI buildings. The equivalent linearization method was introduced to consider the nonlinear dynamic properties, and the development of soil profile and corresponding consistent input motion were proposed. The influences of simulation method of pile foundation, design seismic motion and input level on the seismic response of NI buildings with pile foundation were studied. The research showed that, the input motion should be consistent with the soil profiles used in seismic analysis of non-bedrock NI building;piles might be modeled by solid element which could simulate the seismic response more accurately;and there was small influence of equivalent seismic motion at different input level on the seismic response of NI building, but influence are significant due to the different design seismic motion at different level. The research works are of great importance to the design of nuclear island with pile foundation, and also the site selection of non-bedrock nuclear power plant.

关 键 词：桩基础 非基岩核电厂 核岛厂房 地震动力响应 桩-土-结构相互作用 楼层反应谱 

分 类 号：TU311.3[建筑科学—结构工程] TM623[电气工程—电力系统及自动化]