无限地基辐射阻尼对核岛厂房结构地震响应的影响  

Effects of Foundation Radiation Damping on Seismic Response of Nuclear Island Buildings

作　　者：金煜皓 尹训强[1] 王桂萱[1] 

机构地区：[1]大连大学土木工程技术研究与开发中心,辽宁大连116622

出　　处：《工程抗震与加固改造》2015年第5期99-105,共7页Earthquake Resistant Engineering and Retrofitting

基　　金：国家重大科技专项"CAP1400安全审评技术与独立验证试验"(2011ZX06002-10)资助课题;辽宁省教育厅一般项目(l2014498)

摘　　要：无限地基辐射阻尼效应的有效模拟,是开展核岛厂房结构地震响应分析的核心技术问题,本文以Super FLUSH软件为研发平台,在地基有限域外边界施加粘性边界以耗散反射波波动能量,从而考虑无限地基辐射阻尼效应,进行核岛厂房结构地震响应分析。最后,以某地基条件下的CPR1000堆型反应堆厂房的集中质量简化模型为例,通过上述数值模型与刚性地基模型的对比分析,开展无限地基辐射阻尼对核岛厂房结构地震响应影响的研究,并就不同的地基弹性模量对无限地基辐射阻尼的影响进行了探讨。计算结果表明,软弱地基条件下辐射阻尼的作用明显,而该模型亦表现出良好的精度和计算效率。本文研究成果对类似核岛厂房结构的抗震分析具有一定参考价值。The effective simulation of infinite foundation radiation damping effect is a key technical problem for carrying out a seismic response analysis of nuclear island. A nuclear structure calculation model based on the software platform of Super FLUSH that simulates the radiation damping by setting viscous artificial boundary in the limited area of foundation is established. Furthermore, taking calculation model of CPR1000 nuclear reactor as the object of study, and the comparing with rigid foundation, the research on the impact of foundation radiation damping on seismic response of nuclear island structure is conducted. The results show that the radiation damping has a significant effect on seismic responses of nuclear island. In addition, the effect of elastic modulus of foundation on the infinite foundation radiation damping is also studied and the radiation damping effect is too obvious to be ignored under the condition of weak foundation. The results of the study can provide reference for seismic analysis of adaptability of nuclear power plant foundation.

关 键 词：无限地基辐射阻尼 核岛厂房地震响应 地基弹性模量 

分 类 号：TU311.3[建筑科学—结构工程]