地形效应对于核电场地地震反应分析影响研究  

Study on influence of topographic effect on seismic response analysis of nuclear power site

作　　者：张海 史晨阳 尤红兵 苏振飞 季新星 ZHANG Hai;SHI Chenyang;YOU Hongbing;SU Zhenfei;JI Xinxing(Tianjin Key Laboratory of Civil Structure Protection and Reinforcement,Tianjin 300384,China;China Earthquake Disaster Prevention Center,Beijing 100029,China;College of Civil Engineering of Tianjin Chengjian University,Tianjin 300384,China)

机构地区：[1]天津市土木建筑结构防护与加固重点实验室,天津300384 [2]天津城建大学土木工程学院,天津300384 [3]中国地震灾害防御中心,北京100029

出　　处：《世界地震工程》2018年第3期12-22,共11页World Earthquake Engineering

基　　金：国家自然科学基金项目(51248004);天津市自然科学基金(17JCYBJC21700);天津市"131"创新型人才培养工程人选计划;天津市高校"学科领军人才培养计划"

摘　　要：目前,在进行核电场地安全性评价时,主要采用一维等效线性化程序LSSRLI-1,而一维等效线性化方法在考虑地形效应时有很大的局限性,特别是在研究场地地形效应的影响时偏差较大。对于抗震设计要求远高于一般建筑的核电站来说,选用合适的方法进行二维建模分析是非常必要的。选取了某核电场地典型剖面15个钻孔资料,在MIDAS二维等效线性分析环境下进行了建模,并选取了以年超越概率10^(-4)合成的地震动中10条最大样本时程作为基底输入进行分析。通过与LSSRLI-1的计算结果进行对比,研究了地形效应对地表和核岛基础处(8. 5m)加速度反应谱的影响,并提出了设计建议。分析得出:二维分析中地形效应对地表加速度最大值反应谱的双峰形态影响较大,并且计算结果对AP1000谱的超越情况有所变化;对核岛基础处(8. 5m)峰值加速度的影响程度比地表要小,没有表现双峰形态变化较大的形态。At present, one-dimensional equivalent linearization program LSSRLI - 1 is mainly used in the seismic safety evaluation of sites of nuclear power plants, but the program has great limitations when considering topograph- ic effect, especially, has a large deviation in studying site topographic effect. For nuclear power plants whose seis- mic design standard is much higher than that of general buildings, it is very necessary to choose an appropriate method for two-dimensional modeling and analysis. 15 borehole data from sites of a typical nuclear power plant were selected for modeling in the two-dimensional equivalent linearization analysis environment of MIDAS, and 10 accel- eration time histories synthesized based on annual exceeding probability 10-4 were selected as the base input for a- nalysis. By comparing with the calculation results of LSSRLI - 1, the influence of topographic effect on the acceleration response spectra of ground surface and nuclear island foundation （8.5m） was studied, and the design suggestions were proposed. The results are as follows. The topographic effect has a great influence on the double peak shape of the acceleration response spectra in the two-dimensional program, and the calculation results have changed the exceeding situation of AP1000 spectrum. The peak acceleration at the base of the nuclear island foundation （8.5m） is less affected than that at the ground surface, and there is no obvious variation in the double peak shape.

关 键 词：地形效应 核电场地 加速度反应谱 地震反应分析 

分 类 号：P315.9[天文地球—地震学]