摘要
基坑会对附近场地的动力响应产生影响,目前对基坑附近的场地在地震作用下的动力响应还缺乏足够的认识,现行的建筑抗震设计规范也没有给予充分的关注。本文对典型基坑及附近场地的地震反应进行动力数值模拟,分析基坑对两侧地表加速度峰值的影响及不同深度加速度峰值的变化规律。结果表明,相对于没有基坑的场地,基坑的存在会使其周围2倍开挖深度范围内地表的加速度峰值增大很多,这不利于邻近浅埋基础建筑的抗震设防。
There are many deep excavations located in major cities because of the rapid development of underground engineering.The existence of deep excavations will affect the seismic response of the ground.However,there is great uncertainty concerning the dynamic performance of the adjacent ground and the current anti-earthquake design codes do not provide enough consideration to the problem.In this paper,a dynamic numerical simulation was performed to analyze the influence of deep excavations on the peak acceleration of the adjacent ground.In addition,the variation in peak acceleration along the depth was studied.The results show that the peak acceleration of the adjacent ground will significantly increase within a distance of two times the excavation depth.
出处
《地震工程学报》
CSCD
北大核心
2016年第1期116-119,128,共5页
China Earthquake Engineering Journal
基金
国家自然科学基金项目(41272280)
国家自然科学基金重点项目(51038007)
清华大学自主科研计划课题(20121087977)
关键词
基坑
地面运动
地震反应
加速度峰值
excavation
ground motion
seismic response
peak ground acceleration
