摘要
城市地下隧道的存在将改变地表临近既有建筑的地基条件,进而影响建筑的地震响应。基于广义层间位移谱,研究地下隧道对距隧道不同距离的地表建筑结构的层间位移的影响,同时分析隧道对结构层间位移沿无量纲高度分布的影响。结果表明:地下隧道的存在将增加临近地表建筑结构的层间位移,对结构的安全性带来危害,在工程设计和分析中不容忽视;当地表建筑位于距离隧道中心线2倍隧道直径的区域外时,隧道的影响可以忽略;隧道的存在对临近建筑结构层间位移沿高度分布趋势的影响并不明显,但是将显著增加结构抗震性能薄弱部位的层间位移。
Existence of tunnel in urban area changes the foundation conditions of nearby existing structures, affecting the seismic response of buildings. Generalized inter-story drift spectrum~ in which the existing structures were equivalently simplified as combined shear-flexural beams, was used to analyze the influence of tunnel on inter- story drift of nearby buildings with different distances from the tunnel ; meanwhile, the influence of the tunnel on the inter-story drift distribution along the dimensionless height was studied and discussed. It is illustrated that existence of tunnel increases the inter-story drift of structures, so more attention should be paid in engineering design and analysis ; when the building is located away from the tunnel with distance of 2.0 times diameter length of the tunnel, the effect of the tunnel can be ignored. Additionally, the existence of the tunnel does not influence the inter-story drift ratio distribution along dimensionless height, however, it increases the inter-story drift of the anti-seismic weakness location of the building, which should be considered carefully.
出处
《地下空间与工程学报》
CSCD
北大核心
2017年第3期765-772,共8页
Chinese Journal of Underground Space and Engineering
基金
国家自然科学基金(50978043)
关键词
层间位移谱
地震响应
邻近建筑
层间位移分布
inter-story drift spectrum
seismic analysis
adjacent structures
inter-story drift distribution
