地下隧道内爆炸冲击下地表多层建筑的动力响应研究  

DYNAMIC RESPONSE OF THE MULTI-STOREY BUILDING SUBJECTED TO BLAST LOADING IN UNDERGROUND TUNNEL

作　　者：田力[1] 高芳华[2] 

机构地区：[1]天津大学建筑工程学院/滨海土木工程结构与安全教育部重点实验室(天津大学),天津300072 [2]中国建筑设计研究院,北京100044

出　　处：《工程力学》2011年第11期114-123,共10页Engineering Mechanics

基　　金：国家自然科学基金项目(50678116);国家科技支撑计划重点项目(2006BAJ13B02);天津市应用基础与前沿技术研究计划重点项目(08JCZDJC19500)

摘　　要：该文对带有筏板基础和地下室的多层框架及框剪建筑物在遭受邻近地下隧道内爆炸冲击作用下的动力响应进行了分析研究。采用ABAQUS软件建立了考虑地基土和混凝土等材料非线性的隧道-土体-多层建筑耦合体系的三维数值模型,经与LS-DYNA模型结果的比较分析验证了该文所建体系模型的正确性和有效性。通过大量的算例分析,对隧道内爆炸冲击下地表多层建筑在单线、双线隧道布局、建筑物与爆炸隧道之间距离的变化、以及爆炸点沿隧道纵轴线的位置移动等3组工况下的动力响应规律进行系统研究。结果显示:介于建筑物与爆炸隧道之间的另一平行隧道使爆炸波在土中的传播受到明显阻碍,继而削弱了建筑物的动力响应幅值;不同类型的多层建筑随着与爆炸点位置的不断接近均产生愈发强烈的动力响应,而彼此之间抗爆动力性能的差异也更为显著。The dynamic response of three types of a multi-storey building （including a framed structure with raftfoundation, a flame-shear wall structure with raft foundation, a framed structure with basement） under a blast loading generated by an in-tunnel explosion is investigated numerically. The ABAQUS software is used to establish a three-dimension tunnel-soil-multi-storey building coupling model considering the material nonlinearity of the concrete and soil. The accuracy and validity of the coupling model set up with the ABAQUS software are verified by a comparison between its results and those from a LS-DYNA coupling model. A large number of example analyses are carried out to systematically disclose the response characteristics of the aboveground building subjected to an in-tunnel explosion in three groups of cases, i.e. the one-way and two-way tunnel layouts, the change of a distance between the building and the explosion-happening tunnel, and the change of the explosive position along the tunnel＇s longitudinal axis. The results show that another parallel tunnel set between the building and the explosion-happening tunnel has an obstructive effect on the blast waves＇ propagation in soil, resulting in a distinct decrease of peak responses of aboveground structures： all tvoes of buildings have anincreasingly violent response when the explosive position is closer to the structure, while their difference of anti-explosion capability from one another become more remarkable during this course.

关 键 词：隧道内爆炸 筏板基础 地下室 框架结构 框剪结构 动力响应 

分 类 号：TU435[建筑科学—岩土工程] TU352.12[建筑科学—土工工程]