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Title:: Shaking Table Test and Numerical Simulation of Tunnel Side-crossing Box Foundation Frame Structure System

作者:: 路沙沙¹; 白晓晓¹; 张亚楠¹; 孟薇¹; 袁镝¹; 徐红²; (1.辽宁工程技术大学土木工程学院,辽宁阜新 123000; 2.北京工业大学城市与工程安全减灾教育部重点实验室,北京 100124)

Author(s):: LU Shasha¹; BAI Xiaoxiao¹; ZHANG Yanan¹; MENG Wei¹; YUAN Di¹; XU Hong²; (1.College of Civil Engineering,Liaoning Technical University,Fuxin 123000,Liaoning,China)(2.Key Laboratory of Urban and Engineering Safety and Disaster Reduction,Ministry of Education,Beijing University of Technology,Beijing 100124,China)

Keywords:: underground tunnels; box-foundation frame structure; shaking-table test; numerical simulation; dynamic response

摘要:: 以郑州市轨道交通7号线侧穿箱基框架结构工程为背景,开展了室内振动台缩尺模型试验,并借助有限元软件ABAQUS对不同工况进行数值建模,将振动台试验和数值模拟结果进行对比,验证数值模拟结果的可靠性。基于验证后的模型,分析隧道侧穿箱基框架结构体系的动力响应特性。结果表明:①隧道或箱基框架结构的存在均会降低整个体系的自振频率; ②箱基框架结构的存在会降低隧道结构的加速度响应,同时减弱隧道结构所受到的弯矩,而对其所受剪力的影响不大; ③隧道结构的存在会减弱箱基框架结构的加速度响应和位移响应。箱室的存在会改变地震波的传播路径,且当箱基框架结构高于三层时,楼板加速度响应随楼层高度的增大更明显。

Abstract:: In this paper,based on a side-crossing,box-foundation frame structure of the project of Line 7 urban rail traffic in Zhengzhou city,a scaled model test on the indoor shaking table is carried out.With the help of the finite element software ABAQUS,the numerical modeling for different working conditions is done,and the results from the shaking table test are compared with the results from the numerical analysis to verify the results from the shaking table test.Then,based on the validated model,the seismic response characteristics of the side-crossing,box-foundation frame structure of the tunnel side is studied.The results show that:① The tunnel or box-foundation frame structure will reduce the natural frequency of the whole system; ② The box-foundation frame structure will reduce the acceleration response of the tunnel structure,weaken the bending moment of the tunnel structure,but it has little effect on its sheer force of the structure itself; ③ The tunnel structure will weaken the acceleration response and displacement response of the box-foundation frame structure.The box will change the propagation path of the seismic wave,and when the box-foundation frame structure is more than three stories,the acceleration response of the floor becomes more obvious with the increase of the number of the floors.