基于近场动力学的隧道衬砌结构渐进裂损数值模拟分析  

Numerical simulation analysis of tunnel lining structure crack damage based on peridynamics

作　　者：马云峰 徐林生[1] MA Yunfeng;XU Linsheng(College of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China;Department of Municipal Engineering, Chongqing Water Resources and Electeic Engineering College, Chongqing 402160, China)

机构地区：[1]重庆交通大学土木工程学院,重庆400074 [2]重庆水利电力职业技术学院市政工程系,重庆402160

出　　处：《西安理工大学学报》2019年第1期120-126,共7页Journal of Xi'an University of Technology

基　　金：重庆市教育委员会科学技术研究资助项目(KJ1735451;KJQN201803804);重庆市涪陵科委和重庆市交通科技资助项目(FLKJ2016BBB1082);重庆交通大学交通土建工程材料国家地方联合工程实验室开放基金资助项目(LHSYS-2016-004);重庆市交通科技资助项目(JK2015-03);渝水职院院级科研资助项目(K201707)

摘　　要：隧道衬砌的开裂问题一直是隧道施工运营中的重要问题。基于应变能密度等效的原则,将近场动力学理论和有限元思想结合起来,利用ABAQUS建立数值模型对衬砌裂缝的渐进开裂过程进行分析,通过与原型试验进行对比分析,验证了此方法的可行性。在此基础上分析了局部偏压、背后空洞和衬砌厚度不足三种因素对隧道衬砌开裂的影响,分析在此过程中裂缝分布和扩展规律,并分析由于开裂产生的衬砌位移和应变能释放的时程变化趋势。为现役运营隧道衬砌裂缝的防治提供一定的参考。The tunnel lining cracking problem has always been an important issue in the tunnel construction operations.Based on the principle of equivalent strain energy density,we combine peridynamics theory and finite element methods and use ABAQUS to establish a numerical model for the process of gradual cracking of lining crack analysis.By comparing and analyzing the prototype test,the feasibility of this method is verified.The influence on the cracking of tunnel lining under asymmetric load,voids behind lining and the limitations of lining thickness is analyzed,with the distribution and regularity of the crack and the lining displacement and time history trend of release process of strain energy caused by cracking analyzed.This provides some reference for the prevention and control of tunnel lining cracking.

关 键 词：近场动力学 衬砌开裂 偏压 衬砌背后空洞 衬砌厚度不足 数值模拟分析 

分 类 号：U457.2[建筑科学—桥梁与隧道工程]