大型地下工程结构整体静力响应问题的数物融合试验方法  

Numerical-physical coupling test method for structural static response of large underground structure

作　　者：闫治国[1] 王林夕 Yan Zhiguo;Wang Linxi(College of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《东南大学学报（自然科学版）》2022年第5期866-874,共9页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(52078378)。

摘　　要：为解决大型隧道与工程结构足尺试验难度高或响应失真问题,提出了一种针对大型隧道与地下工程结构整体静力问题的等效整体结构加载的数物融合试验方法.基于数值仿真与物理试验相结合的思路,在物理空间中对若干个足尺构件进行试验,在数值空间中则对完整地下结构进行建模计算.2个空间通过参数识别及等效加载模块进行实时交互修正,以同时逼近真实结构响应.以基本管片构件的数值试验代替物理空间中的真实试验,对隧道衬砌结构数物融合试验过程进行数值模拟.结果表明,数物融合试验方法得到的响应与整体结构试验的真实响应接近,位移和应变的平均相对误差分别为1.51%和2.99%,且在不同参数数量和初值下都能稳定收敛,从而验证了该方法的有效性.To solve the problem of high difficulty or response distortion in the full-scale test of large tunnels and engineering structures, a numerical-physical coupling test method for equivalent whole-structure loading was proposed for global static problems of large tunnels and underground engineering structures. Based on the idea of combining numerical simulation with physical tests, several full-scale component tests were performed in the physical space while numerical modeling and calculation were carried out on the complete underground structure in numerical space in the process of the proposed method. To approximate the real structural response simultaneously, a real-time interaction correction between the two spaces was conducted based on the parameter identification module and the equivalent loading module. A numerical simulation of the numerical-physical coupling test process was carried out by replacing the real tests on basic segment components in physical space with numerical tests. The results show that the responses obtained from the numerical-physical coupling test are closed to the real responses of the whole-structure test. The average errors of the displacements and strains are 1.51% and 2.99%, respectively, while the test results can converge under different parameter numbers or initial values, which verifies the effectiveness of the proposed method.

关 键 词：地下结构 试验方法 数物融合试验方法 数值验证 静力响应 

分 类 号：TU311[建筑科学—结构工程] P315.9[天文地球—地震学]