基于纤维模型的地下交通箱型隧道数值分析
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（1 青岛理工大学土木工程学院，青岛 266033 2青岛艾璧希建筑科技咨询公司，青岛 266033）
[摘要] 用等价粘性阻尼系数对既有的箱型钢筋混凝土地下结构模型试验的耗能性能进行了评价；利用M-Φ关系和纤维模型分别对试验体进行了数值分析，分析结果表明，纤维模型因考虑开裂后构件的伸长受约束而导致轴压增大、抗弯强度提高，计算结果与实验结果吻合良好。[关键词] 箱型隧道；等价粘性阻尼系数；纤维模型中图分类号：TU921 文献标识码：A 文章编号：1002-848X(2013)S2-0088-04作者简介：陈霄，硕士研究生，526064013@qq.com。Numerical Analysis of underground box tunnel based on fiber modelChen Xiao1, Tian Li1, Jiang Zhu1,2（1 School of Civil Engineering ,Qingdao Technological University, Qingdao 266033, China; 2 Qingdao ABC Construction Technology Consulting Company, Qingdao 266033, China）Abstract：The energy consumption performance of an existing underground structure experiment of reinforced concrete box-model was evaluated numerically by equivalent viscous damping coefficient in this paper. According to the M-Φ relationship and fiber model, the numerical analysis of the experiments was carried out. The results show that the numerical simulation results is close with the experimental data，because the constraint of member elongation caused by concrete crack has been considered in fiber model.Keywords：box tunnel;equivalent viscous damping coefficient;fiber model
