欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
以西南高烈度地震区某拟建隧道为背景，开展了隧道洞口段抗减震振动台模型试验研究。通过对有无减震层体系的对比试验，研究了减震层的减震效果；并针对目前振动台试验普遍采用的多次加载方案产生的损伤累积问题进行了分析，同时给出了围岩和衬砌的裂纹发展过程及破坏形态。结果表明：在围岩与隧道之间设置减震层可以有效减弱围岩与结构之间的动力相互作用，从而起到减震效果；在评价结构抗震性能时需要考虑多次加载产生的损伤累积和裂纹效应的影响。研究结果可为结构在地震作用下的开裂分析提供参考。
英文摘要：
Based on the background of tunnels constructed on high-intensity earthquake zone in southwest China, the large-scale shaking table tests were accomplished for studying the seismic capability of the entrance of double track tunnels. The seismic mitigation effect was discussed through the comparison tests of models with and without seismic absorption layer. The effect of damage accumulation caused by multi-loading scheme was analyzed. The propagation process and damage patterns of cracks on surrounding rock and tunnel lining were described. Results show that a seismic absorption layer covered between surrounding rock and tunnel can reduce the dynamic interaction between the surrounding rock and lining structure effectively, meanwhile, the effect of damage accumulation and cracks due to multi loading scheme should be considered under the evaluation on the seismic capability of tunnels. The results provide a reference for cracking analysis of tunnels under seismic action.
同期刊论文项目
同项目期刊论文
期刊信息
位置：