摘要
为了解麦积山特长公路隧道施工期结构可靠性,确定影响结构可靠性的主要因素,基于连续介质模型,运用PFEM、Latin hypercube MC、可靠度灵敏度等方法和手段,研究了衬砌结构可靠度。计算结果显示,麦积山隧道右线衬砌结构可靠指标为3.8,结构失效概率小;现场测试也表明,支护及衬砌结构安全。文章论述的将一般工程结构可靠度理论与衬砌结构特点相结合、定量计算与定性分析相结合、现场测试与理论计算相结合,可全面反映衬砌结构可靠性水平;可靠度、灵敏度分析有助于确定影响可靠度的主要随机变量,从而针对可控因素,可合理确定提高结构可靠度的措施。
In order to determine the structural reliability of the Maijishan to discover the main factors affecting its structural reliability, PFEM, Latin other methods were used to analyze the reliability of the lining based extra-long mountain highway tunnel and hypercube MC, sensitivity analysis, and continuous medium model. Calculations showed that the reliability index of the lining structure for the right line of the Majishan tunnel is 3.8 and the structure has a low probability of failure. A site test also showed that supporting with the lining structure is safe. It is concluded that the reliability of a lining structure can be fully indicated by combining the reliability theory of structural engi-neering with features of the lining structure, quantitative calculation, qualitative analysis, site tests and theoretical cal- culations. A sensitivity analysis of reliability can help determine the main random variable affecting the reliability as well as reasonable measures to improve structure reliability accordingly.
出处
《现代隧道技术》
EI
北大核心
2012年第6期62-69,共8页
Modern Tunnelling Technology
基金
西部交通建设科技项目(200131800071)
甘肃省交通厅科技项目(2005004)
关键词
公路隧道
衬砌结构
结构可靠度
灵敏度
现场测试
Highway tunnel
Lining structure
Structure reliability
Sensitivity
Site test
