【作者】 周莹；

【导师】 盛克苏；

【作者基本信息】 暨南大学 ， 结构工程， 2008， 硕士

【摘要】 随着我国经济的发展,航运贸易量也快速增长,对江河流域、海湾区域的交通和运输系统的设计提出了新的要求。沉管隧道因能很好的处理在此类水域的道路穿越问题和航运问题,同时又降低了对周围环境的影响,越来越受到国家的重视,因而沉管隧道在我国快速的发展起来。然而,沉管隧道一般修建在软弱地层中,埋置浅,受地震影响大,同时由于沉管隧道的重要性及其在水下的特殊性,一旦破坏将产生灾难性的后果,且沉管隧道在地震作用下最薄弱的地方是接头部位,因此,对沉管隧道接头部位在地震作用下产生的响应进行动力可靠度计算是非常有必要的。结构动力可靠度理论,是一门新发展起来的边缘,交叉学科。它用结构理论,振动理论和概率论相结合的方法,研究结构动力可靠度的分析方法,以及基于可靠度的结构动态设计方法。采用动力可靠度理论中的首次超越破坏机制,对计算地震动作用对地下结构产生的响应的可靠度是非常合适的。论文的研究工作主要包括以下两个方面:1.沉管隧道整体随机地震响应分析研究。本文以建造中的广州市洲头咀沉管隧道为研究对象,将隧道地震分析的弹簧一质量模型应用于沉管隧道随机地震响应计算,并采用Newmark隐式时间积分法和弹性地基梁法,编制相应的计算程序,研究沉管隧道在地震作用下的地震响应,并提取三个接头处的地震响应。2.沉管隧道接头处的动力可靠度研究。利用首次超越破坏理论中的Poisson假设超越机制为动力可靠度分析基础,对三个接头处的地震响应进行了可靠度计算,并取得初步成果。本文的研究工作对实际工程有一定的参考价值。更多还原

【Abstract】 Along with the development of economy , the shipping trade volume increased quickly . It put forward new requirements to the transportations systems . The immersed tunnels could deal with the navigation problem , and also decrease the effect caused by the surrounding environment. So , it was become more and more useful to the government, with development quickly in our country . However, immersed tunnels are generally build in soft soil shallowly and affected greatly by the earthquake . In view of its importance and underwater particularity , the destruction of immersed tunnels will be disastrous . And the earthquake in the immersed tube tunnel under the weakest is the joint position, therefore, the immersed tube tunnel connector under earthquake site in response to the calculation of power reliability is very necessary . Structural Dynamics reliability theory is a new development to the edge, cross-discipline. It used structure theory, probability theory and vibration theory of combining method to study the reliability of the power structure analysis, based on the reliability of the structure and dynamic design . Reliability theory of using force beyond the first damage mechanism, calculated to shock the role of the underground structure of the reliability of the response is very appropriate .Among the research work include the following two aspects .1. Immersed tube tunnel overall analysis of random earthquake response. In this paper, taking Guangzhou City ZhouTouZui immersed tube tunnel as example, seismic analysis of the tunnel will spring a quality model for immersed tube tunnel random earthquake response, and use of Newmark implicit time integration and flexible foundation beam, The preparation of the calculation procedure, research immersed tube tunnel under earthquake in the earthquake response and three joints from the earthquake response.2. Immersed tube tunnel joint study on the reliability of power. Damaged beyond use the first time in the theory of Poisson hypothetical mechanism as the driving force beyond reliability analysis based on the three joint response to the earthquake reliability, and achieved initial results .This paper studies of the actual works have a certain value.更多还原