Reliability Analysis Of Joints In Immersed Tunnel Under Earthquake Action

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.