Method And Application Of Aseismic Analysis For Large-Scale Aqueduct

The project of transporting water from south to north is a large water conservancy works for relieving the lack of water resources of North-West and North China regions. The aqueduct of the project is the overhead water transporting construction which strides across rivers and roads. There are a few dozens of large-scale aqueducts in the main canal of the project and most of which locates in the regions where the earthquake intensity is VII degree or over VII degree. It is important to insure the seismic design security and economy utilize of the constructions. In this dissertation, the theory and application of seismic analysis for large-scale aqueduct is studied in details and the mostly includes several studies below.1. The seismic response analysis model of thin wall space aqueduct with fluid-structure coupling is established. In this model, transverse deformation, vertical deformation, longitudinal deformation, free torsion deformation, constrained torsion deformation and fluid-structure coupling between aqueduct and water body are all taken into consideration. The bracket distortion and the influence of rubber bearing are also considered. The model is verified by the results of numerical calculation examples of aqueduct.2. The elastic-plastic analysis model of thin wall space aqueduct with multiple springs is presented. The elastic-plastic model is composed of the elastic model of aqueduct and the nonlinear multiple spring model. The influence of dynamical characteristic with section moment and axial distortion is taken into account. The nonlinear hysteretic characteristic of the plastic zone is simulated by the equivalent relationship of the springs.3. The quasi-static seismic-resistance experiment of aqueduct and aqueduct brace specimens has been carried out under low cycle lateral loading. The load-displacement hysteretic loop curve is obtained. The numerical simulative hysteretic loop curve is obtained by use of the elastic-plastic analysis model of thin wall space aqueduct with multiple springs. According to the comparison, the numerical calculated and experimental results agree well. So the elastic-plastic space aqueduct model is verified and the elastic-plastic earthquake response of Guan Di Miao large-scale aqueduct is calculated by use of the numerical analysis model.4. The nonlinear earthquake response of large-scale aqueduct with the lead rubber bearing is studied. The lead rubber bearing has good nonlinear hysteretic characteristic. By use of two...