Study On New Type Bracing Structure Systems For Crossovering Pipelines

New type bracing structure systems for overriding pipes have been studied by the means of theory analysis and simulation analysis in this thesis. Numerical simulation model of new type bracing structure has been founded.Static analysis,modal analysis,anti-wind analysis and anti-seismic analysis for new type of bracing structure has been finished.Designing method of new type of bracing structure has been put forward.The main contents and results of this thesis are as followed:1 New type bracing structure systems for overriding pipes have been designed.2 Mechanics model for new type bracing structure for overriding has been founded by the engineering software ANSYS,sourse program has been written。3 Static analysis of the mechanic model has been finished.When being analyzed,the geometric nonlinearity and the stress stiffness of the cable system are considered.By static simulation analyzing,the internal force and deformation under the acting of gravitation of the new type has been concluded.The analysis method for the internal force of the suspension cable is given out.Compared with simulating answer,they correspond well. Mechanic analysis can been done by thoery method.4 Modal analysis of the mechanic model has been finished.Subspace iterative method and broad-sense Jacobi iterative solution method has been used. The dynamic character,vibration types,and the natural frequencies have been obtained.Using the simplification formula of suspension bridge's basic natural frequency from《General Code for Design of Highway Bridges and Culverts》,the answer is resemble the simulation one.It was proved that such method can be used in basic model analysis of the structure system.5 Anti-wind analysis of the mechanic model has been finished.According to《General Code for Design of Highway Bridges and Culverts》,the imitating-static wind load is input by transversing-bridge direction.The internal force and deformation under the acting of wind load has been concluded.6 Anti-seismic analysis of the mechanic model has been finished.The seismic fortification intensity is 7°. The earthquake action is input by transversing-bridge direction. The El Centro wave is adopted. The internal force and deformation under the acting of earthquake has been concluded.It was proved that such systems have anti-seismic ability.7 Design method and code of new type of bracing structure has been put forward.