Seismic Response Analysis Of Large-span Conjoined Structures Under Wave Passage Effect

As the engineering technology developed and the economic level improved, there are more and more large-span building structures. The large-span conjoined building structures due to the particularity of its structure, aroused the wide attention of all. Earthquake occurs frequently in our country, so large-span conjoined structure seismic analysis and design is of great significance to ensure the safety of the building. Because the span of the large-span conjoined building structure is very large, the uniform excitations is quite different from the actual situation. As the related studies shown, in the spatial variation effect of ground motion, the wave passage effect plays the most important role. This paper has mainly analyzed the wave passage effect of the large-span conjoined building structures, and finish the work as the following aspects:(1) The large-span conjoined building structure was simplified, and the equation of large-span conjoined structure under non-uniform excitation was deduced. Simulation calculation was carried out by Simulink in Matlab, which was verified in Midas by establishing the simplified model. Then the wave passage effect on the whole struture was analyzed.(2) The finite element analysis model of the large-span conjoined structure was established in Midas, and the uniform excitation and wave passage excitation were separately carried on the structure. The change of the internal forces under the two seismic excitations were compared. Then the wave passage effect on the internal forces of the local component was analyzed.(3) Taking the actual project as the background, the finite element analysis model was established in Midas. The wave passage effect of the large-span conjoined structures was analyzed. In the.process of annalysis, different wave velocties and different spans of the structure were adopted. The maximum shear force, the maximum floor displacement, the internal forces of the main body and the corridor under the uniform excitation as well as the wave passage excitation were compared. The paper also discussed the change law of the large-span conjoined structure under the wave passage excitation when the span of the structure, wave velocty and the position of floor are different.The equation of large-span conjoined structure under non-uniform excitation deduced and the finite analysis of the large-span conjoined structure in this paper can provide theoretical basis for the research on wave passage effect and reference for seismic design and analysis of the large-span conjoined structures.