In this paper, the application of finite element software with the actual structure of the field static load test for the engineering background, describes the space effect of portal frame under vertical load. Established a gymnasium mode of portal frame through the finite element software, quantitative analysis the space effect under the vertical load, and studied the spatial interaction of longitudinal anti-lateral component to the overall structure, and compared with the results of the field static load test. The calculation results show that, the reduction of spatial effect to internal forces under the vertical load should be considered in design. It is important that a reasonable increase in rigid tie and support can enhance the space effect of the whole portal frame.
As a new seismic technique, the input acceleration is reduced effectively by the isolation technology. The social benefit of seismic isolation technology has been proved, but the economic effect still remains an insufficient understanding. Regarding that, this article take the actual projects as the background to analysis the isolation structure’s economic effect qualitatively, summed up a selection criteria of the isolated structure, lays a foundation for the promotion and application of the isolation technology
At present, great progress had been achieved in the theoretical research of pile-soil interaction. The principle for “main structure, secondly calculation” was traditionally adopted in engineering practice, “Full pile layout” and “Equal capacity pile layout” were still the basic pile layouts. An optimal unification was not reached among economy,safety and reasonable of building, plenty of capital and material were wasted,and unsafe hidden dangers were showed in engineering.Therefore, influences of raft thickness and different pile layouts for raft settlement and pile top reaction were analyzed by ANSYS in this paper,mechanical behavior and interaction mechanism beteewn pile raft foundation were researched. Pile raft foundation was designed optimally by using the optimization method of pumping pile. Finally, many significant conclusions were put forward.
In order to get over the defects of traditional sliding base isolation structure which the reactions of traditional sliding structure has always increased during the earthquake, and obtain sliding base isolation technology application for the frame structure. Based on the research of U work performances of energy-absorbed element, the whole element model of this new kind of sliding base isolation three storey frame structure with equipment of sliding-limit was established by the SAP2000 software. According to reasonable hysteretic mode, the calculation analysis under collision responses were carried out. The calculation results showed that the rigidity of the new sliding-limit had a great influence on changes of the storey acceleration and displacement after collision. The maximum base sliding displacement of both earthquakes loading was obviously bigger than that of a single earthquake loading. With the other direction loading earthquake increasing, the maximum base sliding displacement of the structure showed signs of increasing first, and then decreasing. Effective theoretical basis of sliding base isolation technology being applied to the frame structure were provided.
In the service of sliding isolated structure, the slip component damage degree determines the safety of sliding isolated structure. The seismic response analysis about a sliding isolated frame structures was obtained by the finite element analysis software SAP2000 at various loads and compared with the traditional structure. Seismic response differences between slip component of the different forms and number damage was studied. According to Teflon invalid and the displacement-limited of energy dissipation component invalid, the impact of seismic response owing to slip component damage was analyzed. It will provide a reference for the isolated building design, the effective maintenance and damage detection.
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