Study on seismic performance of concrete composite wall with built-in bidirectional steel frame based on dynamic elastic-plastic analysis
The steel plate concrete composite shear walls give full play to the material advantages of steel,exhibiting excellent seismic performance,but causing significant construction difficulties in engineering applications.The concrete composite wall with built-in bidirectional steel frame studied in this article are concrete walls with horizontal and vertical steel frames intersected inside,which show characteristics of higher construction efficiency and lower construction cost.Compared with the steel plate concrete composite walls,there are few research results on the concrete composite wall with built-in bidirectional steel frame,and their seismic performance has not been researched sufficiently.In this article,an engineering example originally using steel plate-concrete composite walls is selected,and the steel plate-concrete composite walls in the example are replaced with concrete composite wall with built-in bidirectional steel frame with a similar steel ratio.The universal finite element software is used to perform dynamic elastic-plastic analysis on four examples under rare earthquake conditions,comparing the seismic performance differences of the overall structure and two different forms of composite walls themselves.It is found that the concrete composite wall with built-in bidirectional steel frame has higher compressive damage levels and a larger damage range,and its bearing capacity is lower than that of steel plate-concrete composite walls.Replacing the steel plate-concrete composite wall in the structure with a concrete composite wall with built-in bidirectional steel frame has a small impact on the natural vibration characteristics,the elastoplastic dynamic response and the damage of the components.The structure can still meet the performance requirements of not collapsing during strong earthquakes.
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