Stress Analysis Of Concrete Filled Steel Stub Frame-Shear Wall Structure With Semi-Rigid Connections

Steel concrete frame-wall structure with its very good seismic performance is widely used in high-level frame-wall structure. The traditional frame-wall structure in accordance with rigid beam-column joints is to calculate the design, and steel concrete columns and beams connected neither completely rigid nor fully articulated, but somewhere in between rigid and semi-rigid articulated then. Not reported in the literature of domestic steel concrete frame-wall structures for the design calculations, so the actual design of engineering structures are designed according to the traditional approach assumes that concrete filled steel tube frame and column to connect the node to the ideal completely rigid or articulated. In fact, the stiffness of beam-column joints the size of the overall structure of the performance can not be ignored. Therefore, to explore the size of the beam-column joint stiffness and structural deformation of the seismic performance for steel concrete structures in practical engineering application of important guiding significance.This article uses a general purpose finite element software sap2000modal analysis of concrete filled steel tubular frame structure under different joint stiffness, the displacement of several factors affect the concrete filled steel tubular frame structure, the conclusion that the structural stiffness characteristic value is the most major factor, using finite element analysis and design charts of lateral flexibility factor, the use of design charts and the rigid frame structure calculation formula can be more accurate prediction of the lateral displacement of the semi-rigid connection frame shear wall structure.Application sap2000flexible, semi-rigid and rigid steel pipe concrete frame share wall structure of the natural period of vibration modes obtained the rotational stiffness of the node, the steady decline in the framework of the natural frequency gradually weakened, the natural period of vibration become larger, so can semi-rigid connection framework structure of the natural period of vibration can change in space. Of flexible, semi-rigid and rigid joints to connect the frame shear wall structure imposed by seismic loading force dynamic response experiment, the different nodes are connected to the top floor displacement response and concrete filled steel tube column base shear response for analysis to get the structure response and incentives based on portfolio quality and structural damping, the system stiffness and the frequency of the seismic forces have a chance to be coordinated, there is no fixed number. Displacement will be bigger than it, do not phase coordination is smaller than the actual response of the structure.