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单个结构单元的非线性分析说明,在异型柱框架中添加了人字形支撑后,结构的抗扭刚度和抗扭承载力有显著提高,延性也有所提高。通过对异型柱框架结构和矩形柱结构进行地震作用下的对比分析,说明异型柱框架的抗扭性能要远低于等惯性矩的矩形框架结构,添加斜支撑对提高异型柱框架抗震性能有显著作用。本文采用有限元程序Ansys和SAP,对异型柱框架结构和异型柱加斜支撑结构进行了空间受力分析,并建议在刚心与质心不一致的异型柱框架结构中,适当使用斜支撑结构以便提高结构抗扭性能。
The nonlinear analysis of a single structural unit shows that after the herringbone brace is added to the special-shaped column frame, the torsional stiffness and the torsional load resistance of the structure are significantly improved, and the ductility is also improved. Through the comparative analysis of the special-shaped column frame structure and the rectangular column structure under earthquake action, it shows that the torsional performance of the special-shaped column frame is much lower than the rectangular frame structure with equal moment of inertia. Adding the diagonal brace can improve the seismic performance of the special-shaped column frame effect. In this paper, the finite element program Ansys and SAP, special-shaped column frame structure and special-shaped column plus oblique support structure for space force analysis, and proposed in the just center and center of gravity non-uniform shaped column frame structure, the appropriate use of diagonal support structure in order to improve Structural torsion resistance.