基于性能的钢网格墙抗震设计方法研究
Research on Performance-Based Seismic Design Method of Steel Grid Walls
钢网格墙具有良好的刚度、延性和抗侧承载力,现行钢板剪力墙设计规范并不适用于钢网格墙。为完善钢网格墙的抗震设计方法,本文提出基于性能的钢网格墙抗震设计方法(PBSD法)。该方法基于钢网格墙的性能特点确定了钢网格墙结构的抗震性能目标、失效模式和屈服位移;基于能量守恒原理计算出结构在给定地震作用下的设计基底剪力;基于结构在地震作用下的侧向力分布模式计算得出地震水平力的分布;推导了钢网格构件的塑性设计公式及边缘梁、柱的弹性设计公式。为验证方法的可行性,对某钢框架-钢板剪力墙结构按照钢框架-钢网格墙结构重新设计,并采用该方法对重新设计的结构进行弹性分析和动力弹塑性分析,为钢网格墙结构抗震设计提供了参考依据。
The existing specifications are more perfect for the design method of steel plate shear wall, but there is a lack of research on the design method of steel grid wall, which has enough stiffness, ductility and lateral bearing capacity. In order to improve the seismic design of steel grid wall system, this paper proposes a performance-based seismic design (PBSD) method of steel grid wall. Based on the performance characteristics of steel grid wall structure, the seismic performance target, failure mode and yield displacement of steel grid wall structure are determined. Based on the principle of energy conservation, the design base shear force of the structure under a given seismic level is calculated. The distribution of seismic horizontal force is obtained based on the lateral force distribution mode of the structure under earthquake. The plastic design formulas of steel grid members and the elastic design formulas of edge beams and columns are derived. In order to verify the feasibility of the proposed method, the method is used to redesign the actual steel frame-steel plate shear wall structure into steel frame-grid wall structure, and the elastic analysis and dynamic elastic-plastic analysis of the redesigned structure are carried out to provide reference for the seismic design of steel grid wall structure.
钢网格墙 / 基于性能的抗震设计 / 失效模式 / 目标位移 / 塑性设计
steel grid wall / performance-based seismic design / failure mode / target displacement / plastic design
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国家重点研发计划(2019YFD1101005)
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