中震下针对墙肢名义拉应力超限的型钢配置设计方法

高烈度地区的超高层剪力墙结构在设防烈度地震作用下,对结构进行中震不屈服分析时墙肢可能产生拉应力,需要配置型钢才能满足抗震性能的要求。结合设计实践中对高烈度地区剪力墙名义拉应力超限问题的深入研究,提出了设防烈度地震作用下,剪力墙名义拉应力超限配置型钢的实用计算方法,特别针对在设计中墙肢含钢率超过2.5%时,应对含钢率进行适当比例放松的技术要求,推导出具体的计算公式,讨论了型钢在墙肢中布置的合理设计方法。

Design Method of Profile Steel for Over-Limit of Nominal Tensile Stress of Wall and Limb under Medium Earthquake

High-intensity region of super-high-rise shear wall structure under the action of fortification earthquake, the tensile stress of the wall limb may be produced when unyielding analysis of medium earthquake for structure, and the profile steel needs to be configured to meet the seismic performance requirements. Combined with the in-depth study on the problem of the nominal tensile stress over-limit of shear walls in high-intensity areas in design practice, put forward under the action of fortification earthquake, shear wall nominal tensile stress over-limit configuration profile steel of practical calculation method, especially for the wall limb in the design of steel ratio exceeds 2.5%, the technical requirements for the appropriate proportion of steel ratio should be relaxed, the specific calculation formula is derived, and the reasonable design method of the layout of the profile steel in the wall limbs is discussed.