【摘要】 在对结构进行抗震性能评估及基于性能的抗震设计中,需要求出结构的实际抗震承载力。从我国现行抗震规范入手,对钢筋混凝土框架结构的实际抗震承载力进行研究。首先根据现行规范中构件截面抗震承载力设计表达式,由构件内力组合值的各分项系数并考虑内力调整系数,以及非结构构件和构造配筋的影响,初步计算出构件的超强系数λ;然后对具体结构按现行规范算出结构的实际承载力标准值,得到超强系数λ值;再用ETABS软件对结构进行静力弹塑性分析验证。最后得到混凝土框架结构的超强系数最小值为2。更多还原

【Abstract】 It is necessary to acquire the actual earthquake resistant bearing capacity of a structure during the process of earthquake resistant evaluation and performance-based seismic design.From a viewpoint of current code for seismic design of buildings in our country,the research is performed on the actual seismic bearing capacity of R.C.frame structures.Firstly,Based on the expression of seismic bearing capacity for member’s cross-section in current code and each adjustment coefficient of combination values of internal forces for members,meanwhile considering the adjustment coefficient of internal forces and the influences of nonstructural members and constructional reinforcement,an overstrength coefficient λ of the design value of internal forces for members is calculated preliminarily.Then the overstrength coefficient λ is obtained by a calculation example,which is preceded by calculation of the design bearing capacity and actual bearing capacity on the basis of current code.The building is verified by using a static elasto-plastic analysis method of ETABS.At last,the minimum overstrength coefficient of R.C.frames is achieved to be 2.更多还原