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半刚接钢框架内填钢筋混凝土剪力墙(PSFRCW)结构的超强系数受材料力学性能及构件几何尺寸的变异性影响较大。采用的Latin超立方抽样方法考虑了PSFRCW结构中型钢、钢筋及混凝土材料力学性能的随机性,以及内填RC墙厚度、半刚性节点的抗弯刚度及受弯承载力的变异性,结合GB 50011—2010《建筑抗震设计规范》设计了4组共计160个PSFRCW结构算例样本,分析了层数、抗震设防烈度对结构超强系数的影响。采用Pushover方法确定了160个PSFRCW算例分别在均匀分布及广义乘方水平力分布模式下的能力曲线。基于概率方法按置信水平为95%的单侧置信下限值确定了PSFRCW结构考虑层数、抗震设防烈度影响的超强系数。研究表明:考虑材料及构件几何尺寸变异性所确定的PSFRCW结构的超强系数较按材料性能及构件尺寸名义值所确定的PSFRCW结构的超强系数值约大15%。考虑高阶振型影响的广义乘方分布模式确定的PSFRCW结构的超强系数值要小于按均匀分布模式确定的PSFRCW结构的超强系数值。设防烈度相同时,PSFRCW结构的超强系数随层数的增加呈增大趋势。层数相同时,PSFRCW结构的超强系数随抗震设防烈度的增加呈降低趋势。在8度抗震设防区,PSFRCW结构的超强系数建议取为3.5;在9度抗震设防区,PSFRCW结构的超强系数建议取为3.2。
The super-strength coefficient of reinforced concrete shear wall (PSFRCW) structure with semi-rigid connection frame is greatly affected by the mechanical properties of materials and the variability of the geometric dimensions of the components. The adopted Latin hypercube sampling method takes into account the randomness of the mechanical properties of steel, steel and concrete in the structure of PSFRCW, as well as the variability of RC wall thickness, flexural rigidity and flexural capacity of semi-rigid joints, -2010 Code for Design of Seismic Design of Buildings, a total of 160 samples of PSFRCW structure samples were designed and analyzed. The influence of seismic intensity on the superstructure coefficient was analyzed. Pushover method was used to determine the capability curves of 160 PSFRCW examples under uniform horizontal distribution and generalized square horizontal distribution. Based on the lower limit of one-sided confidence level of 95% confidence level based on the probability method, the super-strong coefficient of PSFRCW structural considered layer and seismic fortification intensity are determined. The results show that the super-strength coefficient of PSFRCW structure, which is determined by considering the variation of material and component geometrical dimensions, is about 15% higher than the super-strength coefficient of PSFRCW structure, which is determined by the material properties and the nominal value of the component dimensions. The super-coefficient value of PSFRCW structure determined by the generalized power distribution mode considering the influence of high-order mode shapes is smaller than the super-coefficient value of PSFRCW structure determined by the uniform distribution mode. When the fortification intensity is the same, the super strong coefficient of PSFRCW structure increases with the increase of the number of layers. When the number of layers is the same, the super strong coefficient of PSFRCW structure decreases with the increase of seismic fortification intensity. In 8 degree seismic fortification zone, the super strength coefficient of PSFRCW structure is recommended to be 3.5; in 9 degree seismic fortification zone, the super strength coefficient of PSFRCW structure is recommended to be 3.2.