砖混组合结构特征刚度系数对混凝土墙数量的影响

Influence of masonry-RC wall composite structures' stiffness characteristic coefficient on the optimal quantity of concrete walls

根据砌体墙钢筋混凝土墙组合结构的受力特点,提出了在地震作用下混凝土剪力墙合理数量的计算公式,公式中混凝土墙数量的取值参数的主要影响因素为:场地特征周期、抗震设防烈度、弹性层间位移角限值、组合结构特征刚度系数、非承重墙的自振周期折减系数等。并针对刚度特征系数这一主要影响因素,给出混凝土剪力墙合理数量计算公式中混凝土墙数量的取值参数在不同抗震等级、不同场地类别和设计分组的情况下的取值表。算例表明方法简单实用,可用于地震区此类组合结构的初步设计阶段。

According to the stress characteristics of masonry-RC wall composite structures, the paper puts forward the calculation formula of the optimal number of RC walls under the action of earthquake. In the formula, the main influence factors of parameter of amount of RC walls are： the characteristic site period, the seismic fortification intensity, the elastic allowable deformation value, the stiffness characteristic coefficient of composite structures, the compensation-coefficient of the non-bearing walls on natural period of vibration,etc. According to the main influence factor, the stiffness characteristic coefficient masonry-RC wall composite structures;the stiffness characteristic coefficient λ; optimal amount of RC walls; the parameter of amount of RC walls value tables, , this study gets the value tables of parameter of amount of RC walls in the calculation formula of the optimal quantity of concrete wall under various anti-earthquake grades,ground categories and design groups. A numerical example shows this method is simple and practical. It can be used for the initial design stage of this kind of composite structures in seismic regions.