地震作用下短肢剪力墙结构的协同工作分析

Analysis of Interactive Short-limb Shear Wall Structures under the Action of Earthquake

通过对短肢剪力墙结构在地震作用下的协同工作分析,建立了楼层单元力学模型,并在假设连梁两端为铰支的条件下得到了短肢剪力墙内力和位移的计算公式。算例分析表明,即使在各墙肢等效抗弯刚度相等时,外侧墙肢所承担的地震作用剪力较大,但各短肢剪力墙墙肢所承担的地震作用剪力可近似地按抗弯刚度分配。短肢剪力墙结构的变形曲线为弯曲型,仅与总的等效抗弯刚度有关,而与各墙肢等效抗弯刚度的分配无关。

Based on analysis of interactive short-limb shear wall structures, an unit mechanical model of building is founded and the formulae between inner forces and displacements of short-limb shear walls under the action of earthquake are obtained on the condition of presuming joint support at the ends of connected beams. According to the detailed examples, the shear force of a short-limb shear wall is approximately distributed with its bending stiffness, although the shear force acting on the outer short-limb shear wall is bigger when all the short-limb shear walls have the same bending stiffness. The deformation of short-limb shear wall structure is bend and is only related to general bending stiffness of all the short-limb shear walls.