Influence of vertically continuous partial wall on strength and deformation capacity of reinforced concrete frame structures

然而，连接上下梁的墙壁，除了两侧柱，在本研究中简称为“局部墙”，由于缺乏承重墙的要求，通常被视为非结构单元。但实际上它们的刚度、强度和峰后性能对结构的抗震性能有很大的影响。特别是对于剪切破坏类型的局部墙体，影响一定更大，因此在本研究中，进行了以下的经验和数值研究。2层跨钢筋混凝土框架试件的静载试验和振动台试验，其中柱超设计系数和墙体呼吸变化为部分剪力破坏型。6层钢筋混凝土框架剪力破坏型局部墙体的柱过设计系数和墙体呼吸变化的侧翻分析。所获得的知识可以总结如下。墙体剪切破坏使层间发生漂移，破坏墙体所在层间比其他层间进展更大。在柱超设计系数较差的情况下，墙体剪力破坏引起多层建筑的层倒。静载试验和振动台试验的总体性能基本一致。有一种情况是，即使框架的柱超过设计系数为3.0，通常被认为足够高，但由于墙壁的存在，倒塌机制也会发生部分变化。即使当柱的设计系数足够高以避免部分倒塌机制时，楼层漂移也倾向于集中在有墙破坏的楼层，其在高度方向上的分布与没有墙的框架的分布有很大的不同。

Walls connected to the upper and the lower beams, however, apart from both side columns, briefly called "Partial walls" in this study, are generally treated as nonstructural elements because of the lack of the requirement for bearing walls. However actually their stiffness, strength, and post-peak behavior must have great influence on seismic behavior of the structures. Particularly as for shear failure type partial wall, the influence must be greater, therefore in this study, the following empirical and numerical investigations were conducted.1. static loading test and shaking table test for 2story lspan RC frame specimens with shear failure type partial walls in which column over design factors and breath of the walls are varied.2. Push-over analyses for 6story RC frames with shear failure type partial walls in which column over design factors and breath of the walls are varied.Obtained knowledge can be summarized as follows.1. Shear failure of a wall makes story drift at the story where the failed wall exists progress more than other story. In the case column over design factor is poor, shear failure of a wall causes story collapse in multi-story buildings.2. Overall behaviors of the specimens for static loading test and for shaking table test are almost coincident.3. There is a case that the collapse mechanism changes to partial one due to the presence of the walls, even when the frame has the column over design factor of 3.0 that is considered sufficiently high in general.4. Even when column over design factor is high enough to avoid partial collapse mechanism, story drift tends to concentrate to the stories where he walls failed and its distribution in height direction becomes considerably different from the one for the frame without the walls.