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

然而，除了两边的柱子外，连接到上下梁的墙通常被视为非结构构件，因为没有对承重墙的要求。然而，实际上它们的刚度、强度和峰后行为必然对结构的抗震性能有很大的影响。特别是对于剪力破坏类型的部分墙体，其影响必然较大，因此，本文进行了以下的经验和数值研究。本文主要研究内容如下：1.对2层大跨度钢筋混凝土框架剪力墙试件进行了静载试验和振动台试验。对六层钢筋混凝土框架剪力破坏型局部墙体进行了Push-over分析，其中柱过顶设计因素和墙体的透气性都不同。墙体的剪切破坏使楼层在墙体破坏所在的楼层比其他楼层更容易发生漂移。在柱跨设计系数较差的情况下，墙体的剪切破坏会导致多层建筑的楼层倒塌。静载试验和振动台试验试件的整体性能基本一致。有一种情况是，由于墙的存在，即使框架的柱超过设计系数3.0，通常被认为是足够高的，倒塌机制也会改变为部分倒塌机制。即使在柱上设计系数足够大以避免部分倒塌机制的情况下，层漂移也往往集中在墙体破坏的楼层上，其高度方向的分布与无墙体框架的情况有很大不同。

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.