Shaking table test on insulated sandwich concrete wall building structure
Shaking table test on insulated sandwich concrete wall building structure
复制标题
保温夹芯混凝土墙建筑结构的振动台试验
DOI：
10.1016/j.jobe.2021.102165
复制
发表时间：
2021-01-13
影响因子：
6.4
通讯作者：
Wang, Zexiong
中科院分区：
文献类型：
--
作者：
Qiao, Wentao;Kane, Jialing;Wang, Zexiong
针对混凝土夹芯板存在的冷桥、连接不牢固、延性差等问题，提出了一种新型的混凝土保温夹芯墙结构。为研究ISCW结构的抗震性能，对一栋3层ISCW结构1：3缩尺模型进行了振动台试验。结果表明，ISCW建筑结构具有较大的刚度，在小震作用下能够在弹性状态下工作。随着PGA的增加，结构刚度不断退化，结构进入塑性状态，但退化过程相对缓慢。裂缝或损伤主要发生在一层大开洞的墙体上，但不蔓延，未发生倒塌。通过合理布置冷弯薄壁钢管柱，可显著提高结构的整体性和延性。试验中输入了三种地震波，引起了结构明显不同的反应。因此，在对ISCW结构进行地震反应分析时，地震动谱特性是不可忽略的。
To solve the problems of concrete sandwich panels such as cold bridge, weak connection, and poor ductility, a new configuration, namely the insulated sandwich concrete wall (ISCW) is proposed in this paper. Shaking table test is performed on a 1:3 scaled model of 3-storey ISCW building structure to study the seismic behavior of an ISCW structure. Results indicate the ISCW building structure has large stiffness and can work in elastic state under small earthquakes. The stiffness degrades continuously and the structure arrives in a plastic state as the PGA increases, but the degradation process is relatively slow. The cracks or damages mainly occur on the wall with big opening of floor one, but they do not spread through the walls and no collapse happens. With a rational arrangement of the cold-formed thin-walled steel tube columns, the structural integrity and ductility are significantly improved. Three types of seismic waves were input in the test, and significantly different structural responses were caused. Hence the ground motion spectrum characteristics cannot be ignored when the seismic response of an ISCW building structure is analyzed.