水平双向加载条件下钢筋混凝土核心筒抗震性能试验研究

为了研究多维地震作用下钢筋混凝土核心筒结构的抗震性能，对2个尺寸配筋相同的钢筋混凝土核心筒试件分别进行了水平单向加载和水平双向加载条件下的拟静力试验。重点比较了双向加载对核心筒的破坏形态、破坏机理、承载能力、耗能能力、延性等方面的抗震性能的影响。结果表明：水平双向加载对核心筒抗震性能有显著影响，水平双向荷载作用使得核心筒的承载力较单向荷载作用明显下降，同时严重削弱了筒体变形和延性性能。初步研究结果显示仅考虑单向地震动作用分析混凝土核心筒结构的抗震能力可能严重偏于不安全，应引起学术和工程界的高度重视。

Seismic behavior of reinforced concrete core walls under biaxial cyclic lateral loading

In order to study the seismic behavior of reinforced concrete core wall under multi-dimensional loading, two reinforced concrete core wall models were built and tested to failure. One wall model was under uniaxial cyclic lateral loading and the other was under biaxial cyclic lateral loading. This paper presents the results, including failure mode, hysteretic behavior, load-carrying capacity, ductility, energy dissipation ability. It can be seen that the biaxial cyclic lateral loading has important effect on the seismic behavior of reinforced concrete core wall. Under biaxial cyclic lateral loading, stiffness and load-carrying capacity of the specimen are decreased and the ductility performance is reduced markedly.