摘要
多维地震对结构构件的破坏作用很大,由于目前还没有很好地建立起恢复力模型并进行非线性动力分析,所以实验作为最直接的手段显得尤为重要。介绍的实验将6根钢筋混凝土柱分成两组,每组3根,在双水平方向施加低周反复荷载,一组施加轴力,另一组施加扭矩,采用了矩形、菱形及椭圆形的位移加载模式。实验结果表明,在施加轴压的情况下,试件滞回耗能强,延性特性明显;而在施加扭转的情况下,试件的滞回耗能差,表现出脆性的破坏特征。在相同的加载模式下,扭转产生的损伤比轴压产生的大。
The mechanism of the multi-dimension earthquake affecting buildings is complicated, therefore, experimental tests become important means to solve the problem. Six specimens of reinforced concrete column divided into two groups were investigated in this paper, one group subjected to axial loading and the other to torsional loading, at the same time they were both under low-cycle loading. Three types of loading modes were analyzed, and the accumulative hysteresis dissipation energy and damage indexes were calculated on the basis of test results. They demonstrate the ductility of the reinforced concrete columns is dominant under axial force, while the brittleness is in evidence under torsional loading.
出处
《结构工程师》
2008年第6期135-139,共5页
Structural Engineers
关键词
多维地震
加载模式
拟静力实验
滞回耗能
损伤指标
multidimensional earthquake, loading mode, quasi-static test, accumulative hysteresis dissipationenergy, damage index
