钢筋混凝土框架异型节点抗震性能试验研究(英文)

Experimental research on seismic behavior of abnormal joint in reinforced concrete frame

基于9个钢筋混凝土框架平面异型节点、1个空间异型节点的拟静力试验和1个火力发电厂结构模型的拟动力试验,分析了异型框架节点的受力机理和抗震性能.提出了由小梁小柱决定的“小核芯”概念,得出框架异型节点的承载能力取决于异型节点“小核芯”的结论.同时研究了梁柱截面变化、轴压力和水平箍筋对异型节点抗剪性能的影响,最后以“小核芯”为基本分析单元提出钢筋混凝土框架异型节点的抗剪承载能力计算公式.

Based on nine plane abnormal joints, one space abnormal joint experiment and a pseudo dynamic test of a power plant model, the work mechanism and the hysteretic characteristic of abnormal joint are put to analysis in this paper. A conception of minor core determined by the small beam and small column, and a conclusion that the shear capacity of abnormal joint depends on minor core are put forward in this paper. This paper also analyzes the effects of axial compression, horizontal stirrups and section variation of beam and column on the shear behavior of abnormal joint. Finally, the formula of shear capacity for abnormal joint in reinforced concrete frame is provided.