型钢混凝土梁柱组合体滞回性能的试验研究

Experiment Study on Hysteretic Behavior of SF-SRC Joints

进行了3组共6个钢纤维-型钢混凝土梁柱组合体试件在低周反复荷载作用下的拟静力试验。采集了试件在各个不同受力阶段的应变、位移以及荷载等数据。介绍了试件的设计,试验过程以及主要的试验现象。给出了试件的滞回曲线,探讨了钢纤维以及箍筋对试件抗震性能的影响,分析了梁筋和梁中型钢的粘结退化机理,指出了贯穿节点梁筋的粘结退化对节点传力机理和试件抗震性能的影响。研究结果表明,此种节点形式具有良好的抗震性能。

A new structural of composite joints of SF-SRC （steel fiber-steel reinforced concrete） is presented in this paper. Six pieces of SF-SRC joints were tested under low cyclic loads. The specimens are divided into three groups. The strain, displacement and loading at every stage of test were gathered. And the details of specimens, process of test and main phenomena of the specimens during the test were introduced. The hysteretic curves, ductility ratio and loading capacity were analyzed. And the effects of steel fiber and hoop on seismic behavior of specimens were discussed. The bond deterioration of bar and steel shapes was studied. It points that bond deterioration has great influence on seismic behavior of specimens and force mechanism of the joints. It shows that this kind of joint has good seismic performance.