摘要
本文对九根不同轴压比的钢筋混凝土悬臂柱进行了不同加载路径下静力周期反复荷载的试验研究。加载路径有单八字形、方形和圆形三种,并对变轴力加载情况作了初步探讨。主要讨论了加载路径和轴压比对构件强度和延性等抗震性能的影响。试验结果表明:加载路径对柱的强度和延性以及钢筋的粘结滑移等有明显影响;柱内存在明显的双轴耦合作用;变轴力加载使柱的延性和刚度比定轴力加载有所下降。
The seismic behavior of reinforced concrete (R.C.) slender columns subjected to biaxial lateral load reversals is experimentally investigated in this paper. A series test of R.C. cantilever columns with various axial load levels are performed under the static cyclic loads with three different kinds of loading paths. The loading paths are the single eight mode, the square mode and the circle mode. Meanwhile, the case of changing axial loads is discussed. The effects of the loading paths and axial loads on the strength and ductility of specimens are mainly analyzed. The results of tests indicate that the loading paths influence the strength and the bond-slip of longitudinal steel bars greatly; there is obvious biaxial stiffness coupling in the columns; the strength and ductility of columns subjected to changing axial loads are reduced compared with columns under constant axial loads.
出处
《土木工程学报》
EI
CSCD
北大核心
2003年第5期71-75,共5页
China Civil Engineering Journal
