CAJ | 학술논문

为了研究PEC柱（ partially encased concrete column ）－型钢梁半刚性框架的受力特点、滞回性能、延性及破坏模式，对PEC柱－型钢梁顶底角钢连接的半刚性框架进行了低周反复荷载试验。试验共设计了三个框架，参数为轴压比和螺栓边距。通过试验数据得到了此类框架的滞回曲线、刚度退化、延性系数等抗震性能指标，分析了顶底角钢节点的初始转动刚度。试验结果表明：增大轴压比可以提高半刚性框架的极限承载力，承载力提高了8．9％；但延性有所降低，平均位移延性系数减小了37．9％；减小螺栓边距可以提高节点初始刚度，减缓刚度退化，增加框架延性；PEC柱－型钢梁顶底角钢连接的半刚性框架滞回曲线饱满，具有良好的抗震性能。
위료연구PEC주（ partially encased concrete column ）－형강량반강성광가적수력특점、체회성능、연성급파배모식，대PEC주－형강량정저각강련접적반강성광가진행료저주반복하재시험。시험공설계료삼개광가，삼수위축압비화라전변거。통과시험수거득도료차류광가적체회곡선、강도퇴화、연성계수등항진성능지표，분석료정저각강절점적초시전동강도。시험결과표명：증대축압비가이제고반강성광가적겁한승재력，승재력제고료8．9％；단연성유소강저，평균위이연성계수감소료37．9％；감소라전변거가이제고절점초시강도，감완강도퇴화，증가광가연성；PEC주－형강량정저각강련접적반강성광가체회곡선포만，구유량호적항진성능。
In order to study the mechanical behavior , hysteretic behavior , ductility and failure mode of semi-rigid frame of PEC column -steel beam , three specimens were designed and tested under low frequency cyclic load-ing.The parameters were the axial compression ratio and angle bolts margins .Based on the experimental study , hysteretic curves , stiffness degradation and ductility factors and other seismic performance results were obtained , the initial rotational stiffness of top-seat angle connections were analyzed .The results show that the increasing of ax-ial compression ratio can improve the ultimate bearing capacity of semi-rigid frame, the bearing capacity increased 8.9%,but also reduce the ductility of the frame ,the average displacement ductility factor decreased 37.9%; re-ducing the angle bolts margins can improve initial rotational stiffness of the joint , reduce the stiffness degradation and increase the ductility of the frame;semi-rigid frame of PEC column-steel beam connected with top-seat angle connections has full hysteretic curves shape and good seismic performance .