【摘要】 设计制作了预制装配式混凝土梁柱节点试件,对其进行了低周反复荷载作用下的性能试验,采用ABAQUS有限元软件对装配式混凝土梁柱节点进行了非线性数值仿真分析,并对数值仿真分析结果与试验结果进行了对比分析,确定数值仿真分析的合理性。在此基础上,分析了不同轴压比以及后浇区不同混凝土强度等级、钢筋强度等级、后浇区长度对构件的刚度、屈服荷载和极限荷载、耗能等性能的影响。分析结果表明:数值仿真分析结果与试验结果吻合较好;轴压比、后浇区材料强度对构件的初始刚度影响较小,而后浇区长度对构件的初始刚度影响较为明显;构件承载力随轴压比提高而降低,而随后浇区长度增加而提高,后浇区钢筋材料强度提高时,构件的极限承载力略有提高;后浇区混凝土强度对构件的耗能性能影响较小,而轴压比、后浇区钢筋强度和后浇区长度对构件的耗能性能影响较为明显。更多还原

【Abstract】 Cyclic loading tests on the prefabricated reinforced concrete beam-column joint are carried out to investigate its seismic performance,and numerical simulation model based on finite element software ABAQUS is established and validated by comparing with experimental results. On this basis,nonlinear numerical analyses are conducted to make parametric study,which include the axial compression ratio,the concrete strength,the intensity of steel bar,the length of later pouring zone,etc. And the influences on stiffness,yield strength,ultimate bearing capacity of the specimen and energy dissipation are analyzed. The results indicate that the simulation results agree well with the test results. Besides,for different design parameters,the length of later pouring zone has great impact on the initial stiffness of the specimen,while the axial compression ratio and strength of concrete and steel bars don’ t. The ultimate bearing capacity of the specimen reduces with the increase of axial compression ratio,but amplifies with the increase of length of later pouring zone. However,the increase of strength of concrete and steel bars has a very limited improvement of the ultimate bearing capacity of the specimen. Different design parameters,the intensity of steel bar and the length of later pouring zone have great impact on the energy dissipation of the specimen,while the strength of concrete doesn’t.更多还原