后张节点钢框架抗震性能研究

Study on seismic performance of the steel frame with post-tensioned connections

梁柱节点的连接性能直接影响钢框架结构在荷载作用尤其是动力荷载作用下的整体行为。后张抗震梁柱节点是一种新型梁柱连接形式。利用转动弹簧模拟后张节点、LINK10单元模拟钢绞线,在有限元软件ANSYS的基础上对后张节点框架进行了动力时程分析,得到了结构在地震作用下的各种响应。通过对顶层位移、底部剪力、层间位移等参数的比较,从强度和变形两个方面检验了后张抗震节点对框架结构抗震性能的影响,说明后张框架在满足变形要求的基础上,能够减少框架内力,使结构及构件趋于安全,具有良好的抗震能力。

The column-beam connection is a key part in the steel frame,it＇s performance influences the behavior of frame structure directly under loads,especially under dynamical loads.Using rotating spring simulating post-tensioned seismic-resistant connection which is a new type column-beam connection form,using LINK10 simulating steel strands,dynamical time-history analysis of a steel frame was processed with ANSYS,arrived various responses of the structure under earthquake.Through comparing the parameters such as top-displacement,bottom shearing force and storey drift,examined the posttensioned seismic-resistant connection＇s influence on seismic performance of the frame structure from strength and deflection.The result shows that the frame with post-tensioned connections can reduce the internal force,make the structure become more safe and have good seismic-resistant ability.