组合式消能减震墩柱试验与设计方法研究  

Analytical and experimental study on the composite energy dissipation pier

作　　者：刘晓刚[1,2] 李连友 聂鑫[1] 樊健生[1] 

机构地区：[1]清华大学,北京100084 [2]中冶建筑研究总院有限公司,北京100088 [3]中国路桥工程有限责任公司,北京100011

出　　处：《土木工程学报》2017年第2期73-81,共9页China Civil Engineering Journal

基　　金：国家自然科学基金(51222810)

摘　　要：对采用Q345GJ钢的可更换剪切型消能连梁展开循环加载试验研究。结果表明这种连梁具有稳定的滞回耗能特性和较好的变形能力,同级荷载下多次滞回加载基本不产生循环强化;极限超强系数大致在1.35~1.5之间,符合预期设计要求。基于这种消能连梁,提出并设计一种由消能件和钢管混凝土组成的组合式消能减震墩柱,并对其开展了试验研究。试验结果表明,本文所采用的设计方法可以保证墩柱实现预期的破坏模式,即连梁剪切变形与柱脚集中塑性铰;墩柱具有很强的耗能能力、延性和变形能力;柱脚屈服时墩顶位移角约为1/80,可以保证中等地震荷载作用下柱脚处于弹性状态。Experimental research is conducted on the replaceable energy-dissipation shear links fabricated with Q345GJ steel. The analysis results show that the shear links have stable hysteretic energy dissipation and good deformation capacity with rare cyclic hardening under multiple hysteretic loading at the same level. The ultimate plastic overstrengh coefficient is between 1.35 and 1.5, which satisfies the expected design requirements. One kind of new composite energy dissipation pier was developed using the shear links, and experiments were conducted on the pier specimens. The results indicate that by the used design method, the expected failure modes can be met, including the shear deformation in links and the plastic hinge at column feet. The proposed piers have good energy dissipation, ductility and deformation capacity. The drift ratio at the pier top is about 1/80 when the plastic hinge occurs at the column feet, indicating that the column feet can remain elastic under moderate seismic loads.

关 键 词：钢连梁 消能减震 组合结构 桥梁墩柱 

分 类 号：U443.22[建筑科学—桥梁与隧道工程] TU398[交通运输工程—道路与铁道工程]