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A NOVEL TECHNIQUE FOR ENERGY DISSIPATION OF BEAM-COLUMN JOINT AND ITS NUMERICAL ANALYSIS
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摘要: 铅具有良好的塑性变形能力,变形后能重新结晶恢复、无应变硬化。基于该特征,提出了一种杆式铅剪切阻尼器,这种阻尼器用于框架节点梁端塑性铰的耗能减震。采用有限元分析了阻尼器在不同初始屈服力、梁不同极限弯矩下的耗能性能。通过对梁滞回曲线的分析表明,所提出的耗能减震器工作性能稳定、耗能效率高、减震效果好、构造简单。Abstract: Lead has a good deformability.Based on the properties of this deformability and recovering without strain-hardening,a rod-like lead shear damper,which is installed at the end(plastic hinge)of a beam for a framed joint,is presented, and it is primarily used in the dissipation of earthquake energy.Based on the finite element method(FEM) analytical results,it is found that this type of damper can effectively increase the damping ratio of a beam during a earthquake,and the performance is stable.
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[2] 王艳武,王铁英,王焕定,等.两类铅阻尼器试验研究.地震工程与工程震动,2004,24(1):166-171 M D Monti and W H Robinson.A Lead Shear Damper Suitable for Reducing the Motion Induced by Wind and Eanhquake.11 WCEE.Acapulco,Mexico 1996:23-28 [3] 李冀龙,欧进萍.铅剪切阻尼器的阻尼力模型与设计.工程力学,2006,23(4);67-73 [4] 王铁英,王艳武.王焕定,等.钢铅组合耗能器力学性能试验研究.工程力学,2005,22(2):149-154 [5] Robinson W H,Cousins W J.Lead dampers for base isolation.Proceeding of the 9thWorld Conference on Earthquake Engineering,1988:427-432 [6] 过镇海.钢筋混凝土原理.北京:清华大学出版社,1999:211-213 [7] 周福林.工程结构隔震减震研究进展.北京:地震出版社,2004:223-230 -
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