(1 西安建筑科技大学土木工程学院，西安 710055； 2 西安理工大学水利水电学院，西安 710048；3 中联西北工程设计研究院，西安 710082)
［摘要］提出一种新型剪切型耗能梁段与柱连接节点——改进加盖板方案，在满足梁端抗弯、抗剪承载力的同时，放松对耗能梁段的约束，使其充分发展剪切塑性变形，耗散更多的地震能量。采用1∶3缩尺模型，将该新型方案用于D型偏心支撑结构中，与传统的D型偏心支撑结构进行了对比试验，结果表明，采用改进加盖板方案的单斜杆偏心支撑结构具有很好的抗侧移刚度和变形能力，并具有足够的抗侧移能力；可以将耗能梁段从柱边移开，从而允许耗能梁段有较大转动，耗散更多的地震能量。同时也给出了改进加盖板方案的设计方法。
［关键词］D型偏心支撑； 耗能梁段； 盖板
Experimental study on seismic behavior of adding cover-plate protocol for D-type eccentrically braced steel frames
Pan Xiuzhen1,2, Hao Jiping1, Wang Defa2, Gao Jie3(1 School of Civil Engineering, Xian University of Architecture & Technology, Xi’an 710055,China；2 Institute of Water Resources and Hydraulic Power, Xi’an University of Technology, Xi’an 710048,China；3 China United Northwest Institute for Engineering Design & Research, Xi’an 710082,China)
Abstract:A new connection protocol, adding cover-plate between shear links and column,is suggested. It was used to enhance moment and shear carrying capacity of beam,to relax the restriction and assure the sufficiency development of plastic deformation of the link, and dissipate more earthquake energy. Considering the scale ratio of 1:3, the experimental data of new protocol and conventional connection were achieved by two specimens under cyclic loading. Results indicate that the new type of eccentrically braced steel frame have enough stiffness and deformation capacity, draw link beam away from flange of column, and dissipate more earthquake energy. Meanwhile, some design and amended measures were recommended for the new type protocol.
Keywords:D-type eccentrically braced； link beams； cover-plate
*陕西省教育厅专项科研计划项目(06JK255)；西安建筑科技大学重大科技项目创新资金项目(ZX0510)。
作者简介：潘秀珍，博士，工程师，Email:panxiuzheng@163.com。
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