钢-竹组合结构梁柱耗能节点抗震性能试验研究  

Experimental study on seismic performance of beam-column energy dissipation joints of steel-bamboo composite structures

作　　者：张家亮[1] 童科挺 何佳伟 单奇峰 李玉顺 ZHANG Jialiang;TONG Keting;HE Jiawei;SHAN Qifeng;LI Yushun(College of Science and Technology,Ningbo University,Ningbo 315300,China;School of Civil and Environmental Engineering,Ningbo University,Ningbo 315211,China;College of Civil Engineering and Architecture,Qingdao Agricultural University,Qingdao 266109,China)

机构地区：[1]宁波大学科学技术学院,浙江宁波315300 [2]宁波大学土木与环境工程学院,浙江宁波315211 [3]青岛农业大学建筑工程学院,山东青岛266109

出　　处：《建筑结构学报》2022年第12期255-266,共12页Journal of Building Structures

基　　金：国家自然科学基金项目(51978345,51678310);宁波市自然科学基金(2021J136)。

摘　　要：为进一步提高钢-竹组合结构抗震性能,提出自变形耗能节点、翼缘摩擦型耗能节点、转动摩擦型耗能节点与后张预应力耗能节点的构造方法,设计制作了9个节点试件,并对其实施低周反复加载试验,观测节点变形形态与破坏特征,得到节点梁端位移-荷载滞回曲线与骨架曲线,并探讨骨架曲线特征点计算方法,分析各类型耗能节点的承载力、刚度、延性、耗能水平与转动性能,并与设置带肋T形连接件的节点进行对比。结果表明:各类型耗能节点构造合理,具有较高的承载力、安全储备与良好的滞回耗能水平;CSIRO法与CEN法可较好地预测自变形耗能节点、翼缘摩擦型耗能节点与后张预应力耗能节点的屈服荷载,几何法、等能量法与最远点法适用于转动摩擦型耗能节点屈服荷载的测算;各耗能节点均为中高延性节点,具有与带肋T形连接件节点相当的初始转动刚度与大于0.03 rad的塑性转角;与带肋T形连接件节点相比,耗能节点位移延性系数提升了13.05%~63.48%,转动摩擦型耗能节点与后张预应力耗能节点的屈服转角与塑性转角提高了27.23%~86.85%。To further improve the seismic performance of steel-bamboo composite structures, construction methods of self-deformation joints, flange friction joints, rotational friction joints and post-tensioned prestressed joints were proposed and 9 specimens were designed and manufactured. The low-cyclic reversed loading tests were performed on the specimens to observe deformation morphology and failure characteristics, to obtain hysteresis loops and skeleton curves and to discuss the calculation method of characteristic points of skeleton curves. The bearing capacity, stiffness, ductility, energy dissipation level and rotational performance of the energy dissipation joints were analyzed and compared with those of the joint with stiffened T-connectors. The results show that the four kinds of energy dissipation joints are reasonably structured with high bearing capacities, fine safety reserves and good hysteretic energy dissipation levels. The CSIRO method and CEN method can better predict the yield load of the self-deformation joint, flange friction joint and post-tensioned prestressed joint, while the geometric graphic method, equivalent elasto-plastic energy method and farthest point method are suitable for the calculation of yield load of the rotational friction joint. All energy dissipation joints are of medium and high ductility, with an initial rotational stiffness comparable to the joint with stiffened T-connectors and a plastic angle larger than 0.03 rad. Compared with the joint with stiffened T-connectors, the ductility coefficients of the energy dissipation joints are increased by 13.05% to 63.48%, and the yield angle and plastic angle of the rotational friction joint and the post-tensioned prestressed joint are increased by 27.23% to 86.85%.

关 键 词：钢-竹组合结构 耗能节点 拟静力试验 滞回耗能 转动性能 

分 类 号：TU398.903[建筑科学—结构工程]