###
工程科学与技术:2023,55(1):222-231
←前一篇   |   后一篇→
本文二维码信息
码上扫一扫!
正交胶合木环型耗能节点设计与抗剪试验研究
(北京工业大学 城市建设学部,北京 100124)
Design and Shear Experimental Study of the Annular Dissipative Connector for Cross-laminated Timber Structure
(Faculty of Architecture, Civil And Transportation Eng., Beijing Univ. of Technol., Beijing 100124, China)
摘要
图/表
参考文献
相似文献
本文已被:浏览 71次   下载 39
投稿时间:2022-03-13    修订日期:2022-06-02
中文摘要: 连接节点对正交胶合木墙体抗侧力机制的发挥、延性及耗能起着至关重要的作用。本文提出一种由U型阻尼器拼装而成的环形节点,连接正交胶合木墙体与基础钢梁,使墙体的损伤集中于耗能元件,实现地震作用下耗散能量,保护正交胶合木墙体,同时,实现承载力可预测且损坏后可更换。通过低周往复抗剪试验,研究了7个不同形状及厚度的环形耗能节点的受剪性能,并对其滞回曲线、破坏特征、承载力、刚度退化及耗能能力等进行研究,对比不同收腰程度与钢板厚度对抗剪性能的影响;结合Eurocode 5等标准理论,计算正交胶合木锚固端钢板螺钉连接的抗剪承载力,推导环形耗能节点的主要力学性能指标计算公式;并基于有限元Abaqus软件,开展耗能节点往复受剪数值模拟。结果表明:以试验研究为基础,提出的正交胶合木锚固端抗剪承载力计算公式、环形Q235阻尼器力学指标计算公式及开展的有限元分析,为正交胶合木耗能节点设计提供依据;除厚度为8 mm、收腰宽度为86 mm的试件以外,其余节点试件实现了对木材的损伤集中到耗能元件上;所建立的环形阻尼器的力学性能指标计算公式,可以较为准确地预测节点的屈服力、初始刚度与屈服位移;有限元模型可以较好地模拟耗能节点的抗剪行为;通过分析给出了厚度为8 mm、收腰宽度为55 mm的试件为抗剪方向承载力及耗能能力两方面最佳的耗能连接。研究成果为正交胶合木结构在抗震区工程中的应用提供技术支撑。
Abstract:The connections of cross-laminated timber (CLT) walls make up most of the lateral resisting mechanism and play a crucial role in the ductility and energy dissipation of the CLT wall system. An annular dissipative connector formed by U-shaped dampers was proposed to connect the CLT wall and the steel beam foundation. The aim was to shift the damage of the wall to the energy-consuming components to dissipate the seismic energy and protect the CLT wall. And the bearing load can be predicted easier, and the connections can be replaced after damage. Static shear cyclic tests were performed on seven annular dissipative connectors to investigate the main shear performance such as hysteretic curves, failure mechanisms, bearing capacities, stiffness degradation, and energy dissipation were studied. The effects of different widths and thicknesses of steel plates on the shear properties of the connections were compared. The shear bearing capacity of the anchored steel-CLT end with screws was theoretically estimated mainly based on Eurocode 5, and the calculation formula of the main mechanical parameters of the annular dissipative connectors was proposed. And the numerical simulation of energy-consuming nodes’ shear performance was carried out based on the finite element Abaqus software. The results showed that based on the experimental research, the proposed calculation formula for shear resistance of the CLT anchorage end, the calculation formula for the mechanical index of the annular Q235 damper, and the finite element analysis carried out could provide a basis for the design of dissipative connectors of CLT wall. Except for specimen D8-S86, the connections shifted the damage of wood to the energy-dissipating components. The calculation formula of the main mechanical performance index of the annular damper could accurately predict the yield force, initial stiffness, and yield displacement of the dissipative connectors. The established finite element model could predict the shear behavior of the dissipative connectors. An excellent dissipative connector (specimen D8-S55) for shear direction in load capacity and energy-dissipating capacity was presented after a series of analyses. The study can provide technical support for the engineering application of CLT structures in seismic areas.
文章编号:202200203     中图分类号:TU398+.6    文献标志码:
基金项目:国家自然科学基金项目(52008011);北京市教育委员会项目(KM201910005019);博士后科学基金项目(2019M660501)
作者简介:第一作者:薛素铎(1959-),男,教授,博士.研究方向:大跨空间结构、结构抗震与减震.E-mail:sdxue@bjut.edu.cn;通信作者:沈银澜,E-mail:shenyinlan@bjut.edu.cn
引用文本:
薛素铎,赵艳阳,沈银澜,武旺琪,郭汉桢.正交胶合木环型耗能节点设计与抗剪试验研究[J].工程科学与技术,2023,55(1):222-231.
XUE Suduo,ZHAO Yanyang,SHEN Yinlan,WU Wangqi,GUO Hanzhen.Design and Shear Experimental Study of the Annular Dissipative Connector for Cross-laminated Timber Structure[J].Advanced Engineering Sciences,2023,55(1):222-231.