建筑结构学报2017，Vol.38Issue(9)：110-120,11.DOI:10.14006/j.jzjgxb.2017.09.013
长期荷载作用后钢-竹界面黏结性能分析
Study on bond performance of bamboo-steel interface after long-term loading
摘要
Abstract
In order to investigate the reliability of bamboo-steel interfacial bonding effect after long-term loading,27 specimens,which were divided into pure bonding interface specimens and composite bonding interface specimens,were designed to perform push-out tests after long-term loading.Interfacial forms,applied values of the long-term loads and durations of the long-term loads were set as the basic parameters;the interfacial load carrying capacity,shear stress and the bond slip were investigated.The research shows,structural form of bamboo-steel interface is reasonable which remains intact after long-term loading.Interfaces provide with high load carrying capacities and the composite bonding interface specimens possess significant ductility characteristics.After long-term loading,load carrying capacity attenuation occurs in two groups of pure bonding interface,where the attenuation coefficients are 0.91 and 0.81 respectively.Shear stresses and bond slips are greater at the two endpoints and smaller at middle of the pure bonding interfaces,and the corresponding maximum values of the shear stress are 1.41 MPa and 1.25 MPa,which are decreased by 10％ and 20％ respectively compared with the interfacial shear stress under static loads.Compared with static load experiments,pure bonding interfacial bond slips are increased slightly,and the load carrying capacities,shear stress and bond slips of composite bonding interface remain stable under long-term loading.Self-tapping screws may effectively improve the interracial shear capacity.When screws are set at an equal spacing of 80 mm,the corresponding maximum value of the shear stress is 1.7 MPa.A bonding capacity calculation method of bamboo-steel interface after long-term loading has been proposed.Interfacial capacities can be calculated,and the calculated values match well with experimental values.关键词
钢-竹组合构件/钢-竹界面/长期荷载/推出试验/黏结性能Key words
bamboo-steel composite component/bamboo-steel interface/long-term load/push-out test/bond performance分类
建筑与水利引用本文复制引用
李玉顺,张家亮,刘瑞,张振文..长期荷载作用后钢-竹界面黏结性能分析[J].建筑结构学报,2017,38(9):110-120,11.基金项目
国家自然科学基金项目(51378265,51678310),宁波市自然科学基金项目(2017A610305). （51378265,51678310）
