摘要
为研究低周往复荷载作用下设置箱形柱的重组竹框架结构滞回特性与破坏机理,对采用3类不同钢夹板螺栓连接节点的一榀重组竹框架结构施加水平低周往复荷载,从破坏模式、滞回曲线、延性、刚度退化和耗能能力等方面进行对比分析。试验研究表明:通过钢夹板螺栓连接并设置箱形柱的重组竹框架滞回曲线较为饱满,具备较强的抗倒塌能力;重组竹作为一种生物基纤维胶合材料,由胶合面脆性脱黏引发的贯穿裂缝成为主要破坏模式。基于试验数据建立了考虑胶合面损伤的四折线骨架曲线模型,并考虑承载能力突降建立了恢复力模型,该模型可以较准确反映该类重组竹框架的滞回特性。
In order to study the hysteresis characteristics and failure mechanism of bamboo scrimber frame structures with box columns under low-cycle reversedloading,a horizontal low-cycle reversed loading was applied to bamboo scrimber frame specimens using three types of bolted steel-bamboo scrimber-steel(SBSS)connections.The damage mods,hystricursductilitystiffes egdation n-consuming capacity of the specimens were analyzed and compared.Experimental research shows that the bamboo scrimber frame structure with bolted SBSS connections and box columns exhibits a fuller hysteresis curve and strong collapse resistance.However,as a kind of bio-based fiber gluing material,the primary failure mode is characterized by through-thickness cracks induced by the brittle debonding at the adhesive interfaces.Based on the experimental data,a four-linear skeleton curve model incorporating adhesive interface damage was developed,and a restoring force model was established taking into account the sudden drop in bearing capacity,which can accurately reflect the hysteresis characteristics of box column-bamboo scrimber frame structures with box columns.
作者
邓晓萌
张明
马怀纲
赵仕兴
余志祥
DENG Xiaomeng;ZHANG Ming;MA Huaigang;ZHAO Shixing;YU Zhixiang(School of Civil Engineering,Southwest JiaotongUniversity,Chengdu 610031,China;Sichuan Provincial Architectural Design and Research Institute Co.,Ltd,Chengdu 610095,China)
出处
《建筑结构学报》
北大核心
2025年第11期55-66,共12页
Journal of Building Structures
基金
国家自然科学基金面上项目(52578250)。
关键词
重组竹框架
钢夹板螺栓连接
箱形柱
拟静力试验
滞回特性
破坏机理
恢复力模型
bamboos crimber frame
bolted steel-bamboo scrimber-steel connection
box column
quasi-static test
hysteretic characteristic
failure mechanism
restoring force model
