重组竹梁受弯承载力试验研究  

Experimental study on flexural bearing capacity of recombinant bamboo beams

作　　者：周军文[1] 姜慧辉 鲁良辉[1] 齐永胜[1] 张云飞[3] 

机构地区：[1]常州工学院土木建筑工程学院,常州213002 [2]常州市规划局,常州213002 [3]常州市规划设计院,常州213002

出　　处：《建筑结构》2016年第23期42-45,共4页Building Structure

基　　金：建设部科技项目(2014-K2-014);江苏省高校自然科学基金项目(13KJD560001);常州市科技计划项目(CJ20159031)

摘　　要：根据不同的剪跨比,将8根重组竹梁分成两组,对其采用四点弯曲加载,采用位移控制法,以6mm/min加载直至构件破坏,研究重组竹梁的受弯承载力和破坏形态。试验结果表明,重组竹梁的破坏是由于受拉区的纤维被拉断,其极限受弯承载力在17.6~22.1k N·m之间,剪跨比对极限受弯承载力的影响不大,受弯梁跨中截面沿高度方向的应变基本符合平截面假定,达到极限受弯承载力时,其竖向挠度远大于规范规定的要求。在试验基础上,对构件的受弯承载力进行理论分析,其值与试验结果吻合较好。According to the different shear-span ratio,8 recombinant bamboo beams were divided into two groups,and four-point flexural loading method was adopted based on displacement control method with speed of 6mm / min until the structure was failed. The flexural bearing capacity and failure mode of the recombinant bamboo beams were studied.Experimental results show that the recombinant bamboo beams are failed due to destruction of the fiber in tension area,and ultimate flexural bearing capacity is between 17. 6 ~ 22. 1k N·m. The effect of shear-span ratio on ultimate flexural bearing capacity is small. The strain in middle-span cross section of the flexural beam along the height direction is basically consistent with the assumption of plane section. When the beam reaches ultimate flexural bearing capacity,the vertical deflection is far greater than the specification requirements. Based on the experiment,the flexural bearing capacity of the members is analyzed theoretically,and the results are in good agreement with the experimental results.

关 键 词：重组竹 梁 极限受弯承载力 破坏形态 

分 类 号：TU366.1[建筑科学—结构工程]