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（1 常州工學(xué)院土木建筑工程學(xué)院， 常州 213002； 2 常州市規(guī)劃局， 常州 213002； 3 常州市規(guī)劃設(shè)計(jì)院， 常州 213002）

［摘要］根據(jù)不同的剪跨比，將8根重組竹梁分成兩組，對(duì)其采用四點(diǎn)彎曲加載，采用位移控制法，以6mm/min加載直至構(gòu)件破壞，研究重組竹梁的受彎承載力和破壞形態(tài)。試驗(yàn)結(jié)果表明，重組竹梁的破壞是由于受拉區(qū)的纖維被拉斷，其極限受彎承載力在17-6～22-1kN·m之間，剪跨比對(duì)極限受彎承載力的影響不大，受彎梁跨中截面沿高度方向的應(yīng)變基本符合平截面假定，達(dá)到極限受彎承載力時(shí)，其豎向撓度遠(yuǎn)大于規(guī)范規(guī)定的要求。在試驗(yàn)基礎(chǔ)上，對(duì)構(gòu)件的受彎承載力進(jìn)行理論分析，其值與試驗(yàn)結(jié)果吻合較好。

［關(guān)鍵詞］重組竹； 梁； 極限受彎承載力； 破壞形態(tài)

中圖分類號(hào)：TU366-1文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2016)23-0042-04

Experimental study on flexural bearing capacity of recombinant bamboo beams

Zhou Junwen1， Jiang Huihui2, Lu Lianghui1, Qi Yongsheng1, Zhang Yunfei3

(1 School of Civil and Architecture Engineering， Changzhou Institute of Technology， Changzhou 213002， China； 2 Planning Bureau of Changzhou，  Changzhou 213002， China； 3 Changzhou City Planning and Design Institute，  Changzhou 213002， China)

Abstract: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 17-6～22-1kN·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.

Keywords:recombinant bamboo; beam; ultimate flexural bearing capacity; failure mode

*建設(shè)部科技項(xiàng)目(2014-K2-014)，江蘇省高校自然科學(xué)基金項(xiàng)目(13KJD560001)，常州市科技計(jì)劃項(xiàng)目（CJ20159031）。

作者簡(jiǎn)介：周軍文，博士研究生，副教授，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email: junwenzhou@126.com。