竹木箱形組合梁力學(xué)性能試驗(yàn)研究*
陳國1，張齊生2，黃東升1，李海濤1，周濤1
- 摘 要
-
(1 南京林業(yè)大學(xué)土木工程學(xué)院， 南京 210037； 2 南京林業(yè)大學(xué)材料科學(xué)與工程學(xué)院， 南京 210037)
［摘要］提出一種以竹集成材為翼緣，OSB板為腹板的竹木箱形組合梁。以組合梁的剪跨比和加勁肋為參數(shù)，對12根梁試件的力學(xué)性能進(jìn)行四點(diǎn)彎曲試驗(yàn)研究。結(jié)果表明，當(dāng)剪跨比小于2.0時，組合梁出現(xiàn)了明顯的剪切破壞特征，隨剪跨比增大，極限承載力呈顯著下降趨勢。加勁肋能顯著提高組合梁的極限承載力，提高幅度為14.7%～18.3%，對極限位移的提高幅度為1.4%～7.5%。加勁肋增強(qiáng)后的組合梁的初始抗彎剛度亦有大幅提高，提高幅度為9.4%～16.9%。研究表明，以O(shè)SB板為腹板的竹木箱形組合梁在工程結(jié)構(gòu)領(lǐng)域具有很好的應(yīng)用前景。［關(guān)鍵詞］OSB板; 竹集成材; 箱形組合梁; 破壞機(jī)理; 抗彎性能中圖分類號：TU366.3 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2015)22-0102-05
Experimental study on mechanical properties of composite OSB-bamboo beam with box sectionChen Guo1, Zhang Qisheng2, Huang Dongsheng1, Li Haitao1, Zhou Tao1（1 College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China; 2 College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China)Abstract: A composite OSBbamboo beam with box section was proposed with glue-laminated bamboo as flange and OSB as web. Four-point bending test study was conducted on mechanical properties of 12 beams using parameters of the shear-span ratios and stiffening ribs of composite beams. The results show that when the shear-span ratio is less than 2.0, the composite beam has obvious shear failure characteristics, and the ultimate capacity decreases obviously with the increase of shear-span ratio. The ultimate capacity of the composite beam can be improved significantly by the stiffening ribs with the amplitude of 14.7%～18.3% and the increasing amplitude for ultimate displacement is 1.4%～7.5%. The initial bending stiffness of the composite beam strengthened with the stiffening ribs is also improved greatly with the amplitude of 9.4%～16.9%. The research shows that the composite OSB-bamboo beam with box section, which adopts OSB as web, has good application prospect in the field of engineering structure.Keywords: Oriented Strand Board (OSB); glue-laminated bamboo; composite beam with box section; failure mechanism; bending behavior
*國家自然科學(xué)基金（51408312），江蘇省自然科學(xué)基金(BK20130982)，中國博士后基金（2013M541679, 2014T70528），江蘇省博士后基金（1301017A），江蘇省高校自然科學(xué)基金（13KJB560008）作者簡介：陳國，博士，講師，Email:chenguo2009@126.com。
- 下載地址
-
