CAJ | 학술논문

提出了一种以 OSB 为腹板骨架,OSB 板外用环氧树脂胶黏剂和钉子连接竹集成材而成的胶合竹木工字梁.以竹木工字梁的腹板高度、剪跨比及加劲肋为参数,对24根竹木工字梁的结构性能进行研究.分析了工字梁试验全程的破坏形态和破坏机理,探讨了其极限承载力、延性和抗弯刚度等,并研究影响其结构性能的因素.研究结果表明,竹木工字梁整体工作性能优良,跨中截面应变沿梁高方向仍基本符合平截面假定,其极限承载力与截面高度、剪跨比和加劲肋有关.当剪跨比小于2.0时,组合梁出现了明显的剪压破坏特征,剪跨比越大,极限承载力呈显著下降趋势.加劲肋能显著提高工字梁的极限承载力,提高幅度为3.4%~38.0%,对极限位移的提高幅度约为1.7%~12.6%.加劲肋增强后的工字梁的初始抗弯刚度亦有大幅提高,提高幅度为10%~30%,腹板越高,增幅越大.
제출료일충이 OSB 위복판골가,OSB 판외용배양수지효점제화정자련접죽집성재이성적효합죽목공자량.이죽목공자량적복판고도、전과비급가경륵위삼수,대24근죽목공자량적결구성능진행연구.분석료공자량시험전정적파배형태화파배궤리,탐토료기겁한승재력、연성화항만강도등,병연구영향기결구성능적인소.연구결과표명,죽목공자량정체공작성능우량,과중절면응변연량고방향잉기본부합평절면가정,기겁한승재력여절면고도、전과비화가경륵유관.당전과비소우2.0시,조합량출현료명현적전압파배특정,전과비월대,겁한승재력정현저하강추세.가경륵능현저제고공자량적겁한승재력,제고폭도위3.4%~38.0%,대겁한위이적제고폭도약위1.7%~12.6%.가경륵증강후적공자량적초시항만강도역유대폭제고,제고폭도위10%~30%,복판월고,증폭월대.
A OSB webbed bamboo I-shaped joist connected and fixed by epoxy resin adhesive and nails was presented.The web height,shear span ratio and web stiffener were included as control parameters to see their effect on the flexural performance of 24 OSB webbed bamboo joists.The failure process,failure mechanism,deformation and carrying capacity were investigated and the shear capacities were also dis-cussed.The results show that the composite joists show excellent combination performance,higher stiff-ness and strength.Also,the shear capacity of this joist has a close relationship with the shear span ratio and web height.When the shear span ration is less than or equal to 2.0,the failure modes were character-ized by shear compression failure of the OSB web panels.The web stiffeners can markedly improve the ul-timate load of the joists by 3.4%~38.0%,and is helpful to ultimate displacement and initial flexural stiff-ness by 1.7%~12.6% and 10%~30%,respectively.The web is higher and the growth is greater.