预应力胶合木梁受压区层板胶合木受压性能试验-论文.pdf

《预应力胶合木梁受压区层板胶合木受压性能试验-论文.pdf》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、第42卷第6期东北林业大学学报Vo1．42No．62014年6月JOURNALOFNORTHEASTFORESTRYUNIVERSITYJun．2014预应力胶合木梁受压区层板胶合木受压性能试验)左宏亮王东岳何东坡王永兵(东北林业大学，哈尔滨，15oo4o)(苏州皇家整体住宅系统股份有限公司)摘要为了选择适用于新型预应力胶合木梁受压区的层板胶合木选取SPF(云杉一松一冷杉)、杨木、东北落叶松和桉木等木制材料，研究树种类别、树种组合、层板厚度和组坯方式等因素对层板胶合木受压性能的影响。采用自行提出的棱柱体胶合木试块．利用自行研制的对夹

2、式引伸计．通过4批次17组102个层板胶合木试块的顺纹受压试验，研究了层板胶合木的弹性模量、顺纹抗压强度、受力特征及破坏形态。结果表明：杨木、东北落叶松和桉木的弹性模量及顺纹抗压强度均高于进口木材SPF尤其是杨木和东北落叶松的受压性能明显好于其他木材；不同树种组合与单一树种试块的弹性模量及顺纹抗压强度数值接近不同树种组合具有一定的可能性：虽然随着层板厚度的减小，试块的弹性模量及顺纹抗压强度都有一定的上升趋势，但层板厚度和组坯方式对受压性能的影响不大。关键词预应力胶合木梁；层板胶合木；弹性模量：顺纹抗压强度；破坏形态分类号TU366．

3、3PerformancesofGlued-laminatedTimberintheCompressiveZoneofPrestressedGlulamBeams／ZuoHongliang，WangDongyue，HeDongpo(NortheastForestryUniversity，Harbin150040，P．R．China)；WangYongbing(SuzhouCrownhomesCO．。rD)／／JournalofNortheastForestryUniversity．一2014，42(6)．一90～94．107Inord

4、ertochoosethelayerboardglulamforapplyingtothecompressionzoneofthenewtypeprestressedglulambeams，westudiedthetreespecies，treecombination．thethicknessesoflaminates，andassemblepatterntoshowtheefectonthecompressionperformanceoflayerboardglulambychoosingtheSPF，Poplar，North．E

5、astLarix，andEucalyp—tus．BasedO1'1thecompressiontestsalongthegrain0nthe4batcheswith17groupsprismglulamspecimens，atotalof102byusinganewtypeofholdertypedisplacementsensor．westudiedtheelasticmodulus，compressionstrengthparalleltograin，mechanicscharacteristicandfailuremodeof

6、thelayerboardglulam．TheelasticmodulusandthecompressionstrengthparalleltograinofPoplar，North．EastLarixandEucalyptusarebothhigherthanthoseofSPF．especiallytheeom—pressionperformanceofPoplarandNorth．EastLarixismuchbetterthanthatofothers．Theelastiemodulusandtheeom．pressions

7、trengthparalleltograinfromdifferenttreespeciescombinationaresimilarwiththefeasibilityofdifferentspecies．Thoughtheelasticmodulusandthecompressionstrengthparalleltograinhaveacertainincreasingtrendwiththedecrea—singthicknessesoflaminates．thethicknessesoflaminatesandassemb

8、lepatternhavelittleeffect013compressivebehavior．KeywordsPrestressedglulambeams：Glued．1aminatedtimber：Elasticmodulus；P