竹集成材-竹胶板钉节点力学性能

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中图分类号：S781.9 文献标志码：A 文章编号：1673-923X（2025）07-0156-08

Mechanical performance of laminated bamboo lumber - bamboo plywood nailed connections loaded monotonically

CHENGuo12，YING Feifei1， ZHANG Peng1， CHENFengcheng¹，YINMingyang1 （1.Collegeoinsti7a;b MaterialsandStructuralTechnologyofBamboo&WoodEngineringResearchCenter，Nanjing210o37，iangsu，China）

Abstract：【Objective】Inviewofthedeficienciesoftraditional woodtrusses interms ofbearingcapacityand theirpropensity to collapseetirelyhendamaged，anewtypeoflaminatedbamboolumber （LBL）trussisproposed.TheLBLtrussusesBLforboththe chordsandwebmembers，withachmemberconnectedbynailedbambooplywood（BP）Thejoint，asthecriticalpartbetweearious members，playadirectoleintestabilitydoad-beagcapacityofteru.I-deptheseachintothmechanicalproperofBBPnail joints under monotonic loading isofpositivesignfcance forthepromotionandaplicationofLBLtrusses.【Method】Taking the angle θ betweentheloadand the principalaxisoftheBPasaparameter，destructivetests wereconductedon6pureshear，2 sheartension，and12shear-compresionspecimens toexploretheirfailuremechanismsandmechanicalbehaviors.【Result】Theresults indicatedthat tefluremodesoftespecimensicudedBPplatefracturs，nailpeetrationthroughtheBPplate，localio failureof theBPplateunderthenailad，and“double-hinge”failureofthenails.Tefilureofpureshearandshear-tensionjoints primarilymanifestedasBPplatefracturesand“double-hinge”failureofthenails，whiletheshear-compresionspecimensmainly exhibited“double-inge”failureoftenailsInsomespecimens，theailheadswereembeddedintorpenetratedthroughteBPplate. Theultimatebearingcapacityofthepureshearspecimensisidepedentofteangle.Teultimateloadsofthshear-tensiopemens at the same angle were allhigher than those of the shear-compression specimens.For a difference of 90∘ in angle θ ，the bearing capacity ofthespecimensisessentiallthsame.Theload-displacementcurvesdonotshowaclearyieldpoint.Theyieldloadestimatedbythe 5% naildiameteroetmetodisoeinineithtectaliaiondteHassaemoelanettefcteoad-dsplacent constitutiverelationshipofthejointsatvariousstagesofoading.【Conclusion】Thefailure mechanismofthenailedonectionshas benrevealeddrincityutilitydsenesigeddspactsiioe proposed.These findings provide design basis and reference for the application of bamboo trusses.

Keywords：bmbo;lamatedbooumbersilotionodaringapacityoad-dspacemetosiieel

竹子生长速度快，成熟周期仅需 3～6a ，是一种极具潜力的可再生资源[1。（剩余14495字）