LQ550高强冷弯薄壁型钢组合墙体受剪性能试验研究-周天华

JournalofBuildingStructures3412201312Vol.34No.12Dec．20130081000-6869201312-0062-07LQ55012311．7100612．7100643．310005OSBLQ5507LQ550、、。8.79%～12.27%、。。TU398.9TU317.1AExperimentalresearchonshearbehaviorofLQ550highstrengthcold-formedsteelcompositewallsZHOUTianhua1LIUXiangbin2YANGLi3WUHanheng11．SchoolofCivilEngineeringChang’anUniversityXi’an710061China2．InfrastructureProjectsOfficeChang’anUniversityXi’an710064China3．DevelopmentofNewWallMaterialsOfficeofZhejiangProvinceHangzhou310005ChinaAbstractInordertostudythemechanicalperformanceshearcapacityandtheseismicperformanceofthehighstrengthcold-formedthin-walledsteelcompositewallwiththeOSBboardandthefibercementboard7highstrengthcold-formedsteelcompositewallsweretestedundermonotonicloadingandlowcyclicloading．Thetestresultsindicatethatthejointofwallsheetingsisaweaklinkinthecompositewallsandthecompositewallwiththewideandcompletesteellinerathorizontaljointhashighshearcapacityandlateralstiffnessthefibercementboardcompositewallshavelowshearcapacityandtheshearcapacityunderthemonotonicloadingconditionsishigherabout8.79%to12.27%thanthatoflowcyclicloadingconditions．Theshearcapacityandshearstiffnessofthetwokindsofsingle-sidedsheetwallisapproximatelyequaltothatofthedoubleboardscompositewalls．Theenergydissipationofallspecimensarealmostequivalentunderlowcyclicloadingconditions．Keywordshighstrengthcold-formedsteelstudwallquasi-statictestshearbehaviorCHD2012TD012。1963—。[e-mail]2012726DOI:10.14006/j.jzjgxb.2013.12.0090OSB、、、、、、、1-6。20047-9、、。10-13LQ550、。。7OSB、LQ550、。11.17LQ550。H×L=3.0m×2.4m。LQ550。2CC75×40×8×0.754.2mm、300mm3C600mm。UU78×43×0.75OSB9mmD8mm12mm。32.4m×1.2m150mm300mm。22。112。1Fig．1Detailsofsteelmember2Fig．2Specimenconstruction1W-SO75-0.75-1aW-SO75-0.75-112400mm×75mm×1.0mmW-SO75-0.75-122400mm×30mm×1.0mm。LQ55020～30μmt=0.75mm。fy=f0.2=629MPaE=2.01×105MPa。2。1.2MTS。500kN361Table1DetailsandloadingmethodofspecimensH×LW-SO75-0.75-1W-SO75-0.75-2W-SO75-0.75-1a3.0m×2.4mOSBW-SF75-0.75-1W-SF75-0.75-23.0m×2.4mW-DO75-0.75-23.0m×2.4mOSB+W-DF75-0.75-13.0m×2.4m+WDS75C75mm0.750.75mm。2Table2Materialpropertiesofwallmembers12mm/kg·m－2≤12//N≥600/≤180/MPa2.09mmOSB//MPa22/7.86//MPa3500/1400/MPa0.348mm/g·cm－31.32/MPa27.2/MPa24.8±250mm。360TDS-602。1M1650mm600mmM12。。3。3Fig．3Testsetup1.2.1-1kN2min4mm85%。7OSB20kN15kN。5Δy。0.5Δy385%。1.2.24。1。D1、D2D3、D4D5、D6D7、D8D9。4Fig．4Arrangementofdisplacementtransducersandstraingauges22.12.1.1OSB7kNOSB。20kN。W-SO75-0.75-246“”。5a～5c。W-SO75-0.75-1OSB22400mm×30mm×1.0mmW-SO75-0.75-1a。2.1.2OSB。。。5d～5e。5Fig．5Typicalfailuremodesofspecimens2.1.3W-DO75-0.75-2OSB+W-DF75-0.75-1+OSB。OSBW-DO75-0.75-2OSBW-DF75-0.75-1。5f～5g。2.2δ0δφ、δl、δ76。δ。δδ=δ0－δl－δφ1δ0=HH－A×D2+D()1/2HA4D1D2D1、D2D1D2δl=D3－D4D3D4D3D4δφ=HδαL+B+C7δα=D6－D8－D5－D7D5、D6、D7、D8D5、D6、D7、D8LB、CD5、D64。Δ=δ=Hδ0H－100+D12－δl－δφ2-P-Δ8a～8f。P-Δ8g～8i。8-。JGJ101—1996《566Fig．6Actualsheardeformationofwalls7Fig．7Ｒotationaldisplacementofwall》14-P-ΔPy、Δy9。μ=Δu/Δy。E14。8-P-ΔFig．8Load-displacementcurves3。P3001/300PsPmaxL。2.3。JGJ227—2011《》151/300。1/300Kw0Kw0=P3001300HP300H/300Kw=Kw0/LKw=P3001300HL3663Table3TestresultsatmainstagesPy/kNΔy/mmPmax/kNΔmax/mmPu/kNΔu/mmP300/kNμ=Δu/ΔyEPs/kN·m－1W-SO75-0.75-115.9426.7019.4541.1016.5349.469.931.85—8.10W-SO75-0.75-1a19.3227.2123.4555.4119.9364.0611.892.35—9.77W-SO75-0.75-216.5515.2919.6835.1816.7356.3014.273.680.598.20W-SF75-0.75-111.2611.3813.5425.20——10.58——5.64W-SF75-0.75-210.3512.2512.0628.1910.2538.949.133.180.585.03W-DO75-0.75-225.4413.3330.1834.7125.6554.3022.784.070.6412.58W-DF75-0.75-121.2515.3325.6536.5221.8044.6717.382.91—10.699Fig．9DeterminationofyieldpointKe=Pe3001300HL43、44。4Table4ShearstiffnessofcompositewallsPy/kNP300/kNK/kN·m－1·rad－1KwKeW-SO75-0.75-115.949.931241—W-SO75-0.75-216.5514.27—1783W-SO75-0.75-1a19.3211.891486—W-SF75-0.75-111.2610.581323—W-SF75-0.75-210.359.13—1141W-DO75-0.75-225.4422.78—2847W-DF75-0.75-121.2517.382172—2.483、41OSBW-SO75-0.75-1W-SO75-0.75-2Py、Pmax7OSBBX-3Py=21.50kNPmax=26.84kN、OSBBX-4A、BX-4B、BX-4CPy20.25、19.50、21.00kNPmax24.50、23.16、23.59kN9.0mmDOSB。OSBC75×40×8×0.757C89×44×12×1.0。W-SO75-0.75-1a2400mm×75mm×1.0mm、Py、PmaxW-SO75-0.75-121.20%、20.56%μ27.02%19.74%。。W-SO75-0.75-2KμW-SO75-0.75-1、W-SO75-0.75-1a。2W-SF75-0.75-1、W-SF75-0.75-2Py、Pmax。PyPmaxW-SF75-0.75-1W-SF75-0.75-28.79%、12.27%。OSBW-SF75-0.75-1Py、PmaxW-SO75-0.75-170.63%、69.79%W-SF75-0.75-2Py、PmaxW-SO75-0.75-262.54%、61.28%7W-SF75-0.75-1Py、Pmax128%、127.7%OSB。W-SF75-0.75-2W-SO75-0.75-2。37Py1=8.78kNPmax1=10.60kN。W-SF75-0.75-1Py2=11.26kNPmax2=13.54kN。W-DF75-0.75-1Py=21.25kNPmax=25.65kN。Py1+Py2=20.04kN≈Py=21.25kNPmax1+Pmax2=24.14kN≈Pmax=25.65kNW-DO75-0.75-213“Py、Pmax”。76KE0.6。31、、。。2。OSB。38.79%～12.27%。4、K。0.6。1SerretteＲOgunfunmiK．Shearresistanceofgypsum-sheathedlight-gaugesteelstudwallsJ．JournalofStructuralEngineeringASCE19961224383-389．2EmadFGAdrianMCColinFD．Lateralbehaviorofplasterboard-cladresidentialsteelframesJ．JournalofStructuralEngineeringASCE1999125132-39．3TianYSWangJLuTJetal．Anexperimentalstudyontheaxialbehaviorofcold-formedsteelwallstudsandpanelsJ．Thin-WalledStructure2004423557-573．4SerretteＲNguyenHH