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1、441820149Building StructureVol 44 No 18Sep 2014*1 21 23221200092 2200092 3100044Q235B BLY225TJ。、。Bouc-Wen。TU352.1A1002-848X 2014 18-0071-08Experimental study on the aseismic performance of buckling-restrained bracesLi Guoqiang1 2Sun Feifei1 2Deng Zhongliang3Guo Xiaokang2Jin Huajian21 State Key Labor
2、atory for Disaster eduction in Civil EngineeringTongji UniversityShanghai 200092China2 Building DepartmentCollege of Civil EngineeringTongji UniversityShanghai 200092China3 China Architectural Design esearch GroupBeijing 100044ChinaAbstract Based on diverse design principlesthree different sections
3、of TJ type buckling-restrained braces TJ-BBweredesigned with domestic hot-rolled Q235B and BLY225 steel materialsThrough low-cyclic loading experimentstheinfluences of respective hysteresis curvesskeleton curvesthe cumulating plastic strainadditional equivalent dampingratio and relative length of th
4、e brace core on its anti-seismic property were studied The experimental analysis showes thatTJ-BB has steady mechanical propertyexcellent ductility and low-cyclic fatigue property with considerable full hysteresiscurves Furthermoreaccording to hysteresis curves of experiment membermodified hysteresi
5、s model based on Bouc-Wenmodel was proposedwhich matched well with the experimental resultsKeywords buckling-restrained bracelow-cyclic loadingyielding loadcumulating plastic strainrelative length of theplastic coreasymmetrical property of tension and compression*2012BAJ13B02。Emailgqli tongji edu cn
6、。0BB。1BB23、4BB。BB、BB、。5BBCameron JBlack6Bouc-WenBBBB。TJTJ-BB7-910。TJ-BB7 11。11.1 TJTJ、12。71。20141Ae/mm2/mm/mm/mmfy/MPafu/MPa/%1TJ-235B-B140-38106 590.00301163 8100.843260425380.612TJ-235B-B135-27706 215.00301102 7700.798250430310.583TJ-225-D50-14503 327.5630981 4500.575240365520.664TJ-225-B180-37009
7、 280.00301603 7000.754250350480.675TJ-225-B160-31007 419.38301763 1000.471246360480.656TJ-235B-B120-2000H7 923.60tf=18 tw=18702 0000.676256432350.607TJ-235B-B130-3500H5 951.24tf=11 tw=71453 5000.657255425330.618TJ-225-B650-8000-129545.00552968 0000.778220314480.709TJ-160-B120-32738 642.86401883 2730
8、.65816628589.50.3310TJ-225-B120-30516 341.46262063 0510.607235360480.651BBTJ/TJ-BBBD+BD。2tftw。1TJ-BB2Q235BBLY225BLY225 HBBQ235B。、Q345B0.471 0.843Ae1 200 1 600kN500kN。/7=1。130%。879810111。1.21 710 000kN300t、1 000t3。4。3 cA B。8 101 77 8 11。3TJ-BB12、34。42744184。12、。5。51.3。GB50011201012TJ136。1/500 1/300 1
9、/200 1/1501/100 1/801/1501/80。1/801/5012。62。12151/60387131/80304 51/8079 486H4 5367H1/150729。7 11BB。8 107 8 11。2/mm/min1452451/80 1/60+1/80 15+1/60 38713601/801/80304451/80+1/80795451/80+1/80486451/80+1/80367401/1501/15029845940104031.11.04。20014。3/kN/mm/kN/kN/kN/mmy1356.312620.34 2408.6426261.106.2
10、7257.002462.203022.20 2389.0026011.094.76894.553472.741075.36889.009471.072.031225.594516.673863.20 2902.0030841.064.982444.525493.033955.60 2802.0029711.063.082099.926816.132654.20 2170.5022611.043.04980.647350.273169.40 2046.0022061.083.76522.738975.9812763.00 9154.0099331.019.21405.009836.001990.
11、00 2563.0028131.101.45842.0010650.002680.00 1854.0019941.082.00483.0037201422.11 107 16。TJ-BB、。TJ-BB。BBBB。17 aOABBBi7193115137159882104126148716101147441818eq19eq20eqi=Fui Fyui y1ke=Fui Fyui yLEAe1=1NNi=1i=1NNi=1Fui Fyui yLEAe2keBBFyyBBFuiuiBBLEAeN。1 717 b24。41 60.0471/150。171 7412345670.0560.0630.0
12、290.0160.0510.0262.2eq12eq=ED4Es3EDEs。5TJ-BBeq18。eq。H61/80H。TJ-BB51/5001/3001/2001/1501/1001/8010.073 5 0.219 4 0.317 3 0.341 9 0.398 6 0.427 320.115 8 0.220 2 0.277 4 0.341 9 0.398 6 0.423 030.475 740.234 7 0.316 0 0.379 8 0.439 9 0.443 9 0.500 950.228 2 0.327 8 0.375 4 0.416 5 0.461 7 0.483 160.24
13、8 9 0.355 8 0.396 1 0.404 6 0.419 0 0.378 170.554 02.3BLY225Q235B3TJ-BB。19eq。2.412 4 5 6 7。220eq。200 6 0.7572014212223eq。2.521 22236。233y。6ypp/ypp/y10.001 500.386257.2120.001 320.439332.251.5321 159.4630.001 432.2801 597.1040.001 280.557434.794.2843 344.0550.000 840.679809.582.8423 388.5460.001 300.
14、549422.311.6451 265.3870.001 281.093853.9180.001 260.514407.5390.000 440.8521 923.17100.000 660.8661 321.08200。TJ-BB。TJ-BB。2.6TJ-BB。=CmaxTmax4CmaxTmax。24TJ-BB。7。247 11TJ-BB、Bauschinger 11.1。674418minmax71234567min0.9991.0041.0550.9920.9910.9341.073max1.0871.0901.0551.0471.0671.0401.0733TJ-BB3.1 Bouc
15、-WenBouc-WenBouc15n=1Wen16F x t=kx t+1 xykz t5 z=A x xzn1z xznxy6F x tx tk0 1z txyz A A Az 0nn1nBouc-Wen。Bouc-Wen25。6nn 1ndzdx=A +znxy x0 z0A znxy x0 z 0A+znxy x 0 z0A+znxy x 0 z 077z、zmax=A+()1nzmin=A+()1n87dzdx26。25Bou-Wen26z-x3.2 BB17BB-1 BB2BB3 BBBauschinger、4 BB、。Cameron J Black6Bouc-Wen。Bouc-W
16、enTJ-BB。3.36 15-17Bouc-WenA=1 =0.7 =0.3 n=1。Bouc-WenTJ-BBBouc-Wen。1DDD=Nii=1pNi/y 19k*bk*b=kb/D102=Dn/n+121137z*=2z+1+1124pNiimm。TJ-BBBouc-Wen z=A x xz*n1z*+xz*nDxy13n=1 z=A x xz*+xz*Dxy14271 2 4 5Bouc-Wen77201427Bouc-Wen。TJ-BBBouc-WenBou-WenTJ-BB。27Bouc-WenBouc-Wen。Bouc-WenA D。41 TJ-BB。TJ-BBTJ-BB。2
17、TJ-BB。TJ-BB。0 6 0.7。3 TJ-BB200。BBBB。4 TJ-BB1.1。5Bouc-WenTJ-BB。1 J 2005 7 11-122J 200535 818-233J 2011 44 460-704J 201144737-455J 2010 40 101-66CAMEON J BLACKNICOS MAKISIAN D AIKENComponent testing seismic evaluation and characterizationof buckling-restrained bracesJ Journal of StructuralEngineering2
18、004130 6880-8947TJ-J 200911 422-268J 2007 29 223-329J 201031 5117-12310-J 2012 14544-5211 TJ-C/200712GB 500112010S 201013 TJM 200914ANSI/AISC 341-05 Seismic provisions for structural steelbuildings S AISC199715BOUC Forced vibration of mechanical systems withhysteresisC/The 4th International Conference onNonlinear Oscillation Prague 1967 315-32016WEN Y KMethod of random vibration of hystereticsystemsJ Journal of Engineering mechanics 1976102249-6317J 200727226-3187