吊车梁设计计算书

吊车梁设计（1）设计资料厂房跨度为18m，长度为84m，柱距6m。吊车梁跨度6m,每跨各设一台5t电动单梁吊车。吊车采用采用北京起重运输机研究所LED型5t软钩中级工作制(A5)电动单梁吊车中级工作制。最大轮压max38PKN，最小轮压min6.15PKN，吊车总宽B=3000mm，吊车轮距W=2500mm，轨道高度134mm，材料选用Q235B。图1吊车有关尺寸（2）内力计算1）求maxMmaxM时最不利轮位如图2所示。图2maxM时最不利轮位布置max1maxQFP=1..05×1.03×1.4×38=57.54KN57.54237545.55600045.552.375108.18.57.5445.5511.99BCCCRKNMKNmVVKN左右2)求maxTM101max5000.120.121.52221.41.52.12.1108.183.9557.54QTGgTKNnTTKNM3）求maxVmaxV时最不利轮位如图3所示。图3maxV时最不利轮位布置max57.543.5691.116VKN4)求maxTVmax2.191.113.3357.54TVKN(3)截面估算1）梁高①按经济条件确定：63331.2108.181060379521573007603795300292shshWmmhWmm②按允许挠度值确定：66min0.6100.6215600050010387lhfhmmv③建筑净空无要求故取h=500mm。2）腹板厚度①经验公式：73730.58.5mmwth②按抗剪要求：3maxmin1.21.291.11101.75.500125wVtmmhf③按局部挤压要求：52505102134368zyRlahhmm3min1.057.54100.73.368215wzFtmmlf故取8wtmm④局部要求50023562.580808yf3）翼缘尺寸为使截面经济合理，选用上、下翼缘不对称工字形截面，所要翼缘板面积按下列公式近似计算。16037951.850054165006取上翼缘A=250×10=25002mm下翼缘A=200×10=20002mm即初选上翼缘板-250×10，下翼缘板-200×10翼缘外伸宽度235235151510150100235yatmmmmf（4）验算1）截面特性：212250102001048088340250105480825020010495235.38340500235.3264.7Ammymmymm322284808480250235.325010235.3520010264.7512xI=3420411914mm3113420411911453639235.3xxIWmmy3223420411911292184264.7xxIWmmy3341025010200196875001212yImm31119687500196875100yyIWmmx32219687500157500125yyIWmmx1968750048.598340yyIimmA6000123.515048.59y吊车梁上翼缘：2250102500Amm上34102501302083312yImm上313020833104167125yWmm上2）强度验算：①正应力上翼缘正应力：66max1108.18103.95101453639104167TxyMMWW上上2274.437.9112.3/215/NmmfNmm下翼缘正应力：621108.181074.4/1426498xxMNmmW2215/fNmm②剪应力突缘支座处剪应力:3max01.21.291.1110.4808wVht2228.5/125/vNmmfNmm③腹板局部稳定52505102134368zyRlahhmm322v1.057.541019.5/f=125N/mm8368cwzFNmmtl3）稳定性验算：①整体稳定性11116000100.482250500ltbh0.730.180.730.180.480.816b341102501302083312Imm34210200666666712Imm112130208330.661130208336666667bIII0.8(21)0.820.66110.258bb2124320235..14.4ybbbyxytAhWhf2243208340500123.5102350.81610.258123.514536394.45002350.9310.6'0.2820.2821.071.070.7671.00.931bb'0.767b66'108.18103.951097.020.9.0.76714536391.2157500xYbyyMMW22117.9/f=215N/mmNmm故满足整体稳定性要求。②局部稳定性翼缘：1125412.11510bt腹板：048060808wht4）加劲肋计算：①横向加劲肋的外伸宽度为：04804040563030shbmm，取100sbmm横向加劲肋的厚度为：1006.71515ssbtmm，取8stmm横向加劲肋的尺寸为8100。②支座加劲肋支座加劲肋尺寸采用1010020101001000Amm2015100015881960wwAAttmm3411010083333312zImm83333320.61960zzIimmA048023.320.6zzhi强度验算：322max091.111091.11/f=215N/mm1000VNmmA整体稳定验算：322max91.111048.5/f=215N/mm0.959960VNmmA5）疲劳计算本吊车为中级工作制吊车，不必进行疲劳验算。6）刚度验算6225108.18106000l1.051.43.71210102.0610342216763500MlmmmmEI7）焊缝连接计算：①上翼缘与腹板连接焊缝上翼缘对中和轴面积矩：3125010239.9599750Smm取6fhmm52505102134368zyRlahhmm32191.111059975019.0/20.720.76342216763ffxVSNmmhI321.057.541018.6/20.720.76368ffzFNmmhl22222219.018.626.6/160/wfffNmmfNmm②下翼缘与腹板连接焊缝下翼缘对中和轴面积矩：3220010260.1520200Smm322291.111052020016.5/160/20.720.76342216763wfffxVSNmmfNmmhI③支座加劲肋与腹板连接焊缝322max1.21.291.111027.6/160/20.720.764808wfffwVNmmfNmmhl