某橋m橫向分布計算

橫向分布計算米水一橋（K31+200.5）一、50mT梁左半幅，基本資料：左半幅橋?qū)?0.5m，橋面寬20.25m.T梁組成：1.375m+72.5m+1.375m（8片梁）.求主梁截面豎向抗彎慣性矩I.近似取翼板平均厚度為0.28m，求截面形心位置距梁底的距離以及抗彎慣性矩I.截面豎向抗彎慣性矩：2.求主梁截面抗扭慣性矩.將T梁劃分為2.120.2m的梁肋部分、橋面寬20m0.28m的橋面板及馬蹄部分，然后將其相加.（c值按《公路橋梁荷載橫向分布計算》第二版查表得）橋面板：,故取c=1/3梁肋：，故取c=1/3馬蹄：，故取c=0.2093.求內(nèi)橫梁截面和等剛度橋面板抗彎慣矩內(nèi)橫梁翼板寬度取內(nèi)橫梁間距7m，翼板厚取橋面板靠主梁肋d/3處板厚0.2967m作為翼板厚度，腹板厚取0.2m，腹板高2.12m.截面形心距梁底的距離為,內(nèi)橫梁截面抗彎慣性矩：等剛度橋面板抗彎慣性矩：]4.主梁抗彎與抗扭剛度比例參數(shù)和主梁與橋面板抗彎剛度比例參數(shù).5.橋梁橫向分布系數(shù)計算查剛接板、梁橋荷載橫向分布影響線表（《公路橋梁荷載橫向分布計算》）第二版.梁號η1η2η3η4η5η6η7η81#395318241164869-68-1052#3182632081539742-13-683#16415314213111910897861#梁：兩列車：mq=(406.55+351.1+311.07+255.63)/2/1000=0.6622三列車：mq=(406.55+351.1+311.07+255.63+215.59+160.1)0.78/2/1000=0.663四列車：mq=(406.55+351.1+311.07+255.63+215.59+160.1+119.54+63.97)0.67/2/1000=0.63092#梁：兩列車：mq=(326.25 +286.65+258.05+218.45)/2/1000=0.5447三列車：mq=(326.25+286.65+258.05+218.45+ 189.85+ 150.2)0.78/2/1000=0.5575四列車：mq=（326.25+286.65+258.05+218.45+189.85+150.2+121.08+81.05）0.67/2/1000=0.5466五列車：mq=（326.25+286.65+258.05+218.45+189.85+150.2+121.08+81.05+52.45+12.85)0.6/2/1000=0.50914#梁：兩列車：mq=(165.65+157.73+152.01+144.09)/2/1000=0.3097三列車：mq=(165.65+157.73+152.01+144.09+138.37+130.4)0.78/2/1000=0.3464四列車：mq=(165.65+157.73+152.01+144.09+138.37+130.4+124.16+115.81)0.67/2/1000=0.3780五列車：mq=(165.65+157.73+152.01+144.09+138.37+130.4+124.16+115.81+110.09+102.17)0.6/2/1000=0.4021六列車：mq=(165.65+157.73+152.01+144.09+138.37+130.4+124.16+115.81+110.09+102.17+96.45+88.530.55/2/1000=0.4195故取邊梁：mq=0.663中梁：mq=0.5575二、右半幅(5梁式)求主梁跨中荷載橫向分布系數(shù)：查表得：梁號η1η2η3η4η51#531366200341312#366283200117343#2002002002002001#梁：兩列車：mq=(555.75+436.95+351.06+231.54)/2/1000=0.7877三列車：mq=(555.75+436.95+351.06+231.54+145.22+25.75)0.78/2/1000=0.68102#梁：兩列車：mq=（378.45+318.69+275.53 +215.77）/2/1000=0.5942三列車：mq=(378.45+318.69+275.53+215.77+172.61+112.85)0.78/2/1000=0.57483#梁：兩列車：mq=（2004）/2/1000=0.4三列車：mq=(2006)0.78/2/1000=0.468故取邊梁：mq=0.7877中梁：mq=0.5942K43+426江田米水大橋三、右半幅(6梁式)求主梁跨中荷載橫向分布系數(shù)：查表得：梁號η1η2η3η4η5η61#479354229104-21-1462#35427920412954-213#229204179154129104eq\o\ac(○,1)車輛布載從左至右：汽車人行汽車人行1#梁：兩列車：mq=(385.25+295.25+230.25+140.25)/2/1000=0.5255三列車：mq=(385.25+295.25+230.25+140.25+75.25-14.75)0.78/2/1000=0.4335人行：mr=0.4352#梁：兩列車：mq=（297.75+243.75+204.75 +150.75）/2/1000=0.457三列車：mq=(297.75+243.75+204.75+150.75+111.75+57.75)0.78/2/1000=0.4159人行：mr=0.3283#梁：兩列車：mq=（210.25+192.25+179.25+161.25）/2/1000=0.3715三列車：mq=(210.25+192.25+179.25+161.25+148.25+130.25)0.78/2/1000=0.3984人行：mr=0.220eq\o\ac(○,2)車輛布載從右至左：汽車人行汽車人行1#梁：兩列車：mq=(485.25+395.25+330.25+240.25)/2/1000=0.7255三列車：mq=(485.25+395.25+330.25+240.25+175.25+85.25)0.78/2/1000=0.6675人行：mr=02#梁：兩列車：mq=（357.75+303.75+264.75+210.75）/2/1000=0.5685三列車：mq=(357.75+303.75+264.75+210.75+171.75+117.75)0.78/2/1000=0.5563人行：mr=03#梁：兩列車：mq=（230.25+212.25+199.25+181.25）/2/1000