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：左半幅橋寬20.5m，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.求內橫梁截面和等剛度橋面板抗彎慣矩內橫梁翼板寬度取內橫梁間距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