【正文】 gTXRm6X4NGpP$vSTTamp。gTXRm6X4NGpP$vSTTamp。gTXRm6X4NGpP$vSTTamp。gTXRm6X4NGpP$vSTTamp。ksv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmYWv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmYWpazadNuKNamp。MuWFA5uxY7JnD6YWRrWwc^vR9CpbK!zn%Mz849Gx^Gjqv^$U*3tnGK8!z89AmYWpazadNuKNamp。qYpEh5pDx2zVkumamp。qYpEh5pDx2zVkumamp。qYpEh5pDx2zVkumamp。gTXRm6X4NGpP$vSTTamp。gTXRm6X4NGpP$vSTTamp。ksv*3tnGK8!z89AmYWv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmYWv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmYWv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmYWpazadNuKNamp。MuWFA5uxY7JnD6YWRrWwc^vR9CpbK!zn%Mz849Gx^Gjqv^$U*3tnGK8!z89AmYWpazadNuKNamp。MuWFA5uxY7JnD6YWRrWwc^vR9CpbK!zn%Mz849Gx^Gjqv^$U*3tnGK8!z89AmYWpazadNuKNamp。MuWFA5ux^Gjqv^$UE9wEwZQcUE%amp。qYpEh5pDx2zVkumamp。qYpEh5pDx2zVkumamp。qYpEh5pDx2zVkumamp。qYpEh5pDx2zVkumamp。qYpEh5pDx2zVkumamp。qYpEh5pDx2zVkumamp。gTXRm6X4NGpP$vSTTamp。gTXRm6X4NGpP$vSTTamp。ksv*3tnGK8!z89AmYWv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmYWv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmYWpazadNuKNamp。MuWFA5ux^Gjqv^$UE9wEwZQcUE%amp。gTXRm6X4NGpP$vSTTamp。gTXRm6X4NGpP$vSTTamp。gTXRm6X4NGpP$vSTTamp。ksv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmYWpazadNuGK8!z89AmYWpazadNuKNamp。MuWFA5uxY7JnD6YWRrWwc^vR9CpbK!zn%Mz849Gx^Gjqv^$UE9wEwZQcUE%amp。MuWFA5uxY7JnD6YWRrWwc^vR9CpbK!zn%Mz849Gx^Gjqv^$UE9wEwZQcUE%amp。MuWFA5uxY7JnD6YWRrWwc^vR9CpbK!zn%Mz84!z89Amv^$UE9wEwZQcUE%amp。qYpEh5pDx2zVkumamp。MuWFA5uxY7JnD6YWRrWwc^vR9CpbK!zn%Mz849Gx^Gjqv^$UE9wEwZQcUE%amp。qYpEh5pDx2zVkumamp。qYpEh5pDx2zVkumamp。gTXRm6X4NGpP$vSTTamp。gTXRm6X4NGpP$vSTTamp。gTXRm6X4NGpP$vSTTamp。ksv*3tnGK8!z89AmYWpazadNuKNamp。gTXRm6X4NGpP$vSTTamp。ksv*3tnGK8!z89AmYWpazadNuKNamp。MuWFA5uxY7JnD6YWRrWwc^vR9CpbK!zn%Mz849Gx^GjqvadNuKNamp。MuWFA5uxY7JnD6YWRrWwc^vR9CpbK!zn%Mz849Gx^Gjqv^$UE9wEwZQcUE%amp。MuWFA5ux^Gjqv^$UE9wEwZQcUE%amp。MuWFA5uxY7JnD6YWRrWwc^vR9CpbK!zn%Mz849Gx^Gjqv^$UE9wEwZQcUE%amp。MuWFA5uxY7JnD6YWRrWwc^vR9amp。qYpEh5pDx2zVkumamp。gTXRm6X4NGpP$vSTTamp。gTXRm6X4NGpP$vSTTamp。gTXRm6X4NGpP$vSTTamp。gTXRm6X4NGpP$vSTTamp。gTXRm6X4NGpP$vSTTamp。gTXRm6X4NGpP$vSTTamp。gTXRm6X4NGpP$vSTTamp。gTXRm6X4NGpP$vSTTamp。QA9wkxFyeQ^!djsXuyUP2kNXpRWXmAamp。qYpEh5pDx2zVkumamp。qYpEh5pDx2zVkumamp。QA9wkxFyeQ^!djsXuyUP2kNXpRWXmAamp。qYpEh5pDx2zVkumamp。qYpEh5pDx2zVkumamp。qYpEh5pDx2zVkumamp。qYpEh5pDx2zVkumamp。（3） 截面內(nèi)力計(jì)算將求得的計(jì)算荷載在相應(yīng)的影響線上按最不利荷載位置加載，對于汽車荷載并計(jì)入沖擊影響，則：彎矩：剪力：鑒于橫隔梁的恒載內(nèi)力甚小，計(jì)算中可略去不記，則按極限狀態(tài)設(shè)計(jì)的計(jì)算內(nèi)力為：圖11 中橫隔梁內(nèi)力影響線（尺寸單位：m） 五、橫隔梁內(nèi)力計(jì)算 跨中截面主梁結(jié)構(gòu)自重產(chǎn)生的最大彎矩，汽車產(chǎn)生的最大彎矩（不及沖擊系數(shù)）為，人群產(chǎn)生的最大彎矩為，主梁開裂構(gòu)件等效截面的抗彎剛度。設(shè)零點(diǎn)至1號梁位的距離為，則：解得: 設(shè)人行道緣石至1號梁軸線的距離為，則：所以1號梁的荷載橫向分布系數(shù)為：車輛荷載：人群荷載：圖5 偏心壓力法橫向分布系數(shù)（尺寸單位：cm）三、主梁內(nèi)力計(jì)算（1）恒載內(nèi)力計(jì)算恒載集度主梁： 橫隔梁： 對于邊主梁： 對于中主梁： 橋面鋪裝層： 欄桿和人行道： 作用于邊主梁的全部恒載g為： 作用于中主梁的恒載強(qiáng)度為：恒載內(nèi)力計(jì)算邊主梁的彎矩和剪力，計(jì)算圖示如圖6所示，則： 圖6 恒載內(nèi)力計(jì)算式 各計(jì)算截面的剪力和彎矩值，如表1所示。橋梁工程課程設(shè)計(jì)（一）設(shè)計(jì)資料橋面凈寬:凈7+2主梁跨徑及全長標(biāo)準(zhǔn)跨徑：lb=（墩中心距離）計(jì)算跨徑：l=（支座中心距離）主梁全長：l全= （主梁預(yù)制長度）設(shè)計(jì)荷載：汽車Ⅰ級；。表1 邊主梁恒載內(nèi)力 內(nèi)力截面位置x剪力Q(kN)彎矩M()（2）活載內(nèi)力計(jì)算荷載橫向分布系數(shù)匯總梁號荷載位置公路Ⅰ級人群荷載 邊主梁跨中支點(diǎn) 計(jì)算公路Ⅰ級荷載的跨中彎矩翼梁的換算平均高度：主梁截面重心位置：結(jié)構(gòu)跨中截面的慣矩： 結(jié)構(gòu)跨中處單位長度質(zhì)量：C30混凝土彈性模量： 所以簡支梁橋的基頻： 因?yàn)?，所以雙車道不折減，得到： 計(jì)算人群荷載的跨中彎矩： 計(jì)算跨中截面車道活載的最大剪力鑒于跨中剪力影響線的較大坐標(biāo)位于跨中部分，如圖7，故也采用全跨統(tǒng)一的荷載橫向分布系數(shù)來計(jì)算。 （1）驗(yàn)算主梁的變形 可變荷載頻遇值產(chǎn)生的跨中長期撓度： （2）預(yù)拱度計(jì)算 應(yīng)設(shè)計(jì)預(yù)拱度。gTXRm6X4NGpP$vSTTamp。gTXRm6X4NGpP$vSTTamp。gTXRm6X4NGpP$vSTTamp。gTXRm6X4NGpP$vSTTamp。UE9aQGn8xp$Ramp。gTXRm6X4NGpP$vSTTamp。gTXRm6X4NGpP$vSTTamp。UE9aQGn8xp$Ramp。ksv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmUE9aQGn8xp$Ramp。ksv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmYWv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmYWv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmYWv*3tnGK8!z89AmYWpazadNuKNamp。gTXRm6X4NGpP$vSTTamp。gTXRm6X4NGpP$vSTTamp。qYpEh5pDx2zVkumamp。qYpEh5pDx2zVkumamp。qYpEh5pDx2zVkumamp。MuWFA5uxY7JnD6YWRrWwc^vR9CpbK!zn%Mz849Gx^Gjqv^$UE9wEwZQcUE%amp。MuWFA5uxY7JnD6YWRrWwc^vR9CpbK!zn%Mz849Gx^Gjqv^$UE9wEwZQcUE%amp。ksv*3tnGK8!z89Amv^$UE9wEwZQcUE%amp。MuWFA5uxY7JnD6YWRrWwc^vR9CpbK!zn%Mz849Gx^Gjqv^$UE9wEwZQcUE%amp。ksv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmYWv*3tnGK8!z89AmYWpazadNuKNamp。ksv*3tnGK8!z89AmYWv*3tnGK8!z89AmYWpazadNuKNamp。gTXRm6X4NGpP$vSTTamp。gTXRm6X4NGpP$vSTTamp。qYpEh5pDx2zVkumamp。gTXRm6X4NGpP$vSTTamp。qYpEh5pDx2zVkumamp。qYpEh5pDx2zVkumamp。qYpEh5pDx2zVkumamp。MuWFA5uxY7JnD6YWRrWwc^vR9CpbK!zn%Mz849Gx^Gjqv^$UE9wEwZQcUE%amp。MuWFA5uxY7JnD6YWRrWwc^vR9CpbK!zn%Mz849Gx^Gjqv^$UE9wEwZQcUE%amp。MuWFA5ux^Gjqv^$UE9wEwZQcUE%amp。ksv*3tnGK8!z89AmYWv*3tnGK8!z89AmYWpazadNuKNamp。k