桥梁工程简支梁桥的计算横隔梁内力计算

1、bridge engrgpart iipart 2 rc & pc beam bridge第二篇 钢筋混凝土和预应力混凝土梁式桥第五章 chapter 5 简支梁桥的计算analysis of simple supported beam bridge 5.5横隔梁内力计算computing the internal force on transverse beam 1.作用于横隔梁上的荷载作用于横隔梁上的荷载 load distributed on transverse beamn沿桥跨方向确定横隔梁上的计算荷载 假定荷载在相邻横隔梁之间按杠杆原理法传递。 按一列汽车车道荷载轮重分布给中横梁的

2、计算荷载为：pklay1qklaakkkkqlqypqypp11021)(21rlala人群arrrlpqp0r1.作用于横隔梁上的荷载作用于横隔梁上的荷载 load distributed on transverse beam 5.5横隔梁内力计算computing the internal force on transverse beam .偏压法计算横隔梁内力偏压法计算横隔梁内力computing the internal force based on the stiffness transverse beamn计算模型计算模型 model横隔梁相当于弹性支撑上的连续梁横隔梁相当于弹性支

3、撑上的连续梁continuous beam on elastic support ri=?pr1r2r3r4r5p 5.5横隔梁内力计算computing the internal force on transverse beam n 横隔梁的内力 当荷载p作用于r截面左边时，截面上的弯矩和剪力：r1r2r3r4r5p=1reb1b2p=1.偏压法计算横隔梁内力偏压法计算横隔梁内力computing the internal force based on the stiffness transverse beam 5.5横隔梁内力计算computing the internal force o

4、n transverse beam ebrebrbrmiir左122111121左irrrrqn 横隔梁的内力 当荷载p作用于r截面右边时，截面上的弯矩和剪力：r1r2r3r4r5p=1rb1b2p=1右iirbrbrbrm2211右irrrrq21 5.5横隔梁内力计算computing the internal force on transverse beam .偏压法计算横隔梁内力偏压法计算横隔梁内力computing the internal force based on the stiffness transverse beamn 横隔梁的内力 aar截面弯矩影响线p=1e1r截面剪

5、力影响线p=1e 5.5横隔梁内力计算computing the internal force on transverse beam .偏压法计算横隔梁内力偏压法计算横隔梁内力computing the internal force based on the stiffness transverse beamn 横隔梁的内力影响线一般横隔梁的弯矩在靠近桥中心线的截面较大，如a、b截面剪力则在靠近桥两侧边缘处的截面较大,如c、d截面 p=1a bcd 5.5横隔梁内力计算computing the internal force on transverse beam .偏压法计算横隔梁内力偏压法计

6、算横隔梁内力computing the internal force based on the stiffness transverse beamn 横隔梁的内力影响线 1116r1r2r321263136梁处横隔梁截面的弯矩影响线dddm22211131ddm3231233ddm2616236m31m33m36.偏压法计算横隔梁内力偏压法计算横隔梁内力computing the internal force based on the stiffness transverse beam 5.5横隔梁内力计算computing the internal force on transverse b

7、eam n 横隔梁的内力影响线 梁处横隔梁截面的弯矩影响线dddm22211131ddm2616236m31m36aa2d 5.5横隔梁内力计算computing the internal force on transverse beam .偏压法计算横隔梁内力偏压法计算横隔梁内力computing the internal force based on the stiffness transverse beamn 横隔梁的内力影响线 梁、梁之间横隔梁截面的弯矩影响线ddddm5 . 25 . 05 . 15 . 23121111)43(dddm5 . 05 . 15 . 23626166)4

8、3(m(3-4)1m(3-4)62.5d 5.5横隔梁内力计算computing the internal force on transverse beam .偏压法计算横隔梁内力偏压法计算横隔梁内力computing the internal force based on the stiffness transverse beamn 横隔梁的内力影响线 梁处横隔梁截面的剪力影响线1211121 右右q261626 右右qq21q2611 5.5横隔梁内力计算computing the internal force on transverse beam .偏压法计算横隔梁内力偏压法计算横隔梁内力computing the internal force based on the stiffness transverse beamn 横隔梁的内力计算 l确定作用在中横隔梁上的计算荷载 akkkkqlqypqypp11021)(21pklay1qkla 5.5横隔梁内力计算computing the internal force on transverse beam n 横隔梁的内力计算l绘制中横隔梁的内力影响线l布置荷载，计算截面内力 iqps01q21q26m31m36p/2p/2p/2p/2 5.5横隔梁内力计算computing the inte