第2篇第3章 简支梁桥的计算3荷载横向分布计算偏心压力法A

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chapter 3 第三章 analysis of simple supported beam bridge 简支梁桥的计算3）荷载横向分布系数计算方法l杠杆原理法 method based on mechanics of leveragel偏心压力法method based on stiffness transverse connectionl横向铰接梁（板）法l横向刚接梁法l比拟正交异性板法 3.3 computation of coefficients

2、of transverse distribution of loads 荷载横向分布计算 3.3 computation of coefficients of transverse distribution of loads 荷载横向分布计算3. method based on stiffness transverse connection偏心压力法1）assumption 基本假设 the stiffness of the transverse connection is very strong, the deformation of the connection is negligible

3、. 横梁刚性极大,刚性横梁的微小变形可以忽略不计 p/2p/2ppblffff f 3.3 computation of coefficients of transverse distribution of loads 荷载横向分布计算3. method based on stiffness transverse connection偏心压力法2）suitability of the assumption 基本假设的适用范围 试验证明，当b/lmcmcm0m0mcm0m0mc m0边梁 中梁 3.3 computation of coefficients of transverse distr

4、ibution of loads 荷载横向分布计算荷载横向分布系数沿桥跨的变化的几种情况：mcm0m0mcm0m0mcm0m0mcm0m0q0影响线mc影响线 3.4 computing the internal forces of the main girder 主梁内力计算1.恒载内力计算 结构自重 桥面铺装 附属设施重量根据施工的过程决定分别计算不同阶段的恒载 3.4 computing the internal forces of the main girder 主梁内力计算2. 活载内力计算1)()1 (yyypmqmsiikckcm0mcpky1mc影响线荷载横向分布系数pkqkr

5、cqms人 3.4 computing the internal forces of the main girder 主梁内力计算2. 活载内力计算)(2)1 (2010ymmqaqmypmsckkckmckq0影响线荷载横向分布系数m0mcpkqkay1y220)(2ymmqaqmsckrc人 3.4 computing the internal forces of the main girder 主梁内力计算3. 内力组合对于简支梁，最不利组合：1.2 恒荷载恒荷载+1.4 汽车荷载汽车荷载+0.8 1.4 人群荷载人群荷载 3.4 computing the internal forces of the