结构设计原理—课程设计

730.284支点0.72503、计算控制截面的跨中弯矩、支点剪力和跨中剪力简支梁的基频:817.410583.106626.01025.35.1922310221?????????ccmEIlf根据《公路桥涵设计通用规范》(JTGD60-2004)中要求:当HzfH14z5.1??时,0157.0ln176.0??f?,则可得:262.10157.0817.4ln176.011?????)(?1??,四车道不折减kNPmkNkk238)55055.191(180;/5.10q??????875.44;53.475.198181222??????lyml?荷载横向分布系数如上表(1)计算跨中弯矩故得:1#梁和6#梁车道荷载的跨中弯矩:mkNyPqmMkkcqql???????????????96.1043)875.423853.475.10(68.01262.1)()1(2???人群荷载的跨中弯矩mkNpmMrcr??????????7.6453.47)75.00.3(605.0r21?2#梁和5#梁车道荷载的跨中弯矩:mkNyPqmMkkcqql???????????????38.844)875.423853.475.10(547.01262.1)()1(2???人群荷载的跨中弯矩mkNpmMrcr??????????34.4853.47)75.00.3(452.0r21?3#梁和4#梁车道荷载的跨中弯矩:mkNyPqmMkkcqql???????????????17.726)875.423853.475.10(473.01262.1)()1(2???人群荷载的跨中弯矩mkNpmMrcr??????????37.3053.47)75.00.3(284.0r21?(2)、跨中剪力跨中剪力影响线如下图:跨中剪力影响线438.25.05.192121??????m1#梁和6#梁