论文部分内容阅读
本設計是在原大057标准图基础上进行修改和补充,跨度自16m至32m,每4m一进,主要变动如下: 1.原設計是按1951年桥規进行,1959年桥規对板梁在挠曲时的容許应力由1400kg/cm~2,改为1500kg/cm~2,并规定腹板稳定性的检算方法,因此,大梁截面及加劲角鋼的布置均应加以变动以节約鋼材,同时根据1959年桥规对受挠曲梁的换算应力的规定,原設計的腹板强度不够,也予以改善。 2.原設計纵梁采用的60＃工字鋼,本設計已将纵梁高度降低而采用55c＃工字鋼,既降低了建筑高度,也符合了我国目前鋼材生产情况。 3.原設計桥面上弯度采用一种普通桥枕(20×24
The design is based on the original 057 standard chart to modify and supplement, span from 16m to 32m, every 4m into a major changes are as follows: 1. The original design is carried out according to the 1951 bridge gauge, 1959 bridge gauge on the beam in The allowable stress during flexing is changed from 1400kg / cm ~ 2 to 1500kg / cm ~ 2, and the checking method of the web stability is stipulated. Therefore, the layout of the girder section and the stiffening angle steel should be changed to save the steel, At the same time, according to the provisions of the 1959 bridge gauge on the converted stress of flexural beams, the strength of the original design of the webs was insufficient and also improved. 2. The original design of 60 # beam used in the stringers, the design has been to reduce the height of the stringers using 55c # I-beam, both to reduce the building height, but also in line with China’s current steel production. 3. The original design of the bridge deck using a common bridge (20 × 24