混凝土简支梁设计

2025-04-02 08:57:27
推荐回答(3个)
回答1:

  混凝土简支梁及空心板桥设计一般规定
  1 简支梁应尽可能采用预应力混凝土结构。简支梁截面形式可采用T形、I形或箱形等,具体设计可根据桥宽、桥长、跨径等条件选择。
  2 当桥梁跨径小于或等于20m时,可考虑采用空心板,截面形式为矩形,其孔洞可为园形、椭圆形或八边形等。对于空心板:跨径6m≤L<10m宜采用钢筋混凝土结构;跨径10m≤L≤25m宜采用预应力混凝土结构。
  3 简支T梁梁中距宜选择为 7m~2.0m。当建筑高度不受限制时,也可进行梁格优化,梁中距可加至2.5m左右,以取得较经济的效果。T梁预制宽度不宜小于 2m,现浇段宽度不得小于0.5m。
  4 简支梁边梁均应设置外悬臂,其长度空心板不宜小于0.5m,T梁悬臂宜采用 0~ 5m,简支箱梁悬臂宜采用 5~2.0m。
  5 简支T形、I形或箱形梁梁高应根据跨径、梁中距、荷载及结构厚度要求等条件确定。高跨比一般在1/16~1/20左右。
  6 预制简支梁应加强横向连接。简支T梁之间的桥面板采用现浇段连接并设置跨间横梁,横梁间距不宜大于7m。
  7 多孔简支梁结构应采用连续桥面。每一联的长度应综合考虑整体温差、柱高、支座及伸缩缝性能等因素确定,一般不宜超过150m。
  8 空心板桥应符合下列要求:
  (1)斜空心板桥的斜度一般要求小于45°(含45°),当斜度大于45°时,宜调整道路线形,或改用其它结构形式。
  (2)空心板应采用最新版本的《公路桥涵标准图》。并可根据桥梁设计要求,进行局部修改,但同一种结构必须采用同一种标准图。当条
  件限制不能套用标准图时,可参照标准图的跨径、斜度及构造自行设计。
  (3)空心板预制宽度一般采用 0m~ 5m。
  (4)空心板桥应采取有效措施加强预制板之间的横向联系,防止使用过程中发生单板受力状况。
  9 简支梁、板宜采用后张预应力混凝土结构,空心板构件,当跨径10m≤L≤16m时,也可采用直线配筋的先张预应力混凝土结构。预应力钢筋可采用规范规定的钢丝、钢铰线及标准强度为1860MPa的高强低松弛钢铰线,如采用低松弛钢铰线应在图纸中予以说明。预应力钢筋均应按行业标准符号标注。
  设计中应采用经过鉴定并符合国家标准和行业标准的锚具,预应力锚具、锚下钢筋及波纹管应按产品手册配套使用。
  10 为减小预应力简支T梁由于预加力弹性变形及徐变产生的上拱度,设计时应要求采用预应力二次张拉工艺或其它可靠的控制预应力后期上拱的措施。为减小中、边梁上拱度之差,可适当降低边梁处支座高程。为控制简支梁和空心板在预制阶段的上拱值,要求存梁时间不大于3个月。对于腹板不铅直放置的T形或I形梁,存梁时应要求施工单位注意采取措施防止腹板侧弯。
  11 空心板安装时应要求施工单位采取措施保证四个支座受力,防止有支座脱空的现象。

回答2:

就设计 一根简支梁?同学是哪个学校的呀,这么爽。想当年我上学时,课程设计至少是一个现浇钢筋砼的楼盖,虽然计算过程和一个简支梁相差不大。
说说正事吧,太多年没有接触这些东东了,忘得差不多了
1、确定材料规格,型号,比如水泥425,砼的强度等级,钢筋一级的做箍筋,二级作主筋等;
2、确定梁的尺寸,荷载形式和值;
3、基本尺寸复核,载荷分析计算
4、梁受力计算
5、配筋计算、复核
6、画图
好像就是这些吧,毕业8年了,忘记得差不多了。但却是很简单却很的意思的作业。

回答3:

这咱和我的一样,你是哪个班的,我也河北工业

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