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钢箱梁顶推作用下底板腹板局部应力 abaqus模型
2022-04-22 12:28:00 【安设一声77】
1. 计算依据
1. 钢结构设计规范(GB50017-2003)
2.模型的建立
本工程钢箱梁为正交异性板,顶板厚16~24mm、底板厚14~24mm,顶板纵肋大部分采用T形肋,T形肋面板规格12×100mm、腹板规格10×150mm,挑臂处的顶板局部采用扁平板肋,加劲板规格16×180mm、16×160mm、12×120mm;底板纵肋也采用T形肋,T形肋面板规格12×100mm、腹板规格10×150mm;钢箱梁设3道竖直腹板,板厚14~24mm,内、外腹板3道扁平加劲肋,中腹板采用6扁平加劲肋,加劲板规格14×150m;横隔板标准段布置间距为2m,横隔板厚12mm;支点处隔板板厚加强至24mm。钢板采用Q345qD。
具体结构见下图。
为消除边界条件对计算结果的影响,本报告基于通用有限元软件abaqus和midas建立15米,11米长标准段主梁的精细化模型,单元类型为shell,midasz中单元类型为板单元,钢材弹性模量为2.0e11,泊松比0.3,密度7800kg/m^3。
模型的边界条件如下:
1. 主梁端部一端约束节点6个方向自由度,相当于固结,主梁另一端开发顺桥向纵向位移,约束竖向和横向位移。
上述计算结果表明,与底面接触的中腹部和底板附近的局部应力较大,同时应该考虑施工误差,以及边滑道的分配比例的不确定性,因此对原有结构滑道区域进行加固。
版权声明
本文为[安设一声77]所创,转载请带上原文链接,感谢
https://blog.csdn.net/cywtiancai/article/details/80392323
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