淘金彩票

钢结构构件设计的CAD技术

添加时间:2018-11-17 9:37:19 科研资讯 阅读:609 来源:中国钢结构网 作者:

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  在这部分程序的编制过程中,对钢结构中轴心受拉、轴心受压、拉弯及压弯等各种构件受力用户截面窗体图形式分别给予考虑。结合钢结构构件设计的知识,对构件的强度、整体稳定、局部稳定、刚度及挠度等各方面均进行计算和分析,并通过VisualBasic中数据库编程技术,调用材料库,通过不断的比较和判断之后,从材料库中选择一种既安全可靠又经济的截面型号。在这个过程中,VisualBasic主要是在窗体上采用了Data控件和约束数据控件来实现与钢结构构件材料库连接的。该计算过程可以分别对轴心受拉、轴心受压、拉弯、压弯等不同受力构件进行截面设计,其中可供选择的截面形式包括:热扎工字型截面、槽型截面、槽型组合截面、角钢组合截面、H型截面及圆管截面等。为了使用户更方便地获得构件截面的型号和截面尺寸与特性,可有3种方法将该结果提供给用户。①通过VisualBasic编制的用户界面向用户提供截面尺寸和截面特性。见图型截面窗口种格式将构件截面的尺寸型号及特性写到某一输出数据文件中,然后用户可通过调用该输出数据文件来访问截面信息。③将该输出数据文件再通过OLE技术转化成AutoCAD中,用户可直接从AutoCAD中访问截面信息。在利用建筑结构设计软件计算时,必须初步根据设计经验来假设一组构件的截面型号、尺寸和特性。然后,在此基础之上计算出构件的内力,再把这些内力调用到本软件中,通过该软件进行计算和选材,从而由其得到另一组构件的截面型号、尺寸和特性。这2组的数据不可能完全吻合,故要在VisualBasic中调用建筑结构设计软件来重亲新截面尺寸窗体图计算。在重新计算过程中,要把由本软件计算出的截面型号、尺寸和特性作为建筑结构设计软件的初始截面信息,计算出构件的内力,再把这些内力重新调用。这样反复循环2~3次便可以得出一个较好的截面型号。由于在VisualBasic中调用PKPM软件较难,计算机尚未完成该过程的自动执行,目前只能依赖于手工完成。

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  6结语本文针对钢结构构件设计中的CAD技术且结合现行的钢结构设计规范(GB17―88),介绍了钢结构构件设计程序的编制过程。通过该程序的编制与运用,可以有效地将钢结构构件设计的CAD技术推广到设计实践中来,大大加快了设计速度和提高了设计效率,这必将给工程设计带来可观的经济淘金彩票效益。本程序是一个通用程序,与常用结构设计程序具有良好的兼容性和开放性。随着研究工作的深入,它将不断完善并逐步被广大用户接受和应用。


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