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工程力学  2013 

三边固支一边自由混凝土矩形薄板的热弯曲

DOI: 10.6052/j.issn.1000-4750.2011.12.0865, PP. 97-106

Keywords: 混凝土,三边固支一边自由,矩形薄板,温度,挠度,弯矩

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Abstract:

为了得到温度作用下三边固支一边自由混凝土矩形薄板的挠度和弯矩解析解。该文基于薄板的小挠度理论和叠加原理,考虑横向变温情况,将温度作用下的三边固支一边自由矩形薄板看作是面内温差作用下的三边简支一边自由的矩形薄板和相邻三边作用弯矩的三边简支一边自由矩形薄板的叠加。首先,通过在自由边界上试设具有待定参数的挠度函数,采用李维解法,推导出三边简支一边自由矩形薄板在自由边界挠度函数作用下的解析解;其次,推导出温度作用下三边简支一边自由矩形薄板的解析解;再之,利用相邻三边弯矩作用下四边简支矩形薄板的解答,推导出相邻三边弯矩作用下三边简支一边自由矩形薄板的解答;最后,采用叠加原理得出横向变温作用下三边固支一边自由矩形薄板的挠度和弯矩解析解,并利用MATLAB编制程序得到横向变温作用下三边固支一边自由矩形薄板的计算系数用表,从而为以后工程结构中三边固支一边自由混凝土矩形薄板在热环境下的设计计算提供了理论依据。

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