中央开洞网架结构的静力与动力分析
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摘要
以弹性支座下的中央开有矩形洞口的双层正放四角锥网架结构为研究对象,利用SAP2000对开洞网架和不开洞网架结构进行了静动力特性分析,对比了两种结构之间静动力特性的差异,并获得了中央开洞网架结构内力和位移的变化规律。结果表明:开洞网架与未开洞网架弦杆内力分布规律显著不同,但腹杆无明显区别;开洞网架结构的动内力分布规律和静力分布规律一致;加强洞口对网架的刚度有明显提高。
As the research object,the double-layer pyramid grid structure with a rectangular opening in the central is studied under the elastic support.The analysis of static and dynamic behavior of space grid and space grid with opening is conducted by the FEM of SAP2000,and then,the differences between the two results are compared.The variation of the internal force and displacement is obtained.The results indicate that the distribution law of chord internal force between the space grid and space grid with opening is significant different,however,no obvious differences appear in the web member;the distribution of dynamic and static internal force of the grid with open hole represent consistently;reinforcing the hole of grid can improve the stiffness notably.
As the research object,the double-layer pyramid grid structure with a rectangular opening in the central is studied under the elastic support.The analysis of static and dynamic behavior of space grid and space grid with opening is conducted by the FEM of SAP2000,and then,the differences between the two results are compared.The variation of the internal force and displacement is obtained.The results indicate that the distribution law of chord internal force between the space grid and space grid with opening is significant different,however,no obvious differences appear in the web member;the distribution of dynamic and static internal force of the grid with open hole represent consistently;reinforcing the hole of grid can improve the stiffness notably.
引文
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[3]董石麟,钱若军.空间网格结构分析理论与计算方法[M].北京:中国建筑工业出版社,2000.
[4]石异.大矢跨比开孔单层球面网壳的设计与分析[D].北京:清华大学,2007.
[5]杨睿.中国闽台缘博物馆屋面钢网架结构设计[J].福建建筑,2009(6):45-46.
[6]Troyer Steve,Griffis Kurt,Shackelford Ray.Structure Truss Elements and Forces[J].Tech Directions,2005,65:13-15.
[7]柳春光,李会军,林桂枫.不同支座约束下网架结构的动力特性对比[J].辽宁工程技术大学学报:自然科学版,2009,28(5):746-749.
[8]朱一平.正放四角锥网架与下部支承体系整体结构空间分析研究[D].合肥:合肥工业大学,2006.
[9]张明文.平板网架与下部支承结构整体工作分析研究[D].西安:西安建筑科技大学,2010.
[10]李靖.空间网架自振特性和地震响应分析[D].长沙:湖南大学,2007.
[11]中华人民共和国建设部.GB50017—2003钢结构设计规范[S].北京:中国计划出版社,2003.
[12]中国建筑科学研究院,浙江大学.JGJ7—91网架结构设计与施工规程[S].北京:中国建筑工业出版社,1991.
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