体内张拉成形空间网格结构自振特性研究
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摘要
体内张拉成形空间网格结构是由上弦梁、下弦(下弦管内穿索)、腹杆以及环杆等构件组成的一种新型空间结构形式,是通过对下弦管内索施加预应力张拉成形,进而改善结构受力性能的自平衡体系。文章利用ANSYS软件中的子空间迭代法,分析了体内张拉成形空间网格结构的自振特性,并针对不同的参数如矢跨比、立柱高度、预应力大小、腹杆数量以及环杆数量进行了参数分析,得出了各参数对结构的自振特性的影响。
Internal-prestressed reticulated space structure is a novel prestressed long span structure,which is composed of upper chord,lower chord,web member and lateral support member.The erection of this structure into its final configuration is achieved by tensioning prestressing cables passing through the lower chord,which can improve its mechanical characteristics.The free vibration characteristics of this structure are analyzed in this paper by ANSYS with the method of subspace iteration.Through analysis of the different parameters,such as rise-span ratio,height of column,prestress,number of the web member and lateral support member,the influence of these parameters on the free vibration characteristics as well as the pattern of free vibration were obtained.
Internal-prestressed reticulated space structure is a novel prestressed long span structure,which is composed of upper chord,lower chord,web member and lateral support member.The erection of this structure into its final configuration is achieved by tensioning prestressing cables passing through the lower chord,which can improve its mechanical characteristics.The free vibration characteristics of this structure are analyzed in this paper by ANSYS with the method of subspace iteration.Through analysis of the different parameters,such as rise-span ratio,height of column,prestress,number of the web member and lateral support member,the influence of these parameters on the free vibration characteristics as well as the pattern of free vibration were obtained.
引文
[1]张毅刚,王成,等.一种新型的空间结构形式—体内张拉成形空间网格结构[J].工业建筑,2007,37(增刊):71-74.
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[4]王成,张毅刚,等.体内张拉成形空间网格结构受荷过程腹杆影响分析[J].工业建筑,2008,38(11):89-92.
[5]刘晶波,杜修力.结构动力学[M].北京:机械工业出版社,2005.
[6]陈波.几何非线性对空间网架结构自振特性的影响[J].甘肃工业大学学报,1995,21(1):64-68.
[7]李杰,李国强.地震工程学导论[M].北京:地震出版社,1994.
[2]张毅刚,王成.辐射型体内张拉成形空间网格结构[P].中国专利:ZL200620113271.9,2007-05-09.
[3]王成,张毅刚,等.体内张拉成形空间网格结构成形后受荷过程参数分析[J].北京工业大学学报,2008,34(11):1179-1184.
[4]王成,张毅刚,等.体内张拉成形空间网格结构受荷过程腹杆影响分析[J].工业建筑,2008,38(11):89-92.
[5]刘晶波,杜修力.结构动力学[M].北京:机械工业出版社,2005.
[6]陈波.几何非线性对空间网架结构自振特性的影响[J].甘肃工业大学学报,1995,21(1):64-68.
[7]李杰,李国强.地震工程学导论[M].北京:地震出版社,1994.
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