张弦结构动力分析中的若干问题研究
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摘要
结合镇江体育中心会展馆的曲线形大跨度钢结构屋盖工程,对张弦结构动力分析中的若干问题进行了研究.首先分析了不同质量矩阵模式(一致质量矩阵和集中质量矩阵)对单榀张弦梁及整体张弦结构振型、频率的影响;其次,通过多维地震作用下的结构动力分析,研究了索张拉应变和索截面变化对张弦结构动力性能的影响.研究表明,不同的质量矩阵模式对单榀张弦梁的振型、频率计算结果影响较大,而对整体张弦结构的计算结果影响较小;索张拉预应力及索截面的变化改变了张弦结构的振动平衡位置、波动位移及结构抗震性能.
Some problems of dynamic analysis of beam-string structures are studied combined with the project of Meeting and Exhibition Hall of Zhenjiang Sport Center.First,the influence of different mass matrix modes(including lumped and consistent mass matrix) on natural frequency and mode shape are studied.Then,based on dyamic analysis of beam-string structure under multi-component ground motion excitation,the influence of different cable tensile strain and cross sectional area on dynamic performance of beam string structure is analyzed.The results show that mass matrix mode greatly affects dynamic performance of single beam string but makes little effect on integrate structure system.The variation of cable prestress level and cross-section area change the vibration balance position,displacement fluctuant extent and seismic performance of beam string structure.
Some problems of dynamic analysis of beam-string structures are studied combined with the project of Meeting and Exhibition Hall of Zhenjiang Sport Center.First,the influence of different mass matrix modes(including lumped and consistent mass matrix) on natural frequency and mode shape are studied.Then,based on dyamic analysis of beam-string structure under multi-component ground motion excitation,the influence of different cable tensile strain and cross sectional area on dynamic performance of beam string structure is analyzed.The results show that mass matrix mode greatly affects dynamic performance of single beam string but makes little effect on integrate structure system.The variation of cable prestress level and cross-section area change the vibration balance position,displacement fluctuant extent and seismic performance of beam string structure.
引文
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[2]钱若军,杨联萍.张力结构的分析.设计.施工[M].南京:东南大学出版社,2003.
[3]薛伟辰,刘晟,苏旭霖,等.上海源深体育馆预应力张弦梁优化设计与试验研究[J].建筑结构学报,2008,29(1):16-23.XUE Wei-chen,LI U Sheng,SU Xu-lin,et al.Designopti mization and experi mental study on prestressed beamstring of Shanghai Yuanshen Arena[J].Journal of Build-ing Structures,2008,29(1):16-23.
[4]吴欣之,薛备芬,钱震海,等.广州国际会展中心大跨度复杂形体的钢结构安装技术研究[J].建筑施工,2002,24(5):333-337.WU Xin-zhi,XUE Bei-fen,QIAN Zhen-hai,et al.Re-search on installation technique for steel structure ofGuangzhou International Conference Center with largespan and complex shape[J].Building Construction,2002,24(5):333-337.
[5]刘凯,高维成,刘宗仁.大跨张弦桁架新型施工工艺的理论与现场实测的研究[J].建筑结构学报,2004,25(5):16-23.LI U Kai,GAO Wei-cheng,LI U Zong-ren.Research ontheory and site test of new-type construction technologyfor truss string structure[J].Journal of Building Struc-tures,2004,25(5):16-23.
[6]秦杰,陈新礼,徐瑞龙,等.国家体育馆双向张弦结构节点设计与试验研究[J].工业建筑,2007,37(1):12-15.QINJie,CHEN Xin-li,XU Rui-long,et al.Design andexperi mental study on the joints of National Gymnasium[J].Industrial Construction,2007,37(1):12-15.
[7]王秀丽,李晓飞,薛晓峰.辐射式张弦梁结构自振特性和地震响应分析[J].空间结构,2010,16(1):24-28.WANG Xiu-li,LI Xiao-fei,XUE Xiao-feng.Analysis offree vibration characteristics and seismic response of ra-diant beam string structure[J].Spatial Structures,2010,16(1):24-28.
[8]孔丹丹,张海霞,赵欣.张弦网壳结构的自振特性及地震响应分析[J].世界地震工程,2008,24(4):136-141.KONG Dan-dan,ZHANG Hai-xia,ZHAO Xin.Dy-namic property and earthquake response analysis of ca-ble-strut-supported shell structure[J].World Earth-quake Engineering,2008,24(4):136-141.
[9]陈天宜,雷云,陈文明,等.镇江体育会展中心体育会展馆屋盖结构设计[J].建筑结构,2010,40(9):53-95.CHEN Tian-yi,LEI Yun,CHEN Wen-ming,et al.Structure design on roof of the exhibition gymnasium ofZhenjiang Sports and Exhibition Center[J].BuildingStructure,2010,40(9):53-95.
[10]汪梦甫,王朝晖.两种质量矩阵在梁模态分析中差异的比较[J].地震工程与工程振动,2006,26(6):83-86.WANG Meng-fu,WANG Zhao-hui.Analysis of differ-ences between two types of mass matrixes in beam mo-dal analysis[J].Earthquake Engineering and Engineer-ing Vibration,2006,26(6):83-86.
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