辐射式张弦梁结构动力特性分析及稳定性研究
发布时间：2018-08-30 18:47
【摘要】： 本文以烟台龙口南山集团会展中心X区的辐射式张弦梁结构为背景,采用有限元软件SAP2000,对结构进行了模态分析,得到了结构的自振特性,并讨论了支座节点、预应力、撑杆位置等参数对结构模态特性的影响；对结构进行了时程分析,并结合工程特点,对结构的单榀桁架进行了的稳定性分析。 研究结果表明：预应力拉索增大了结构刚度,减小了变形。结构的自振频率较小；由于索的振动作用,对称结构没有成对出现对称振型；模态分析的讨论表明：支座节点对结构的高阶模态影响较为明显；拉索的初始预应力对结构的自振频率几乎没有影响,撑杆的数量对结构的高阶振型有微小影响。时程分析显示在地震波的激励下结构的时程曲线性质基本相同,在激励时间内表现稳定,结构的抗震性能良好；结构的非线性屈曲荷载远小于其线性的屈曲荷载,在进行大跨度的结构设计时要充分考虑稳定性对结构安全性的影响,进行非线性的屈曲分析。 研究结果表明：辐射式张弦梁结构时受力性能良好,抗震性能和稳定性优良,可以满足大跨度结构的使用要求,广泛应用于工程实际。
[Abstract]:In this paper, based on the radiation beam string structure in the X area of Yantai Longkou Nanshan Group Exhibition Center, the modal analysis of the structure is carried out by using finite element software SAP2000, and the natural vibration characteristics of the structure are obtained, and the bearing joints and prestress are discussed. The influence of bracing position and other parameters on the modal characteristics of the structure is analyzed, and the time history analysis of the structure is carried out, and the stability analysis of the single truss is carried out in combination with the engineering characteristics. The results show that the prestressing cable increases the stiffness of the structure and reduces the deformation. The vibration frequency of the structure is small, because of the vibration of the cable, the symmetrical vibration of the symmetrical structure does not appear in pairs, and the discussion of the modal analysis shows that the influence of the support node on the higher-order modes of the structure is obvious. The initial prestress of cable has little effect on the natural vibration frequency of the structure, and the number of strut has little effect on the higher vibration mode of the structure. The time-history analysis shows that the time-history curve of the structure under the excitation of seismic wave is basically the same, and it is stable in the excitation time, and the seismic performance of the structure is good, and the nonlinear buckling load of the structure is far less than the linear buckling load of the structure. The influence of stability on structural safety should be taken into account in the design of long span structures, and nonlinear buckling analysis should be carried out. The results show that the radiation beam string structure has good mechanical performance, good seismic performance and good stability. It can meet the requirements of large span structure and is widely used in engineering practice.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2010
【分类号】：TU399
本文编号：2213975
[Abstract]:In this paper, based on the radiation beam string structure in the X area of Yantai Longkou Nanshan Group Exhibition Center, the modal analysis of the structure is carried out by using finite element software SAP2000, and the natural vibration characteristics of the structure are obtained, and the bearing joints and prestress are discussed. The influence of bracing position and other parameters on the modal characteristics of the structure is analyzed, and the time history analysis of the structure is carried out, and the stability analysis of the single truss is carried out in combination with the engineering characteristics. The results show that the prestressing cable increases the stiffness of the structure and reduces the deformation. The vibration frequency of the structure is small, because of the vibration of the cable, the symmetrical vibration of the symmetrical structure does not appear in pairs, and the discussion of the modal analysis shows that the influence of the support node on the higher-order modes of the structure is obvious. The initial prestress of cable has little effect on the natural vibration frequency of the structure, and the number of strut has little effect on the higher vibration mode of the structure. The time-history analysis shows that the time-history curve of the structure under the excitation of seismic wave is basically the same, and it is stable in the excitation time, and the seismic performance of the structure is good, and the nonlinear buckling load of the structure is far less than the linear buckling load of the structure. The influence of stability on structural safety should be taken into account in the design of long span structures, and nonlinear buckling analysis should be carried out. The results show that the radiation beam string structure has good mechanical performance, good seismic performance and good stability. It can meet the requirements of large span structure and is widely used in engineering practice.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2010
【分类号】：TU399
【引证文献】
相关硕士学位论文 前2条
1 栾翠翠;巨型钢框架结构中巨型梁的布置对整体结构抗震性能的影响以及巨型梁的优化设计[D];西南交通大学;2012年
2 胡瑞星;输煤栈桥钢桁架的动力特性分析及振动控制研究[D];西安建筑科技大学;2012年
，本文编号：2213975
本文链接：https://www.wllwen.com/guanlilunwen/huizhanguanlilunwen/2213975.html
