预应力悬索结构的动力模型及模态响应分析  

Analysis on dynamical model and modal response of stressed cable structure

作　　者：杜文学[1,2] 张令心[2] 韩雪[1] 胡明祎[2] 

机构地区：[1]黑龙江科技大学建筑工程学院,哈尔滨150022 [2]中国地震局工程力学研究所,哈尔滨150080

出　　处：《黑龙江科技学院学报》2013年第6期581-584,共4页Journal of Heilongjiang Institute of Science and Technology

基　　金：黑龙江省教育厅科学技术研究项目(12513084)

摘　　要：为分析大跨悬索空间结构的动力反应,在两节点悬链线索单元的基础上,在大跨悬索结构中的索单元中引入压弯变形研究索径增大所引起的影响。提出了空间索单元模型,并利用Hamilton变分原理推导了索单元的运动方程,通过伪静力方法进行求解。以单索和张拉悬索屋盖为算例,验证了单元分析模型在分析大跨、大直径悬索结构动力性能方面的可靠性与实用性。结果表明,空间的索动力反应分析模型,可以对跨度和自重较大的预应力悬索结构的动力响应快速准确的预测,为实际工程在初期设计时提供实用参考。Aimed at an analysis of dynamic response of spatial structure suspension cable of longer span, this paper, relying on two node eatenary cable element and considering the influence of the in- creasing cable diameter by introducing bending deformation into cable structure unit of larger span, pro- poses a modified spatial catenary cable element, and offers dynamical response equations derived with help of Hamilton variational principle and solution found by pseudo-statical method. The analysis of the modal response of the tension cable roof proves that the model exhibits a greater reliability and practicality in analyzing the dynamic performance of cable structure with larger span and diameter. The results show that the model, capable of a quicker and more accurate prediction of dynamic response of prestressed ca- ble structure of greater weight and span, may provide a useful reference for earlier design of projects.

关 键 词：悬索结构 压弯变形 空间索单元模型 模态响应 

分 类 号：TU393.3[建筑科学—结构工程]