摘要
索结构在大跨结构中得到了快速的发展.高精度的索单元对索结构分析的精度和效率起着至关重要的作用.悬链线元无疑是目前最精确的索单元.但由于其在形成刚度时需要索的无应力长度,目前文献中的方法都为迭代求解,影响了计算速度.本文提出了一种索原长的直接求解方法,避免了迭代求解.算例表明本方法速度快、精度高,具有很高的实用性.
Cable structures are widly applied into large span structures. The accuracy of the cable element will greatly affect the accuracy and efficiency of such structural analysis. Undoubtedly the catenary element is the most accurate cable element. However the original length of the cable should be provided when dealing with the stiffness of the catenary element and the iterate algorithms proposed in the published references to get the original length of the cable are really time consuming. The paper presents a simple approach to get the accurate original length of the prestressed cable. The numerical example shows that the approach is accurate and efficient
出处
《空间结构》
CSCD
2004年第4期16-18,63,共4页
Spatial Structures
基金
国家自然科学基金资助项目(50108010).
