摘要
点支式玻璃建筑单层索网体系是一种新型的柔性支承结构体系,其受力特性在很大程度上依赖于所施加的预应力。该文对新保利大厦二期幕墙工程的单层索网结构模型的动力特性进行试验研究,提取了索网在分级预应力下的前三阶频率,并与加玻璃后的情况进行了对比分析。试验结果表明,结构的低阶频率与预应力的关系基本为近似线性关系,而高阶的非线性程度更明显,玻璃对结构的刚度有较大提高,试验与有限元计算结果比较吻合。
The monolayer cable net system for dot point glass facades is a new flexible supporting system. The system performance under load strongly depends on the pretension in the cables. The dynamic characteristics of a monolayer cable net were analyzed for glass facalde in the New Beijing Poly Plaza. The first three vibration frequencies were measured for each grading pretension and compared with the natural frequencies of structure installed with glass. The experimental results show that the higher frequencies of the net increase nonlinearly with increasing pretension in the net and increase faster than the lower frequencies. The tests also show that the glass greatly enhances the structural stiffness. The results agree well with finite element predictions.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第3期318-321,326,共5页
Journal of Tsinghua University(Science and Technology)
关键词
点支式玻璃建筑
单层索网
动力特性
玻璃
dot point glass facade, monolayer cable net
dynamiccharacteristics, glaze
