弦支穹顶结构施工模拟研究

CONSTRUCTION SIMULATION OF SUSPENED-DOME STRUCTURES

弦支穹顶是由上部单层网壳和下部张拉索杆体系组合而成的一种新型杂交空间结构,具有非常广阔的应用前景。在介绍弦支穹顶结构施工分析研究现状的同时,指出施工全过程分析中的关键问题是结构模型的几何确定和施加预应力的控制,并对模型试验进行研究,根据张拉单元、同时张拉点数、预应力施加水平等具体情况提出了2种张拉方案,并对理论值和实测值进行了对比。此研究可为弦支穹顶工程的施工提供参考。

Suspened-dome structure is a new kind of hybrid space structure with the combination of an upper singlelayer lattice shell and a lower cable-strut system, and has a very broad applied prospect. The research state of construction analysis is first introduced. The key problems in construction analysis are then pointed out, including determination of the geometric model and control of the prestressing force. Followed that, experiment of the scaled model is carried out and two construction schemes are proposed according to the pretension element, number of simultaneously pretension point and prestressing force level. The theoretical results are compared with that obtained form the experiment. The research here will provide a reference for construction of similar suspened-dome structures.