筒架与筒架交替支撑式液压爬升整体钢平台模架设计计算分析

Design Calculation and Analysis of Hydraulic-Climbing Integral Steel Design Steel Platform Formwork Alternately Supported by Tow Tubular Frames

筒架与筒架交替支撑式液压爬升整体钢平台模架装备,是为适应高层混凝土结构施工而研发的一套新型模架装备。该套模架装备的支撑系统由搁置筒架支撑与爬升筒架支撑组成,二者分别用于正常工作状态与爬升状态。以上海中心大厦核心筒混凝土结构建造为背景,对这种新型模架结构进行计算分析。针对上海中心核心筒结构建造中模架装备的2种典型体型,分别建立有限元计算模型,并在正常施工工况与爬升工况下分别进行计算。计算结果表明:这套模架装备在整个施工过程中均安全可靠。但为了确保模架装备的实际受力状态与计算假定一致,实际施工中还须采取一定的措施。最后,针对模架装备的关键支承节点进行了受力分析。

A new kind of self-climbing steel platform formwork equipment alternately supported by two tabular frames has been developed for the construction of high-rise concrete structures. Such formwork equipment support system consists of the laying tubular frame support and the climbing tubular frame support which are used in the normal working state and the climbing state respectively. Based on the construction of the core-tube in Shanghai Tower, this paper introduces the calculation analysis of the new formwork structure. Two typical configurations of the formwork equipment used in Shanghai Tower are considered, and two finite element models are established respectively. Furthermore, the structural calculation analysis is conducted in both the normal working case and the climbing case. The results show that the formwork system is safe and reliable during the construction. However, in order to ensure there is no difference between the actual state in the construction and the assumed state, some proper measures should be taken in the actual construction. Finally, the force analysis of some key supporting joints in the formwork equipment has been made.