悬架穹顶结构预应力施工精度控制方法

IF 1.7 3区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Advanced Steel Construction Pub Date : 2014-01-01 DOI:10.18057/ijasc.2014.10.4.3

Liu Hongbo, Yang Ren-zhang, Han Qinghua, Zhao Bo, Wang Xiaodun, Chen Zhihua

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引用次数: 17

摘要

悬索-穹顶结构在预应力施工过程中，由于温度变化和环索与索杆节点间的滑动摩擦导致预应力偏离目标力较大。这种偏差不仅会引起构件应力和节点位移的显著增加，而且会降低悬索-穹顶结构的承载能力。为减小预应力偏差，提出了充分设置预应力点、超预应力施工、采用滚动索杆节点、随温度变化修改预应力控制值等施工措施。为明确上述施工措施，设计了直径10.8 m的悬挂穹顶试件。在此基础上设计并实施了6种方案。然后进行有限元分析。试验和数值结果表明，本文提出的施工措施能有效地减小预应力偏差。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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PRECISION CONTROL METHOD FOR PRE-STRESSING CONSTRUCTION OF SUSPEN-DOME STRUCTURES

A significant pre-stressing deviation from the pre-stressing target force is induced by the temperature change and sliding friction between hoop cables and cable-strut joints during the pre-stressing construction of suspen-dome structures. The deviation not only induces a considerable increase in member stress and nodal displacement but also reduces the load-bearing capacity of suspen-dome structures. To reduce this pre-stressing deviation, construction measures such as the use of a sufficient number of pre-stressing points, over pre-stressing construction, adoption of rolling cable-strut joints, and modification of the pre-stressing control value with temperature change were developed. A suspen-dome specimen with a diameter of 10.8 m was designed to clarify the aforementioned construction measures. Six schemes were designed and implemented based on this specimen. Finite element analysis was then conducted. Experimental and numerical results indicated that the construction measures presented in this paper could effectively reduce pre-stressing force deviation.

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来源期刊

Advanced Steel Construction CONSTRUCTION & BUILDING TECHNOLOGY-ENGINEERING, CIVIL

CiteScore

2.60

自引率

29.40%

发文量

审稿时长

6 months

期刊介绍： The International Journal of Advanced Steel Construction provides a platform for the publication and rapid dissemination of original and up-to-date research and technological developments in steel construction, design and analysis. Scope of research papers published in this journal includes but is not limited to theoretical and experimental research on elements, assemblages, systems, material, design philosophy and codification, standards, fabrication, projects of innovative nature and computer techniques. The journal is specifically tailored to channel the exchange of technological know-how between researchers and practitioners. Contributions from all aspects related to the recent developments of advanced steel construction are welcome.