Advanced Steel Construction

Vol. 10, No. 4, pp. 404-425 (2014)


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

 

Hongbo Liu 1,2, Qinghua Han2, Zhihua Chen 1,2, Xiaodun Wang2,*, Ren-Zhang Yan2and Bo Zhao2

State Key Laboratory Of Hydraulic Engineering Simulation And Safety, Tianjin University, Tianjin 300072, China

Tianjin Key Laboratory of Civil Engineering Structure & New Materials, Tianjin University, Tianjin 300072, China

*(Corresponding author: E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.)

Received: 15 October 2012; Revised: 30 September 2013; Accepted: 19 December 2013

 

DOI:10.18057/IJASC.2014.10.4.3

 

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ABSTRACT

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.

 

KEYWORDS

Suspen-dome structures, Pre-stressing construction, Pre-stressing force deviation, Temperature change, sliding friction, Cable-strut joints, Experimental study, Numerical analysis


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