Mechanical Characteristic Analysis of Corrugated Steel Webs Using Asynchronous Construction Technology
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pISSN 1226-7988, eISSN 1976-3808 www.springer.com/12205
DOI 10.1007/s12205-020-0069-3
Structural Engineering
Mechanical Characteristic Analysis of Corrugated Steel Webs Using Asynchronous Construction Technology Da Wang
a
, Lei Wang
a
, and Cheng Tang
a
a
College of Civil Engineering and Architecture, Changsha University of Science & Technology, Changsha 410114 China
ARTICLE HISTORY
ABSTRACT
Received 13 January 2020 Revised 19 July 2020 Accepted 6 September 2020 Published Online 11 November 2020
For application and populization of the corrugated steel web PC composite box-girder bridge, a new asynchronous cantilever construction method was proposed to reflect the social and economic benefits of this type bridge in short term. In this paper, comparisons of the construction process and economic indexes between the traditional hanging basket cantilever construction method and the asynchronous cantilever method. Combination of the large finite element program ANSYS, a fine finite element model of the studied bridge was built, some analysis of the bridge structure were conducted for the whole process of construction, the calculation results were compared with the field testing data by the real-time monitored stress and displacement. The results indicated that the process of asynchronous cantilever construction method is simple and clear, the construction period is short and the economic indicator is high. This proposed asynchronous cantilever construction method is far superior to the traditional hanging basket cantilever construction method. The deformation and stress of structure were varied in a reasonable and safety range during the construction for the proposed method. The structural stress distribution of the proposed method is more reasonable than that of the traditional hanging basket cantilever construction method.
KEYWORDS Bridge engineering PC composite box girder Corrugated steel web Finite element method Stress
1. Introduction Steel–concrete composite bridges have become popular because of their advantages brought about by the desirable properties of steel and concrete. In particular, prestressed concrete (PC) bridges with corrugated steelwebs have emerged as promising bridge forms. This structural form provides excellent structural efficiency, with concrete flanges primarily taking bending and with corrugated steel webs taking shear. This type of bridge has some remarkable advantages, such as lightweight steel webs, efficient prestressing on concrete, high shear buckling strength of steel webs, high ductility, and easy maintenance. In 1986, the first bridge of this type, the Cognac Bridge, was built in France (Ahmed, 2001). Its successful application and significant advantages over conventional PC bridges have prompted substantial research work and motivated some construction companies to adopt this new composite structure in various countries, including China, Germany, Japan, and the USA (Yuan et al., 2018; Jiang et al., 2020) In PC bridges with corrugated steel webs, light corrugatedsteel
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