Experimental Research and Analysis on Encased Steel Box Concrete Beams

A encased steel box concrete beam (ESBCB) is light because it is hollow. In order to investigate the mechanical behavior of ESBCBs, 5 simple ESBCBs and 4 continuous ESBCBs have been tested. The test results reported include distribution of cracks, deformation, failure characteristics, strength and u...

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Bibliographic Details
Published inAdvances in structural engineering Vol. 12; no. 2; pp. 211 - 230
Main Authors Zheng, Wen-Zhong, Xie, Heng-Yan
Format Journal Article
LanguageEnglish
Published London, England SAGE Publications 01.04.2009
Subjects
concrete beam with encased steel box (ESBCB)
moment modification
crack width
length of equivalent plastic hinge
stiffness
bending capacity
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Summary:A encased steel box concrete beam (ESBCB) is light because it is hollow. In order to investigate the mechanical behavior of ESBCBs, 5 simple ESBCBs and 4 continuous ESBCBs have been tested. The test results reported include distribution of cracks, deformation, failure characteristics, strength and ultimate load. That the bending capacity of this kind of beam can be calculated in accordance with the plane section assumption was verified, and the formula for calculating crack width and stiffness are given. The formula for calculating the length of an equivalent plastic hinge for continuous ESBCBs is presented. A design method for moment modification is put forward, in which, the difference between the elastic calculated moment of critical section at the intermediate support and the moment subjected by the steel box is modified, and in the calculation formula, the variable is the relative plastic rotation.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1369-4332
2048-4011
DOI:10.1260/136943309788251669