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Study on the Main Parameters that Influencing the Actions of Shrinkage and Creep in the Widened Hollow Slab Bridges

 Study on the Main Parameters that Influencing the Actions of Shrinkage and Creep in the Widened Hollow Slab Bridges
Autor(en): , ,
Beitrag für IABSE Congress: Challenges in Design and Construction of an Innovative and Sustainable Built Environment, Stockholm, Sweden, 21-23 September 2016, veröffentlicht in , S. 1246-1253
DOI: 10.2749/stockholm.2016.1241
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For the highway bridges to be widened, it is important to find out the effect of new section on the old section. The paper is to study the effect of concrete creep and shrinkage of the new section ...
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Bibliografische Angaben

Autor(en): (China Merchants Chongqing Communications Technology Research & Design Institute Co., Ltd., Nan ’an, Chongqing, PRC)
(China Merchants Chongqing Communications Technology Research & Design Institute Co., Ltd., Nan ’an, Chongqing, PRC)
(Yunnan highway science & Technology Research Institute, Kunming, Yunnan, China)
Medium: Tagungsbeitrag
Sprache(n): Englisch
Tagung: IABSE Congress: Challenges in Design and Construction of an Innovative and Sustainable Built Environment, Stockholm, Sweden, 21-23 September 2016
Veröffentlicht in:
Seite(n): 1246-1253 Anzahl der Seiten (im PDF): 8
Seite(n): 1246-1253
Anzahl der Seiten (im PDF): 8
Jahr: 2016
DOI: 10.2749/stockholm.2016.1241
Abstrakt:

For the highway bridges to be widened, it is important to find out the effect of new section on the old section. The paper is to study the effect of concrete creep and shrinkage of the new section of widened hollow slab bridges. The analytic method to analyse the effect is put forward, the change of the elastic modulus with concrete age is considered in it; a program is complied with MATLAB for analysis accordingly. Then six parameters which may have effect on deflection and stress of widened bridges are studied. The parameters includes the concrete age of the new hollow slabs when splicing with the old ones, height of the new hollow slabs, width of the new part, concrete strength of the new hollow slabs, environment relative humidity, prestressing and width of the concrete splice plate. A 20 m long hollow slab bridge is analysed by the program. Studies present parameters which have more effect on the superstructure.

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