• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 28 Issue 6
Dec.  2015
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Article Contents
ZHOU Donghua, HAN Chunxiu, YANG Tianyuan, YANG Yingen, WANG Yongshuang. Precise and Approximate Methods to Calculate Shrinkage and Creep Effects of Simply-Supported Composite Beam[J]. Journal of Southwest Jiaotong University, 2015, 28(6): 1018-1024. doi: 10.3969/j.issn.0258-2724.2015.06.007
Citation: ZHOU Donghua, HAN Chunxiu, YANG Tianyuan, YANG Yingen, WANG Yongshuang. Precise and Approximate Methods to Calculate Shrinkage and Creep Effects of Simply-Supported Composite Beam[J]. Journal of Southwest Jiaotong University, 2015, 28(6): 1018-1024. doi: 10.3969/j.issn.0258-2724.2015.06.007

Precise and Approximate Methods to Calculate Shrinkage and Creep Effects of Simply-Supported Composite Beam

doi: 10.3969/j.issn.0258-2724.2015.06.007
  • Received Date: 28 Oct 2014
  • Publish Date: 25 Dec 2015
  • To provide a simple and feasible calculation method, differential equations for composite beam with creep and shrinkage were derived and solved based on the Dischinger's method by using exact and approximate methods respectively. When the exact method is adopted, the coupled differential equations need to be solved, the solution is difficult to acquire and too complex to apply. When the approximate method is used, the effect of moment redistribution in concrete slab on axial strain is neglected, this makes the differential equations decoupled and easy for solving. The calculation results of the two methods have a good agreement in the case of the rigidity ratio of concrete slab to steel beam being smaller than 0.2, and the error is within 2%. The larger the rigidity of steel beam, the larger the creep restrain to concrete slab and the redistribution internal forces. Furthermore, a special creep stress zero point exists in the section of steel beam.

     

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