CALCULATION AND ANALYSIS OF CREEP MULTIPLIER OF COMPOSITE BEAMS IN EUROCODE 4

PENG Zuqiang; CHEN Xu; MAO Dejun; YU Wenzheng; WU Kechuan

doi:10.13204/j.gyjz202004025

Volume 50 Issue 4

Jun. 2020

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PENG Zuqiang, CHEN Xu, MAO Dejun, YU Wenzheng, WU Kechuan. CALCULATION AND ANALYSIS OF CREEP MULTIPLIER OF COMPOSITE BEAMS IN EUROCODE 4[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(4): 145-150. doi: 10.13204/j.gyjz202004025

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CALCULATION AND ANALYSIS OF CREEP MULTIPLIER OF COMPOSITE BEAMS IN EUROCODE 4

doi: 10.13204/j.gyjz202004025

1. School of Urban and Rural Construction and Engineering Management, Kunming University, Kunming 650214, China;
2. Infrastructure Department, Kunming University, Kunming 650214, China

Received Date: 2019-10-19

Abstract

Abstract

In Eurocode 4, adverse effects of creep are expressed as the reduction factor of concrete elastic modulus, which is the function of time including a constant creep multiplier and creep coefficient. However, the constant creep multiplier can not reflect important factors such as the beam height, it is necessary to derive analytical formula as a supplement. Based on Dischinger creep differential constitutive equation, formulas of axial creep multiplier and bending creep multiplier were derived after a reasonable simplification, which could be used to transform the area and moment of inertia of concrete into those of the equivalent steel respectively. Through the computer solution of differential equations, the two formulas were verified. Parameter analysis was carried out on the beam height, the results showed that reduction factor in Eurocode 4 was recommended for the conformity with the time-dependent law of composite beams, but it underestimated the adverse impact and the errors increased with the increased of steel beam height.
- steel-concrete composite beam,
- axial creep multipier,
- bending creep multipier,
- stress,
- deflection

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References(11)

References

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