Creep Analysis Comparison of Circular Axially Compressed Concrete-filled Steel Tubular Members

HAN Bing, WANG Yuan-feng

China Journal of Highway and Transport ›› 2007, Vol. 20 ›› Issue (2) : 83-86.

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China Journal of Highway and Transport ›› 2007, Vol. 20 ›› Issue (2) : 83-86.

Creep Analysis Comparison of Circular Axially Compressed Concrete-filled Steel Tubular Members

  • HAN Bing, WANG Yuan-feng
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Abstract

Based on reviewing the state-of-art of the studies on creep of concrete-filled steel tubular (CFST) members, a model was built to calculate creep of circular axially compressed CFST members considering creep theory about the situation of concrete under multi-axial stresses. Elastic continuation and plastic flow theory and age adjusted effective modulus method of concrete creep were used for the creep analysis of the members separately. The creeps of circular axially compressed CFST members were calculated based on two theoretical methods, and the results were compared with the result calculated by regression equation obtained from tests. The difference of two theories was pointed out by comparison and analysis. Results show that elastic continuation and plastic flow theory has higher accuracy in the creep calculation of axially compressed CFST members.

Key words

bridge engineering / circular axially compressed concrete-filled steel tubular member / comparison analysis / creep model / elastic continuation and plastic flow theory / age adjusted effective modulus method / long-term load

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HAN Bing, WANG Yuan-feng. Creep Analysis Comparison of Circular Axially Compressed Concrete-filled Steel Tubular Members[J]. China Journal of Highway and Transport, 2007, 20(2): 83-86

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