ANALYSIS OF SHEAR CAPACITY OF UHPC GIRDERS BASED ON THE MCFT THEORY

MIAO Jianbao; TONG Hanyuan; XU Bing; LI Lifeng

doi:10.13204/j.gyjzG20052801

Volume 51 Issue 8

Nov. 2021

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MIAO Jianbao, TONG Hanyuan, XU Bing, LI Lifeng. ANALYSIS OF SHEAR CAPACITY OF UHPC GIRDERS BASED ON THE MCFT THEORY[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(8): 60-67,18. doi: 10.13204/j.gyjzG20052801

Citation:

MIAO Jianbao, TONG Hanyuan, XU Bing, LI Lifeng. ANALYSIS OF SHEAR CAPACITY OF UHPC GIRDERS BASED ON THE MCFT THEORY[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(8): 60-67,18. doi: 10.13204/j.gyjzG20052801

MIAO Jianbao, TONG Hanyuan, XU Bing, LI Lifeng. ANALYSIS OF SHEAR CAPACITY OF UHPC GIRDERS BASED ON THE MCFT THEORY[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(8): 60-67,18. doi: 10.13204/j.gyjzG20052801

Citation:

MIAO Jianbao, TONG Hanyuan, XU Bing, LI Lifeng. ANALYSIS OF SHEAR CAPACITY OF UHPC GIRDERS BASED ON THE MCFT THEORY[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(8): 60-67,18. doi: 10.13204/j.gyjzG20052801

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ANALYSIS OF SHEAR CAPACITY OF UHPC GIRDERS BASED ON THE MCFT THEORY

doi: 10.13204/j.gyjzG20052801

1. Xi'an Highway Research Institute, Xi'an 710065, China;
2. Hunan University, Changsha 410082, China

Received Date: 2020-05-28
Available Online: 2021-11-10
Publish Date: 2021-11-10

Abstract

Abstract

In order to study the shear behavior of ultra-high performance concrete beams, based on the MCFT theory, the bending moment effect was superimposed and the UHPC (ultra-high performance concrete) constitutive relation of this part was modified. The contribution of tensile strength of UHPC to its shear performance after cracking was considered. The cross-section analysis model of prestressed UHPC beam under the conmbined action of bending and shearing was established, and the calculation program was compiled. In order to verify the correctness of the model, the shear test of three prestressed UHPC beams with the shear-span ratio as the main factor was conducted. The failure mode, crack distribution characteristics and bearing capacity of the beams were obtained. After using this model to validate the experiment results of other literatures, the results showed that the contrast results were in good agreement and the coefficient of variation was small. Combined with the MCFT model and the test results of a large number of existing literatures, the shearing empirical formula of UHPC beam was proposed considering the influence of shear-span ratio, hooping ratio, prestress and UHPC strength. The calculated value well coincided with the test.
- ultra-high performance concrete,
- prestressed UHPC girder,
- shear strength,
- MCFT,
- experiment

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References(23)

References

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