Experimental Study and Numerical Analysis of Hybrid Fiber Reinforced Self-Compacting Concrete Segments at High Temperatures

LUO Bin; WANG Huan; BAI Lianwei; REN Zhaoqing; WANG Shanshan

doi:10.3724/j.gyjzG23071115

Volume 54 Issue 5

May 2024

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LUO Bin, WANG Huan, BAI Lianwei, REN Zhaoqing, WANG Shanshan. Experimental Study and Numerical Analysis of Hybrid Fiber Reinforced Self-Compacting Concrete Segments at High Temperatures[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(5): 226-237. doi: 10.3724/j.gyjzG23071115

Citation:

LUO Bin, WANG Huan, BAI Lianwei, REN Zhaoqing, WANG Shanshan. Experimental Study and Numerical Analysis of Hybrid Fiber Reinforced Self-Compacting Concrete Segments at High Temperatures[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(5): 226-237. doi: 10.3724/j.gyjzG23071115

Citation:

LUO Bin, WANG Huan, BAI Lianwei, REN Zhaoqing, WANG Shanshan. Experimental Study and Numerical Analysis of Hybrid Fiber Reinforced Self-Compacting Concrete Segments at High Temperatures[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(5): 226-237. doi: 10.3724/j.gyjzG23071115

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Experimental Study and Numerical Analysis of Hybrid Fiber Reinforced Self-Compacting Concrete Segments at High Temperatures

doi: 10.3724/j.gyjzG23071115

1. China Communications Third Highway Engineering Co., Ltd., Xuzhou 221008, China;
2. State Key Laboratory of Intelligent Construction and Health Operation & Maintenance of Deep Underground Engineering, China University of Mining & Technology, Xuzhou 221008, China

Received Date: 2023-07-11
Available Online: 2024-06-22

Abstract

Abstract

To study the preloading on the mechanical properties of hybrid fiber self-compacting concrete segments at high-temperatures, high-temperature tests were conducted on five segments to obtain the segment furnace temperature, concrete temperature, deformation, and failure mode. A calculation subroutine was developed based on ABAQUS software to establish a temperature field and mechanical analysis model for hybrid reinforced fiber self-compacting concrete segments. The appropriate constitutive relations during the different stages were selected, and the influence of explict or implicit transient thermal strain and preload on segment displacement and equivalent plastic tensile strain was analyzed. The results showed that as the preload increased, the number of cracks on the side of the segment increased and the length became smaller, the number of cracks on the outer arc surface decreased, the distribution of cracks on the inner arc surface became more uniform, and the addition of fibers was helpful to reduce the average crack spacing and the high temperature damage of concrete at the arch foot of segment. The transient thermal strain had an important influence on the equivalent plastic tensile strain distribution of the segment during the cooling stage. When the explicit transient thermal strain was used, the equivalent plastic tensile strain distribution of the segment was more consistent with the test crack area.
- tunnel segments,
- hybrid fibers,
- high temperature test,
- preloading,
- transient thermal strain

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References(30)

References

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