The Experimental Investigation on Flexural Behavior of NC Slabs Strengthened by UHPC Overlays

ZHANG Wenlong; ZHANG Shufeng; WANG Lei; HUANG Junxing; KE Yuzhen; JIANG Haibo

doi:10.3724/j.gyjzG25052103

Volume 56 Issue 9

Sep. 2026

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ZHANG Wenlong, ZHANG Shufeng, WANG Lei, HUANG Junxing, KE Yuzhen, JIANG Haibo. The Experimental Investigation on Flexural Behavior of NC Slabs Strengthened by UHPC Overlays[J]. INDUSTRIAL CONSTRUCTION, 2026, 56(9): 221-229. doi: 10.3724/j.gyjzG25052103

Citation:

ZHANG Wenlong, ZHANG Shufeng, WANG Lei, HUANG Junxing, KE Yuzhen, JIANG Haibo. The Experimental Investigation on Flexural Behavior of NC Slabs Strengthened by UHPC Overlays[J]. INDUSTRIAL CONSTRUCTION, 2026, 56(9): 221-229. doi: 10.3724/j.gyjzG25052103

Citation:

ZHANG Wenlong, ZHANG Shufeng, WANG Lei, HUANG Junxing, KE Yuzhen, JIANG Haibo. The Experimental Investigation on Flexural Behavior of NC Slabs Strengthened by UHPC Overlays[J]. INDUSTRIAL CONSTRUCTION, 2026, 56(9): 221-229. doi: 10.3724/j.gyjzG25052103

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The Experimental Investigation on Flexural Behavior of NC Slabs Strengthened by UHPC Overlays

doi: 10.3724/j.gyjzG25052103

1. Guangzhou Communication Design Institute Co., Ltd., Guangzhou 511400, China;
2. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China

Received Date: 2025-05-21
Available Online: 2026-11-07

Abstract

Abstract

To deeply study the experimental investigation on flexural behavior of NC slabs strengthened by UHPC overlays， the four-point hogging flexural tests on six NC slabs strengthened by UHPC overlays and one unstrengthened NC slab were performed. The parameters adopted in the experiment included the steel fiber content in the UHPC layer， the presence or absence of rebar in the UHPC layer， and the connection between UHPC and NC. According to the test results， the cracking loads of the composite slabs and the characteristic loads of 0.2 mm crack width can be significantly enhanced by the additional UHPC overlays. The flexural capacities of those slabs can be effectively improved by the presence of rebar in UHPC overlays. The steel fiber content in the UHPC layer and disposition of UHPC-NC interfaces had slightly effects on the cracking resistances and ultimate flexural capacities. Steel fibers and steel rebars in UHPC thin layers can effectively inhibit crack width development. The numerical model of the UHPC thin-layer strengthened NC plate was established using finite element software， and the numerical analysis results were in good agreement with the test results.
- UHPC,
- four-point pure bending loading,
- reinforcement,
- mechanical connection,
- bridge deck

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References(21)

References

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