Abstract
The application of fiber-reinforced polymer (FRP) bars and ultra-high performance concrete (UHPC) in the field of civil engineering is promising. An innovative FRP bar-reinforced UHPC short-ribbed bridge deck slab, with low self-weight and high structural performance, was proposed in this study. The behavior of one-way basalt FRP (BFRP) bar-reinforced UHPC slabs under concentrated load was experimentally investigated, and compared with that of a steel bar-reinforced UHPC slab. The ultimate capacity of the one-way BFRP bar-reinforced UHPC slab was 0.59 times that of the steel bar-reinforced UHPC slab, while its ductility was better. Increasing the reinforcement ratio and loading area was beneficial to the ductility of one-way BFRP bar-reinforced UHPC slabs. Moreover, the model proposed by EI-Gamal et al. was found to be suitable for evaluating the punching shear capacities of one-way BFRP bar-reinforced UHPC slabs. However, the model failed to consider the unique strain-hardening characteristics of UHPC, which led to conservative prediction.
Highlights
For steel bar-reinforced concrete structures exposed to harsh environments, the corrosion of steel bars can lead to serious deterioration in structural performance and necessitate expensive rehabilitation
In all one-way ultra-high performance concrete (UHPC) slabs, the supported sides of the slab were slightly tilted upward, and one or two main cracks parallel to the support were the tests on two-way slabs under concentrated load, Matthys and Taerwe [28] pointed out a observed
Punching shear failure is close to flexural failure, especially for Fiber-reinforced polymer (FRP) bar-reinforced normal concrete (NC) slabs with low reinforcement ratios
Summary
For steel bar-reinforced concrete structures exposed to harsh environments, the corrosion of steel bars can lead to serious deterioration in structural performance and necessitate expensive rehabilitation. Fiber-reinforced polymer (FRP) bars possess numerous outstanding properties, such as their light-weight, high-strength, noncorrosive nature, and their magnetic transparency [1] They have been used to replace steel bars in concrete members. 1/7–1/5 times that of steel, the self-weight of the FRP bar-reinforced UHPC deck is lower than that of a steel bar-reinforced one, and the cost of labor bar-reinforced deck is lower than that of a steel bar-reinforced one, and the cost of labor would be reduced during the construction. For bridges such as long-span cable-stayed bridges and would be reduced the construction. FRP bars canthe help reduce the deadweight of the bridge deck the bridge span.bridge
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