Abstract
Prestressed concrete structures are used in various fields as they can reduce the cross-sectional area of members compared with reinforced concrete structures. In addition, the use of high-performance and strength concrete can help reduce weight and achieve excellent durability. Recently, structures have increasingly been constructed using high-performance and strength concrete, and therefore, structural verification is required. Thus, this study experimentally evaluated the structural performance of a long-span bridge deck slab joint, regarded as the weak point of structures. The specimens were designed with a 4 m span for application to cable-stayed bridges. To ensure the required load resistance and serviceability, the specimens comprised of 120 MPa high-performance fiber-reinforced concrete and were prestressed. The deck slabs satisfied all static and fatigue performance as well as serviceability requirements, although they were thinner than typical concrete bridge deck slabs. The study also verified whether the deck slabs were suitable to help implement precast segmental construction methods. Finally, the results confirmed that the structural performance of the developed prestressed concrete (PSC) deck slab was sufficient for the intended bridge application as it achieved a sufficiently large safety factor in the static and fatigue performance tests, relative to the design requirement.
Highlights
High-performance concrete improves the durability of structures by ensuring high quality, and enables weight reduction owing to its excellent structural performance
Obtained residual strength test is compared with the static specimens
That the joint the specimen is 19.2–24.8% of the limit of 0.2 mm for a prestressed concrete (PSC) member. These results indicate that the deck slabs tested in this study would exhibit no serviceability problems until 2 × 106 fatigue cycles indicate that the deck slabs tested in this study would exhibit no serviceability problems until
Summary
High-performance concrete improves the durability of structures by ensuring high quality, and enables weight reduction owing to its excellent structural performance. High-performance materials such as ultra-high-performance concrete, whose strength has been significantly increased compared with normal concrete, have been attracting attention as they help realize innovative performance improvements and light-weight structures [1,2]. Continuous efforts have been invested to improve the quality and structural performance of these slabs by utilizing high-performance materials. Many research and construction examples that utilize a precast method for accelerated bridge construction can be found in the literature [3]. The precast deck should be assembled with several prefabricated panels to complete the deck members; there is a risk of lack of continuity. Several studies have been conducted on Materials 2019, 12, 3040; doi:10.3390/ma12183040 www.mdpi.com/journal/materials
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