In Situ Experimental Study on the Behavior of UHPC Composite Orthotropic Steel Bridge Deck

Su, Li; Wang, Shilei; Gao, Yan; Liu, Jianlei; Shao, Xudong

doi:10.3390/ma13010253

Cited by 13 publications

(2 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Under uniaxial tension, HDC exhibits multiple cracking characteristics and an ultimate tensile strain not less than 0.50%, with an average crack width not exceeding 200 μm, as shown in Figure 1 [ 1 ]. HDC has an excellent tensile deformation capacity under uniaxial tension and can be used in engineering applications with high flexural and tensile deformation requirements [ 2 , 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ambient Temperature on the Mechanical Properties of High Ductility Concrete

et al. 2023

View full text Add to dashboard Cite

This study analyzes the mechanical properties of high ductility concrete (HDC) under different ambient temperatures to provide a parameter basis for the design of HDC bridge deck link slabs. Five temperatures (−30, 0, 20, 40, and 60 °C) were designed to investigate the compressive, tensile, and flexural properties of HDC after temperature treatment and analyze the pore structure. The results show that, compared with the HDC performance at room temperature (20 °C), the compressive strength, ultimate tensile strength, and flexural strength decreased after treatment at low temperatures (−30 and 0 °C), while the strength increased after treatment at high temperatures (40 and 60 °C). After experiencing low- and high-temperature treatments, the ultimate tensile strain and ultimate deflection of the HDC increased. The tensile and flexural failures of the HDC exhibited multiple cracking, and the stress–strain/deflection curve showed a strain/deflection hardening stage. The tensile constitutive relationship can be simplified as a bilinear two-stage relationship. As the temperature increased, the porosity of harmless and less harmful pores in HDC gradually increased, while the porosity of harmful and more harmful pores gradually decreased, resulting in an increase in HDC strength. Based on the influence of temperature on HDC properties, design parameters for the HDC bridge deck link slab structure are proposed.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Ambient Temperature on the Mechanical Properties of High Ductility Concrete

et al. 2023

View full text Add to dashboard Cite

show abstract

“…In thin-walled structures such as bridge decks, due to the large surface area, the volume deformation caused by shrinkage and temperature is greater, and the cracking caused by the constraints of steel bars and bearings is also more serious. [ 1 , 2 ]. Early deformation cracks do not necessarily affect the safety of the structure immediately, but will seriously affect the durability of the bridge, so it is necessary to pay attention to the damage caused by cracks [ 3 , 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of MgO Expansive Agent and Steel Fiber on Crack Resistance of a Bridge Deck

Jiang

Deng

et al. 2020

Materials

View full text Add to dashboard Cite

To prevent cracks caused by shrinkage of the deck of the Xiaoqing River Bridge, MgO concrete (MC) and steel fiber reinforced MgO concrete (SMC) were used. The deformation and strength of the deck were measured in the field, the resistance to chloride penetration of the concrete was measured in the laboratory, and the pore structure of the concrete was analyzed by a mercury intrusion porosimeter (MIP). The results showed that the expansion caused by the hydration of MgO could suppress the shrinkage of the bridge deck, and the deformation of the deck changed from −88.3 × 10−6 to 24.9 × 10−6, effectively preventing shrinkage cracks. At the same time, due to the restriction of the expansion of MgO by the steel bars, the expansion of the bridge deck in the later stage gradually stabilized, and no harmful expansion was produced. When steel fiber and MgO were used at the same time, the three-dimensional distribution of steel fiber further limited the expansion of MgO. The hydration expansion of MgO in confined space reduced the porosity of concrete, optimized the pore structure, and improved the strength and durability of concrete. The research on the performance of concrete in the in-situ test section showed that MgO and steel fiber were safe for the bridge deck, which not only solved the problem of shrinkage cracking of the bridge deck but also further improved the mechanical properties of the bridge deck.

show abstract

Corrosion of steel rebars across UHPC joint interface under chloride attack

Zhang

Wang

Zhang

et al. 2023

Construction and Building Materials

View full text Add to dashboard Cite

In Situ Experimental Study on the Behavior of UHPC Composite Orthotropic Steel Bridge Deck

Cited by 13 publications

References 20 publications

Effect of Ambient Temperature on the Mechanical Properties of High Ductility Concrete

Effect of Ambient Temperature on the Mechanical Properties of High Ductility Concrete

Effects of MgO Expansive Agent and Steel Fiber on Crack Resistance of a Bridge Deck

Corrosion of steel rebars across UHPC joint interface under chloride attack

Contact Info

Product

Resources

About