Development of a New Road Bridge Deck Joint Method to Improve Quality and Productivity
By T. Nozawa, T. Harigai, T. Katsumi and J. Suyama
Concrete Journal, Vol.63, No.11, Nov. 2025
- Synopsis
- This paper presents the development of a new precast bridge deck joint method aimed at improving joint quality and work productivity. The method combines a mechanical anchorage system that employs nut-shaped anchoring hardware with high-strength fiber-reinforced mortar used as the joint filling material. Pullout tests on simulated joints and bending fatigue tests on beams incorporating joints were conducted to assess the effects of rebar spacing, splice lap length, and the presence or absence of shear reinforcement on flexural capacity. Further, a wheel load running test conforming to the NEXCO 442 test standard was performed to evaluate fatigue durability. The results confirmed that the joint has fatigue durability exceeding a service life of 100 years.
- Keywords:
- Deck joint, Mechanical anchorage method, Very high strength fiber-reinforced cementitious composite, PVA, Wheel load running test, Fatigue durability
