A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Fatigue behavior of orthotropic composite bridge decks without cutout at rib-to-floorbeam intersection
Abstract The composite bridge panel consisting of an orthotropic steel deck with no extended cutout at the rib-to-floorbeam (RF) intersection and an ultra-high performance concrete (UHPC) rigid layer was proposed, which can simplify the manufacture process and enhance economic benefit. Refined finite element models were established to analyze the stress response of fatigue-prone details, and the approach of variable thickness rib was proposed to achieve an infinite fatigue life. The effect of critical geometric parameters on fatigue performance of RF joint was further investigated, and the parameter combinations with infinite fatigue life were determined. The results show that the rib-to-deck (RD) joint indicates infinite fatigue life, and the stiffness of panel meets the requirements of specification. There is a significant stress raiser at RF joint, and Dong's structural stress reveals that the surface stress at rib side is dominated by bending stress. The effects of the thicknesses of UHPC layer and deck plate on the stress are not significant. Increasing the thickness of the rib belly as well as decreasing the floorbeam thickness and spacing can reduce the stress range of rib side at RF joint, and the 10 mm thick floorbeam is preferable. The UHPC layer can be 50 mm if the rib with variable thickness is utilized, while the UHPC is required to be 60 mm and the floorbeam spacing is 2.5 m if the rib with uniform thickness is adopted.
Highlights A non-cutout orthotropic steel-UHPC composite bridge deck was proposed. Refined FEA was conducted to assess the fatigue performance, which was further verified by the stress behavior of the model testing. The variable thickness rib was proposed to achieve an infinite fatigue life. Dong's structural stress reveals that the surface stress at rib side of RF joint is dominated by bending stress. Critical geometric parameters were discussed to achieve an infinite fatigue life.
Fatigue behavior of orthotropic composite bridge decks without cutout at rib-to-floorbeam intersection
Abstract The composite bridge panel consisting of an orthotropic steel deck with no extended cutout at the rib-to-floorbeam (RF) intersection and an ultra-high performance concrete (UHPC) rigid layer was proposed, which can simplify the manufacture process and enhance economic benefit. Refined finite element models were established to analyze the stress response of fatigue-prone details, and the approach of variable thickness rib was proposed to achieve an infinite fatigue life. The effect of critical geometric parameters on fatigue performance of RF joint was further investigated, and the parameter combinations with infinite fatigue life were determined. The results show that the rib-to-deck (RD) joint indicates infinite fatigue life, and the stiffness of panel meets the requirements of specification. There is a significant stress raiser at RF joint, and Dong's structural stress reveals that the surface stress at rib side is dominated by bending stress. The effects of the thicknesses of UHPC layer and deck plate on the stress are not significant. Increasing the thickness of the rib belly as well as decreasing the floorbeam thickness and spacing can reduce the stress range of rib side at RF joint, and the 10 mm thick floorbeam is preferable. The UHPC layer can be 50 mm if the rib with variable thickness is utilized, while the UHPC is required to be 60 mm and the floorbeam spacing is 2.5 m if the rib with uniform thickness is adopted.
Highlights A non-cutout orthotropic steel-UHPC composite bridge deck was proposed. Refined FEA was conducted to assess the fatigue performance, which was further verified by the stress behavior of the model testing. The variable thickness rib was proposed to achieve an infinite fatigue life. Dong's structural stress reveals that the surface stress at rib side of RF joint is dominated by bending stress. Critical geometric parameters were discussed to achieve an infinite fatigue life.
Fatigue behavior of orthotropic composite bridge decks without cutout at rib-to-floorbeam intersection
Xiang, Ze (author) / Zhu, Zhiwen (author)
2022-09-29
Article (Journal)
Electronic Resource
English
Parametric study of floorbeam cutouts for orthotropic bridge decks to determine shape factors
| Online Contents | 2009