正交异性钢⁃混组合桥面的轮载扩散效应

doi:10.13229/j.cnki.jdxbgxb20210197

Abstract

Abstract:

A theoretical model is proposed for the wheel-load diffusion to investigate the transmission mechanism of vertical loading on the steel-concrete composite bridge deck system under local wheel loads. An existed full-scale test model was referred and the corresponding finite element numerical simulation were also conducted to verify the presented model and analysis the key parameters. The results show that， rather than the traditional assumption of 45 degree diffusion effect， the pressure on the steel top plate of the composite deck under vehicle loads has a significant local effect along the transverse direction of U-rib， and the sharing law of the wheel load could be obtained from the 3-span beam simply supported by the webs of U-rib. The paramelric analysis shows that， the proposed theoretical model is conservative in the common value range of engineering parameter of orthotropic steel-concrete composite bridge deck， and it could be referred to the design of orthotropic composite bridge deck.

Key words: bridge engineering, orthotropic steel-concrete composite bridge deck, wheel load, diffusion angle, concrete overlay

CLC Number:

U443.3

Hua-wen YE,Zhi-chao DUAN,Ji-lin LIU,Yu ZHOU,Bing HAN. Wheel⁃load diffusion effect on orthotropic steel⁃concrete composite bridge deck[J].Journal of Jilin University(Engineering and Technology Edition), 2022, 52(8): 1808-1816.

Figures/Tables 12

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栓钉间距 /mm	中心加载/%		偏心加载/%		栓钉直径 /mm	中心加载/%		偏心加载/%
栓钉间距 /mm	δ₁	δ₂	δ₁	δ₂	栓钉直径 /mm	δ₁	δ₂	δ₁	δ₂
150	9.64	34.37	23.24	40.39	9	10.17	36.19	25.21	43.64
300	10.03	37.13	24.59	44.36	13	9.64	34.37	23.24	40.39
450	10.58	38.25	26.06	45.50	17	9.83	35.75	24.72	43.09
600	11.37	38.66	25.26	45.12	25	9.65	35.40	24.40	42.64

Wheel⁃load diffusion effect on orthotropic steel⁃concrete composite bridge deck

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