Research on Thermal Effect of Steel-concrete Bonding Section of Cable-stayed Bridge with Wide Hybrid Beam
Based on heat conduction theory and ABAQUS finite element numerical simulation,the tem-perature difference and temperature stress distribution characteristics of steel-concrete joint section of wide mixed beam cable-stayed bridge under the action of sunshine non-uniform temperature were ana-lyzed.The results show that the temperature transfer in the steel-concrete joint has a certain lag,and the temperature rise and fall of the top plate is obviously higher than that of the bottom plate.The transverse temperature difference in the transition section of steel beam is obvious at the cantilever,and the maximum variation range is 4.6℃.There is an obvious temperature gradient in the vertical di-rection of the diaphragm,and the maximum vertical temperature difference is about 14℃ at 18 o'clock in the transition section of the steel box girder.Under the action of temperature,the steel beam is generally compressed and partially tensioned,and the tensile stress is concentrated at the anchorage web,while the concrete beam is generally tensioned and partially compressed,and the compressive stress is concentrated in the middle of the cantilever section.
cable-stayed bridgewide hybrid beamsteel-concrete bonding sectiontemperature fieldtemperature test
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