冻融后 L 形型钢混凝土柱轴压试验与模拟

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中图分类号：TU398献标识码：A

Abstract： In order to investigate the influence of freeze-thaw cycles on the mechanical performance of steel-reinforced concrete （ SRC） irregular-shaped column structures， based on the axial compression tests of five L-shaped SRC columns after freeze-thaw and the simulation study of 14L -shaped SRC columns， the parameters including concrete strength， reinforcement ratio and steel content were analyzed. According to the results， the calculation formula for the post-freeze-thaw bearing capacity was established. The research results show that the freeze-thaw cycles have a significant impact on the durability and structural performance of SRC components， manifested as the damage of the components gradually deepening from the inside to the outside， and the ultimate axial compression bearing capacity decreases significantly after 50 freeze-thaw cycles. The calculation values of the bearing capacity formula proposed based on the finite element results have an error within 5% ， which can reflect the change of ultimate bearing capacity and provide a reference for the application of this structure in cold regions.

Key words： freeze-thaw cycle; steel-reinforced concrete; special-shaped column; ultimate bearing capacity; ABAQUS

采用型钢混凝 土 （ Steel Reinforced Concrete，SRC）异形柱取代钢筋混凝土矩形截面柱作为受力构件，不仅具有异形柱在建筑布局灵活性和空间利用率的优势，还拥有优秀的结构性能与施工效益[1-2]。（剩余8160字）