摘   要：利用Midas FEA有限元软件建立了单箱单室箱梁模型，分析了不同工况（施工阶段、成桥阶段）下顶板混凝土强度等级、顶板厚度、钢板的厚度、位置和构造形式对箱梁应力的影响。结果表明：在施工和成桥阶段，提高顶板混凝土强度等级对底板应力影响较小，对顶板剪力滞效应有一定影响；适当减小顶板厚度能降低成桥阶段的底板拉应力；内置钢板在减轻箱梁自重的同时，可在一定程度上提高底板压应力；内置分离式钢板箱梁成桥阶段的压应力略大于内置整体式钢板箱梁。 Abstract: A box girder model with single box and single chamber was established by using Midas FEA finite element software, and the influence of the strength grade of roof plate concrete, the thickness of roof plate, the thickness, position, and construction form of the steel plate on the stress of the box girder under different working conditions (construction and service phases) was analyzed. The results indicate that during the construction and service phases, increasing the strength grade of roof plate concrete has a relatively small impact on the stress of the bottom plate, and has a certain impact on the shear hysteresis effect of the roof plate. Appropriately reducing the thickness of roof plate can decrease the tensile stress on the bottom plate during the service phase. The built-in steel plate can reduce the weight of the box girder, and increase the compressive stress of the bottom plate to some extent. The compressive stress during the service phase of the built-in separated steel plate box girder is slightly greater than that of the built-in integral steel plate box girder.

谢忠,王连广,马前程.施工和成桥阶段预应力混凝土箱梁的受力性能有限元分析[J].混凝土与水泥制品,2025(5):43-48. XIE Z,WANG L G,MA Q C.Finite element analysis of stress performance of prestressed concrete box girder during construction and service phases[J].China Concrete and Cement Products,2025(5):43-48.

摘   要：研究了钢管厚度（3.5、4.5、5.5 mm）和钢骨厚度（0、4、6、8 mm）对T形钢管混凝土短柱（内置T形钢骨）轴压性能的影响。结果表明：内置钢骨有效提高了试件的承载力和抵抗变形能力；随着钢管厚度或钢骨厚度的增加，试件的套箍系数和配骨率均增大，混凝土柱的约束效应增强，试件所能承受的荷载随之增大。 Abstract: The influence of steel tubular thickness (3.5 mm, 4.5 mm, and 5.5 mm) and steel frame thickness (0 mm, 4 mm, 6 mm, and 8 mm) on the axial compression performance of T-shaped concrete filled steel tubular short columns with built-in T-shaped steel frame was studied. The results show that the built-in steel frame effectively improves the bearing capacity and deformation resistance of the specimens. As the thickness of the steel tubular or steel frame increases, the confinement coefficient and bone ratio of the specimen both increase, and the confinement effect of the concrete column is enhanced, resulting in an increase in the load that the specimen can bear.

史一江.T形钢骨-钢管混凝土短柱的轴压性能研究[J].混凝土与水泥制品,2025(5):49-52. SHI Y J.Study on axial compression performance of T-shaped steel frame- steel tubular reinforced concrete short columns[J].China Concrete and Cement Products,2025(5):49-52.