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为了研究核电工程涉及的超大厚度钢板混凝土组合墙体的整体性能及钢板的屈曲规律,基于3个不同的钢板弹性屈曲理论分析设计和实施了4个钢板混凝土组合墙轴压试验模型,试验中主要考虑距厚比参数的不同.分析了构件的破坏过程、荷载-位移曲线、钢板的荷载-屈曲曲线.分析结果表明:钢板的屈曲或屈服对试件整体刚度影响不明显;合理的栓钉布设能有效地保证钢板和混凝土协同工作,随着栓钉布设的距厚比变小钢板的屈曲应变和应力有所增大.在试验分析基础上,导出了组合墙体的初始刚度和极限承载力的经验公式,给出了适合组合墙体钢板弹性屈曲应变计算的理论公式.
In order to study the overall performance of the large-thickness concrete slab wall and the buckling of the steel plate in the nuclear power project, four axial compression test models of the steel-concrete composite wall were designed and implemented based on three different elastic buckling theory of steel plate. The failure process, the load-displacement curve and the load-buckling curve of the steel plate are analyzed. The analysis results show that the buckling or yielding of the steel plate has no obvious effect on the overall rigidity of the test piece. Which can effectively ensure the co-operation of steel plate and concrete.The buckling strain and stress of steel plate increase with the increase of the ratio of the thickness of the bolt to the thickness of the steel plate.According to the experimental analysis, the initial stiffness and ultimate bearing capacity The empirical formula is given, which is fit for the theoretical formula of elastic buckling strain calculation of wall steel plate.