Spreadsheet for Flat slabs in eccentric punching shear: experimental database and analysis

Eccentric punching shear can occur in concrete slab-column connections when the connection is subjected to shear and unbalanced moments. Unbalanced moments occur in all floor slabs at the edge and corner columns. As such, this problem is of practical relevance. However, most punching experiments in the literature deal with concentric punching shear at internal columns. This paper presents a developed database of 128 experiments of flat slabs under eccentric punching shear, including a summary of the testing procedure of each reference and a description of the slab specimens. Additionally, a linear finite element analysis of all the specimens is included to determine the relevant sectional shear forces and moments. Finally, the ultimate shear stresses from the database experiments are compared to the shear capacities determined with ACI 318-19, Eurocode 2, and the Model Code 2010. The comparison shows that the Model Code 2010 is the most precise in the predictions with an average tested-to-predicted ratio of 0.82 and a coefficient of variation of 29.63%. It can be concluded that improvements to the current design methods for eccentric punching shear are necessary.当混凝土板柱节点受剪并承受不平衡弯矩时，易发生偏心冲切破坏。所有边缘柱与角柱所在的楼板均会产生不平衡弯矩，因此该问题具备显著的工程实际意义。然而现有文献中的多数冲切试验，均针对内柱的同心冲切工况展开。本文构建了一套包含128组无梁楼板偏心冲切试验的数据库，涵盖各参考文献的试验流程概述与板试件详细参数描述。此外，本文还对所有试件开展了线性有限元分析，以确定对应的截面剪力与弯矩。最后，本文将数据库试验得到的极限剪应力，与依据ACI 318-19、欧洲规范2 (Eurocode 2)以及模型规范2010 (Model Code 2010)计算得到的抗剪承载力进行对比。对比结果表明，模型规范2010的预测精度最高，其试验值与预测值的平均比值为0.82，变异系数为29.63%。综上可见，现行偏心冲切抗剪设计方法亟需优化完善。