English：

The socket plate-type support has been widely adopted in the formwork system of constructionprojects. While extensive research has been conducted on the joint stiffness and structural configuration ofsocket plate-type support, there remains a lack of studies focusing on the overall mechanical performanceof the plate-type support under varying erection conditions. This paper addresses this gap by investigatingkey factors such as the spacing of the vertical standards, cantilever height （a value）， formwork height,and materials used for primary and secondary keels. A total of 40 group schemes are established,including configurations with purely support structures without primary and secondary keels, as well asthose incorporating beam-supported formwork. Using finite element software ANSYS, the study conductsa comparative analysis of the influence of these factors on the overall mechanical performance of the plate-type support. The analysis results show that the cantilever height has the most significant impact on theultimate load-bearing capacity of a single vertical standard,with the load-bearing capacityvarying by afactor of two times between the maximum and minimum limits specified in the standards. Additionally,the spacing of the vertical standards has the greatest effect on the mid-span deflection of the secondarykeels,with higher bending strength keels allowing the plate-type support system to fully utilize itsmechanical performance. Based on theoretical calculations, this paper provides a reference table forsupport formwork in concrete slab construction,which is validated through practical application.