This study investigated the ultimate load capacity of assembled system supports by comparing cases with and without bracing members. Supports used as temporary structures are essential to resist the concrete casting load. Current trends encourage the use of system supports to prevent the collapse of supports, which occur frequently. Studies regarding the ultimate behavior of system supports in Korea are fewer than those in other countries. Existing studies have only focused on the behavior of unit members, such as vertical members. However, studies that focused on unit vertical members under axial loading reported difficulty in predicting the ultimate behavior of assembled system supports. Furthermore, the ultimate strength of the system support can be decreased significantly in cases without a bracing member, which occur frequently at actual sites. Therefore, the ultimate behavior of the system support considering actual construction site conditions was investigated through experimental tests, focusing on whether bracing members were installed. Experimental results showed that the load-carrying capacity of a three-story system support without a bracing member was 38.4% that of the system support with full bracing members. In addition, the load-carrying capacity of the three-story system support without bracing members decreased by 41.2% compared with that of a two-story system support without bracing members. This indicates that the installation of bracing members is essential for increasing the ultimate load capacity of system supports, and the number of stories of system supports should be considered to determine their ultimate strength.

这项研究通过比较带支撑构件和不带支撑构件的箱体，研究了组装系统支架的极限承载能力。用作临时结构的支撑对于抵抗混凝土浇筑载荷至关重要。当前的趋势鼓励使用系统支撑件以防止频繁发生的支撑件崩溃。在韩国，有关系统支持的最终行为的研究少于其他国家。现有研究仅关注单位成员（例如垂直成员）的行为。但是，针对轴向载荷下的单元垂直构件的研究表明，很难预测组装好的系统支架的最终性能。此外，在没有支撑构件的情况下，系统支撑的极限强度会大大降低，在实际站点中经常发生。因此，通过实验测试研究了考虑实际施工现场条件的系统支架的最终性能，重点是是否安装了支撑构件。实验结果表明，没有支撑构件的三层系统支撑的承载能力是具有完整支撑构件的系统支撑的承载能力的38.4％。另外，与没有支撑部件的两层系统支撑相比，没有支撑部件的三层系统支撑降低了41.2％。这表明安装支撑构件对于增加系统支架的极限承载能力至关重要，因此应考虑系统支架的层数来确定其极限强度。通过实验测试研究了考虑实际施工现场条件的系统支撑的最终行为，重点是是否安装了支撑构件。实验结果表明，没有支撑构件的三层系统支撑的承载能力是具有完整支撑构件的系统支撑的承载能力的38.4％。另外，与没有支撑部件的两层系统支撑相比，没有支撑部件的三层系统支撑降低了41.2％。这表明安装支撑构件对于增加系统支架的极限承载能力至关重要，因此应考虑系统支架的层数来确定其极限强度。通过实验测试研究了考虑实际施工现场条件的系统支撑的最终行为，重点是是否安装了支撑构件。实验结果表明，没有支撑构件的三层系统支撑的承载能力是具有完整支撑构件的系统支撑的承载能力的38.4％。另外，与没有支撑部件的两层系统支撑相比，没有支撑部件的三层系统支撑降低了41.2％。这表明安装支撑构件对于增加系统支架的极限承载能力至关重要，因此应考虑系统支架的层数来确定其极限强度。