This study aimed at developing desirable column cross-sections that are part of mid- and high-rise steel-precast concrete hybrid module buildings. Column cross-sections comprising existing modular frames are mostly steel hollow structural sections. These closed column cross-sections make the assembly process more difficult, leading to reduced constructability, and are costly because of the necessity for fireproofing treatment. In the present study, to overcome these limitations, an asymmetric open cross-section was produced by bending a steel plate, and part of it was filled with concrete. For the evaluation of the structural performance of the developed design, a total of nine specimens of asymmetric open cross-sections were experimented. The test variables were the length of the columns and eccentricity of the load. It was found that the strength decreased as the length of the column increased, and the eccentricity decreased the strength by about 45% compared to the case of central load.

本研究旨在开发理想的柱横截面，作为中高层钢预制混凝土混合模块建筑的一部分。现有组合框架的柱截面多为钢空心结构型材。这些封闭的柱横截面使得组装过程更加困难，导致可施工性降低，并且由于需要防火处理而成本高昂。在本研究中，为了克服这些限制，通过弯曲钢板产生不对称的开放横截面，并部分填充混凝土。为了评估所开发设计的结构性能，总共对九个不对称开放横截面的样本进行了实验。测试变量是柱的长度和负载的偏心率。