Steel–concrete–steel composite structures with bidirectional thin-walled webs (SCSBWs) are used to build large-scale structures. The presence of steel webs causes notable differences in shear behavior compared to other types of steel–concrete–steel (SCS) composite structures. In this paper, the shear–slip behavior of SCSBWs is studied through experiments and numerical simulations. Particularly, the numerical simulations cover a wide range of variations in the structural parameters to explore the effect of each parameter on the shear–slip behavior. A theoretical model to describe shear–slip​ in SCSBWs is proposed chiefly by introducing a slip reduction factor. The experimental and numerical data verified the proposed model, which also demonstrated acceptable accuracy and efficiency.

具有双向薄壁腹板（SCSBW）的钢-混凝土-钢复合结构用于建造大型结构。与其他类型的钢-混凝土-钢（SCS）复合结构相比，钢腹板的存在会导致剪切性能出现显着差异。在本文中，通过实验和数值模拟研究了SCSBW的剪切滑移特性。特别是，数值模拟涵盖了结构参数的广泛变化，以探索每个参数对剪切滑移行为的影响。主要通过引入滑移减少因子，提出了一种描述SCSBWs中剪切滑移的理论模型。实验和数值数据验证了所提出的模型，该模型也证明了可接受的准确性和效率。