# Study on Bending Performance of Tightly Spliced Truss-Reinforced Plate-Honeycomb Flat Beam
## 1 Introduction
Honeycomb beams are treated with holes in the beam webs to enhance the efficiency of steel utilization in the load-bearing process and to reduce the amount of steel used for cost control purposes [9]. The failure mode of composite flat beams is influenced by the combination form, with significant differences in failure modes, and has higher bending stiffness, bending moment bearing capacity, and ductility bearing capacity [6]. In addition, the honeycomb holes in the web of the steel beam can be used to pass through the layout of various pipelines as well as the internal reinforcement of the floor slab, which is conducive to the combined application with concrete slabs. Related studies have shown that the main factors affecting the load bearing of honeycomb beams include the  
Figure 1: Section concrete T-combination beam. honeycomb cavity rate, the shape of the openings, and the width-to-thickness ratio of the slab [10; 11]. [PERSON] [12] investigated the variation of the critical load of local buckling of the web of I-beams with different hole-height ratios and number of holes, with and without transverse stiffening ribs and with and without web openings. On the basis of this, [PERSON] [13] supplemented to investigate the effects of parameters such as width-to-thickness ratio, opening shape, distance from the first opening to the end, hole size, and steel grade on the elastic and inelastic critical buckling stresses of honeycomb beams. [PERSON] [14] investigated the optimum diameter and opening spacing of components at different spans. [PERSON] [15] analyzed the effect of opening shape and expansion ratio on honeycomb beams by conducting four-point bending tests with octagonal hole honeycomb beams and studied the rise in the bearing capacity of honeycomb beams as the expansion ratio increased on the surface. [PERSON] [16] found that the moment bearing capacity of honeycomb beams with round holes increased by 20.78% and deflection decreased by 11.51% compared to honeycomb beams with hexagonal openings due to avoiding the stress concentration phenomenon at the corners. [PERSON] [17] investigated the flexural performance of hexagonal honeycomb beams using a combination of experimental and finite element methods, taking into account the effect of the location of the honeycomb hole openings. In addition, there are effects of beam length, section grade, and cross-section size on the buckling ultimate load and buckling mode of honeycomb steel beams [18; 19; 20]. [PERSON] [21] studied the influence of concrete strength on the load deflection, flexural bearing capacity, and ductility of high-speed steel-concrete composite beams. The simplified plastic method overestimated the ultimate flexural strength of high-speed steel-concrete composite beams, while nonlinear methods based on material constitutive models can accurately predict the bearing capacity of materials. In summary, the current research has conducted an in-depth analysis of the expansion ratio, span-height ratio, plate width-thickness ratio, and effective width of concrete flange plate, etc. Numerous experimental studies have been carried out for flexural load capacity, stiffness, buckling of honeycomb beams and their combination beams, and the corresponding design calculation equations for honeycomb beams and their combination beams have been proposed. However, there is limited research on the application of honeycomb beams to concrete composite floors. The truss steel composited plate is a prefabricated steel truss formed by welding the lower part of the bent steel bars with the upper and lower longitudinal bars in the slab in the laminated layer and then tied to the upper layer of the reinforcing steel and cast-in-place concrete to form a concrete slab with overall stress [22]. Many webs of truss reinforcement are interspersed in the laminated layer and the cast-in-place layer, which facilitates a tight connection between the two layers of concrete.