基于ABAQUS的新型密拼叠合板承载能力比较研究

为优化密拼式叠合板侧向拼缝处的连接构造，设计一种在拼缝处设置抗剪键槽的密拼式钢筋桁架叠合楼板。利用ABAQUS有限元软件对7个密拼叠合楼板进行四点弯曲模拟研究，针对普通密拼式叠合板与不同形式的抗剪键槽密拼式叠合板的承载能力进行对比分析。结果表明：新型密拼式叠合楼板的承载能力较好，相较于普通密拼式叠合板提升了17%左右；当达到极限荷载时，其内置钢筋所受应力明显低于普通密拼式叠合板。通过对不同开槽形式叠合板的受弯性能进行对比分析，明确了新型抗剪键槽叠合板拼缝处设计的合理性，为新型拼缝叠合楼板在工程实践中的应用提供了理论依据。

Comparative study on the load-bearing capacity of a new type of composite slab connected without gap based on ABAQUS

In order to optimize the connection structure at the lateral joint of the composite slab connected without gap, a reinforced truss composite slab connected without gap with shear keys at the joint was designed. The finite element software ABAQUS was used to simulate the four-point bending of seven composite slabs, and the load-bearing capacity of ordinary composite slab connected without gap was compared with those with different forms of shear keys. The results show that the load-bearing capacity of the new composite slab connected without gap is better, which is 17% higher than that of the ordinary ones. When the ultimate load is reached, the stress of the inner steel bar is obviously lower than that of the ordinary assembled composite slab. Through comparative analysis on the flexural performance of the composite slabs with different slotted forms, the rational design of the groove splicing joint of the new shear keyway composite slab is determined, which provides theoretical basis for the application of the new type of composite slab in engineering practice.