The structural design and earthquake resistance assessment of composite steel–concrete frame structures with welded dissipative fuses

Abstract

Mitigation of earthquake damage to buildings is a major task in structural engineering. A reliable reinforced concrete structure with composite joints is crucial to create a high-performance structural system. The paper develops and investigates alternative dissipative systems with welded fuses in reinforced concrete structures, particularly, composite steel–concrete frame structures. This paper discusses the findings of an experiment on the mechanical properties of three types of plate flanges with different geometric parameters and power factors under different cyclic loadings. Sample ductility, dissipation, and durability made it clear that increasing the plate’s cross-sectional area leads to increased bending stiffness coefficient and reduced intensity of stiffness degradation during cyclic loading. The tensile strength is twice the yield in the case of sagging, while these values are very close in the case of hogging. Samples with a high power factor have low dissipative properties, thereby contributing to the rapid wear of non-replaceable parts. Plates with a 10 × 100 mm2 cross-section have a sufficiently high resistance and the ability to dissipate the seismic vibration energy. The findings can be used in the design of residential and industrial buildings with reinforced concrete structures with welded fuses. Further research involves studying the effect of other plate parameters on improving the composite structure’s plastic parameters.