Seismic performance of prefabricated light steel frame – light steel frame light concrete wall panel structure.

Paper DOI: 10.11936/bjutxb2023080027.

1. Innovatively proposed a prefabricated light steel frame light steel frame light concrete wall panel structure;.

2. A full scale light steel frame light concrete wall panel structure specimen was subjected to low cycle repeated load tests, and the structural hysteresis characteristics, bearing capacity, deformation capacity, stiffness degradation, energy dissipation performance, and strain were analyzed;.

3. A mechanical model of light steel frame light concrete wall panel structure was established, and a bearing capacity calculation method was proposed..

Rebar Cap Steel Plaate

Vigorously developing prefabricated buildings is an important measure to promote the “dual carbon” strategy, and also an important way to achieve the industrialization of construction and housing. The development of prefabricated buildings in urban areas in China is rapid, but the development of prefabricated structural systems suitable for low and multi story residential buildings in villages and towns is relatively lagging behind. The development of efficient seismic resistant, energy-saving and environmentally friendly, and convenient construction prefabricated rural residential structural systems is an urgent problem to be solved in the engineering field..

Professor Cao Wanlin and others from the research group proposed and developed a light steel composite frame structure system to meet the demand for prefabricated green buildings. Structural characteristics: 1) The light steel composite frame is composed of light square steel tube concrete columns – H-shaped steel and floor composite beams; 2) The light steel composite floor is composed of a cross light steel beam system consisting of prefabricated prefabricated thin plates, light steel main beams, and secondary beams, which are connected by bolts. The bolts are connected to the edge holes of the prefabricated floor slab using grouting material, making it easier to install and faster to construct compared to traditional cast-in-place floors. 3) Recycled concrete can be used for foundation concrete, floor concrete, and wall panel concrete to achieve green ecological structure construction..

The prefabricated light steel frame light concrete wall panel structure proposed in this article is an important development of the light steel composite frame structure system, with advantages such as efficient seismic resistance, insulation and energy conservation, and convenient assembly. The light steel frame light concrete composite wall panel is the main lateral force resistant component of the structure, and the light steel frame mainly bears vertical loads. In order to study the synergistic seismic performance of light steel frame and light steel frame light concrete wall panel structure, full-scale structural specimens were subjected to low cycle repeated load tests, elucidating the stress mechanism of the two seismic defense lines of the structure. A simplified plastic analysis model for light steel frame and a calculation model for the softened truss of tension and compression bars of light steel frame light concrete composite wall were provided, and the bearing capacity of the specimens was calculated and analyzed..

A prefabricated light steel frame light steel frame light concrete wall panel structure was proposed, and seismic performance tests were conducted on full-scale light steel frame light steel frame light concrete wall panel structure specimens under low cycle repeated loads. The sample variables include: two types of assembly structures, namely embedded assembly wall panels and externally attached assembly wall panels; Two types of light steel frame light concrete wall panels, namely frame type light steel frame light concrete wall panels and truss type light steel frame light concrete wall panels. The design drawings of embedded and external assembled wall panels are shown in Figure 1..

Studied the failure characteristics and damage process of each specimen, analyzed the structural hysteresis characteristics, bearing capacity, deformation capacity, stiffness degradation, energy dissipation performance, and strain. The results show that the combined working performance of prefabricated light steel frame and light steel frame light concrete wall panel structure is good, and the bearing capacity, stiffness, deformation capacity, and energy dissipation performance are significantly improved.