Study on composite beams of steel floor frame

The light steel structure frame with ordinary concrete floor takes up a large proportion of the dead weight of the whole structure. The light aggregate concrete floor structure E83 can further reduce the dead weight of the structure. The research on composite beams with steel and light orthopedic concrete beams and composite beams with thin wall steel and light aggregate concrete should be carried out in depth.

The seismic performance of steel structure is better than that of other materials, but if the seismic requirements are not considered in the design, it will also bring disaster. According to the investigation of earthquake damage caused by Yishen earthquake in Japan, steel structures with improper seismic design were damaged, and most of them were light steel structures. Therefore, the working performance, failure mechanism and design method of multi-storey light housing steel structure buildings under earthquake should be carried out, including nodes, basic components and structural system.

Multi-storey light steel structure due to the smaller resistance to lateral stiffness, natural vibration period is longer, lateral displacement is difficult to control, often need to set component to resist lateral force to meet the wind load and earthquake resistance, resistance to lateral force component is large, although can avoid structure under strong earthquake collapsed, but there are still a large damage, need a lot of good, and not economic. In the past 20 years, abundant achievements have been made in the field of structural damping control research at home and abroad, such as the installation of frequencymodulated liquid dampers (TMNeduQuidQuidDashpot) Damper on the structure, which is economic. Simple, easy to install, multi-purpose, pollution-free. The consumption of TLD device and the absorption of inertia are used to reduce the oscillation response of the structure.

With light steel structure residential characteristics of new residential building structure is Europe and the United States some countries in recent years one of the symbols of housing structure development are accelerating process of housing industrialization in China, the development, the crossing, the seriation, generalization, to specialization, socialization of production and commercialization of supply of the basic direction of housing industry modernization system, The steel structure of light housing is one of the building systems that meet the requirement of this development. The National Ministry of Construction is organizing the research and development of multi-storey light steel structure residential building system structure selection, new envelope structure and partition system and steel structure components and accessories selection, structural system design and construction technology, the preparation of the corresponding design and construction technical specifications and regulations. It can be foreseen that the development and application of light housing steel structure will have a new leap in the near future.