APPLIACTION OF LIGHTWEIGHT AGGREGATE CONCRETE IN THE COMPOSITE SLABS OF MULTI-STOREY LIGHTWEIGHT STEEL STRUCTURE
Compared to normal aggregate concrete (NAC), the lightweight aggregate concrete (LAC) has many advantages, such as light deadweight, good thermal insulation behavior, efficient fire resistance and good seismic behavior, by using lightweight aggregates. Consequently, it has a more and more widespread application in multi-storey lightweight constructions abroad. Nonetheless, researches on LAC are limited in China, so the corresponding application scope is restricted. For steel-concrete composite slabs, by using the LAC, on one hand the section dimensions of columns and beams can be reduced, so can that of the foundations. On the other hand, the fairly bigger stiffness of composite slabs could overcome the problem of excessive deflection which would probably coursed by LAC slabs. Therefore, the steel-concrete composite slab with LAC is a reasonable structure form of floors which could also bring in a good economic benefit. In this paper, the researches and application on LAC are reviewed, and the application prospect of LAC in the composite slabs of multi-storey lightweight steel structures, which including the traditional T-shape composite slab and the new type of composite slim slab, is analyzed. In addition, the difference in load bearing behavior between NAC and LAC are illustrated. At the end, the design points and construction details of LAC composite slabs are proposed which may be referred in practical projects.
lightweight aggregate concrete (LAC) lightweight steel structure composite slab design points
Lu Yang Yuang-Qing Wang Yong-Jiu Shi
Department of Civil Engineering, Key Laboratory of Structural Engineering and Vibration of Education Ministry, Tsinghua University, Beijing 100084, P.R. China
国际会议
广州
英文
665-668
2009-11-28（万方平台首次上网日期，不代表论文的发表时间）