Abstract
The sustainable development of the engineering structures mainly depends on the environmental- friendly to structural components. This requires the development of sustainable and new materials and structures that would be a worthy alternative for the available. This paper proposed a novel type of cold-formed steel (CFS) shear wall which filling light EPS mortars (LEM) into the space of CFS framing. LEM-infilled CFS walls carry forward the merits of traditional CFS wall, for example lightweight, easy installation, superior earthquake resistance and efficient energy saving. Moreover, employing recycled desulfurization gypsum and EPS in the structural materials reduce environmental pollution. However, the behavior of LEM-infilled CFS wall is not fully explored yet, which results in the low understanding and application of the material around the world. Based on this background, a review of mechanical response tests will contribute to a better awareness. In this paper, three types of mechanical behaviours are discussed including axial compressive behaviour, out-of-plane flexural behaviour, and cyclic behaviour. The previous researches on the mechanical performance of LEM-infilled CFS walls were reviewed. And the typical failure patterns and general results were described and discussed. This work will provide an excellent reference to current practice and future exploration.
Highlights
The rapid development of China's infrastructure costs a lot of resources and energies and brings serious problems such as resources, energy shortage, and environmental degradation
This paper proposed a novel type of cold-formed steel (CFS) shear wall which filling light expanded polystyrene (EPS) mortars (LEM) into the space of CFS framing
The LEM prepared by using waste desulfurization gypsum and EPS as basic ingredients has great potential to be used as a worthy alternative structural material
Summary
The rapid development of China's infrastructure costs a lot of resources and energies and brings serious problems such as resources, energy shortage, and environmental degradation. Many researchers found that using EPS as an alternative to coarse aggregate in concrete could improve heat preservation and thermal insulation performance [9,10,11,12,13] It could solve the environmental problem of “white pollution” caused by plastic foam waste. The annual discharge amount of industrial by-product gypsum in China is more than 70 million tons, but the utilization rate is low This results in a large number of wastes all year round, which occupies space land, and pollutes soil and groundwater seriously. The LEM used in this paper employs desulfurization gypsum as the main cementitious material, and utilizes recycled EPS as lightweight aggregate. The research results would serve as a reasonable reference to design the new LEM-infilled CFS wall, and promote the process of sustainable structures
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