Cycle performance tests and numerical modeling of infilled CFS shear walls. (May 2020)

• Record Type: Journal Article
• Authors: Wu, Hanheng; Sui, Lu; Wang, Jiqin; Zhou, Tianhua
• Is Part Of: Journal of constructional steel research. Volume 168(2020)
• Publication Date: 2020-05
• Subjects: Cold-formed steel -- Shear walls -- Fastener tests -- Cyclic loading tests -- Numerical models; Steel, Structural -- Periodicals; Building, Iron and steel -- Periodicals; Acier de construction -- Périodiques; Construction métallique -- Périodiques; 624.1821
• DOI: 10.1016/j.jcsr.2020.106010
• Languages: English
• ISSNs: 0143-974X

Abstract

Abstract: The infilled CFS shear walls with FGD gypsum were developed in the paper. For lightweight design, the FGD gypsum was mixed with glazed hollow beads and air-entraining agents. Five full-scale specimens were investigated under cyclic horizontal loads. The configuration of the specimens varied in compressive strength of infilled gypsum and sheathing types. The shear performance of the walls can be improved obviously due to the participation of infilled material. The failure modes are characterized by the loss of stressed skin provided by sheathings together with compressive failure of infilled gypsum. Besides, a series of tests concerning fastener responses and material characteristics of gypsum was conducted. Furthermore, the numerical models based on OpenSEES were proposed. After calibration of parameters, a combination of beam elements with pinned joints, zero-Length elements with Pinching-4 material and equivalent truss elements with Concrete-01 material was employed to describe the nonlinear behaviour of the infilled walls. The comparison between tests and simulations was then carried out. The results of numerical models have an agreement on test results. The developed numerical model can be used for predicting cycle performance of the infilled CFS walls and related analysis of structural systems in further studies. Highlights: The infilled CFS shear walls with FGD gypsum were proposed. Cyclic loading tests of the infilled walls were conducted. Failure of the walls is caused by fastener connections and infilled gypsum. A numerical model based on OpenSEES was developed to simulate the cyclic responses of the CFS walls.