Pull-through capacity of bolted thin steel plate
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RESEARCH ARTICLE
Pull-through capacity of bolted thin steel plate Zhongwei ZHAOa* , Miao LIUa, Haiqing LIUa, Bing LIANGa, Yongjing LIa, Yuzhuo ZHANGb a b *
School of Civil Engineering, Liaoning Technical University, Fuxin 123000, China Department of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China
Corresponding author. E-mail: [email protected]
© Higher Education Press 2020
ABSTRACT The loading capacity in the axial direction of a bolted thin steel plate was investigated. A refined numerical model of bolt was first constructed and then validated using existing experiment results. Parametrical analysis was performed to reveal the influences of geometric parameters, including the effective depth of the cap nut, the yield strength of the steel plate, the preload of the bolt, and shear force, on the ultimate loading capacity. Then, an analytical method was proposed to predict the ultimate load of the bolted thin steel plate. Results derived using the numerical and analytical methods were compared and the results indicated that the analytical method can accurately predict the pullthrough capacity of bolted thin steel plates. The work reported in this paper can provide a simplified calculation method for the loading capacity in the axial direction of a bolt. KEYWORDS
1
bolted thin steel plate, refined numerical model, loading capacity, nonlinear spring element, analytical method
Introduction
Methods for joining parts are always the key issues before the construction of steel building structures, and the bolt is one of the most representative fasteners that is widely used in the connections of steel structures. The reliability of bolted connections directly determines the safety of entire structures. Hence, investigations on the mechanical behavior of bolted connections have always been a popular topic among researchers. The numerical method has been widely utilized to determine the ultimate loading capacity or potential failure modes of all types of materials [1–6] and connections. The loading process of high-strength bolt is very complex due to the change of contact state. So, more iterations are needed to detect the change in contact state between steel plates and bolt shank. The refined model of bolts has always been established in the full numerical joints to accurately consider the influence of bolts [7–13]. To simplify the bond-slip behavior between the bolt and rock, a trilinear model was utilized by Ma et al. [14]. Hwang [15] simulated the installation process based on a refined numerical model of bolt connection. Zhao et al. [16] proposed a simplified slip model for high-strength bolted Article history: Received May 30, 2019; Accepted Aug 16, 2019
connections. The numerical method was validated to help deeply understand the mechanical behavior of bolted connections. Thus, this method was adopted in this research program. Many researchers have conducted investigations on the loading capacity and failure of bolted connections when they were subjected to shear or tension force. Grimsmo et al. [
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