Seismic behavior of outrigger truss-wall shear connections using multiple steel angles

• Published in: Earthquake Engineering and Engineering Vibration Vol. 15; no. 2; pp. 197 - 208
• Main Authors: Li, Xian, Wang, Wei, Lü, Henglin, Zhang, Guangchang
• Format: Journal Article
• Language: English
• Published: Harbin Institute of Engineering Mechanics, China Earthquake Administration 01.06.2016; Springer Nature B.V
• Subjects: Anchors; Civil Engineering; Concrete; Concretes; Control; Dynamical Systems; Earth and Environmental Science; Earth Sciences; Earthquakes; Geotechnical Engineering & Applied Earth Sciences; Joints; Mathematical analysis; Reinforced concrete; Seismic activity; Seismic engineering; Seismic response; Seismology; Shear; Steel; Structural steels; Vibration; Walls; 伸臂; 偏心剪力; 抗剪; 抗震性能试验; 桁架; 角钢; 连接式; 钢筋混凝土墙; shear connections; hybrid structures; seismic design; steel angles; reinforced concrete wall
• ISSN: 1671-3664; 1993-503X
• DOI: 10.1007/s11803-016-0316-2

An experimental investigation on the seismic behavior of a type of outrigger truss-reinforced concrete wall shear connection using multiple steel angles is presented. Six large-scale shear connection models, which involved a portion of reinforced concrete wall and a shear tab welded onto a steel endplate with three steel angles, were constructed and tested under combined actions of cyclic axial load and eccentric shear. The effects of embedment lengths of steel angles, wall boundary elements, types of anchor plates, and thicknesses of endplates were investigated. The test results indicate that properly detailed connections exhibit desirable seismic behavior and fail due to the ductile fracture of steel angles. Wall boundary elements provide beneficial confinement to the concrete surrounding steel angles and thus increase the strength and stiffness of connections. Connections using whole anchor plates are prone to suffer concrete pry-out failure while connections with thin endplates have a relatively low strength and fail due to large inelastic deformations of the endplates. The current design equations proposed by Chinese Standard 04G362 and Code GB50011 significantly underestimate the capacities of the connection models. A revised design method to account for the influence of previously mentioned test parameters was developed.