Earthquake Damage Evaluation of T-Shaped SRC Composite Column-Steel Beams in 3D Connection Joints

Abstract

This paper focuses on the study of seismic-induced damage assessment of three-dimensional (3D) joints connected with T-shaped steel reinforced concrete (SRC) column-steel beams. Low cyclic reversed loading tests on one planar joint and nine 3D joints were firstly conducted to intensively investigate the seismic behavior of the hybrid joint. The damage index calculation models such as the displacement-based type, energy-based type and displacement & energy-based type were discussed and applied for all the specimens according to the experimental results. In addition, the effects of shape steel configuration type, loading angle and axial compression ratio on the damage development and accumulation for test specimens were analyzed through Park-Ang model. The analysis results show that the selected parameters of damage-index calculation models have great effect on the developing trends of damage curves. Under the same ability of relative deformation, the accumulated damage of the specimens configured with T-shaped steel are much larger than that of the specimens configured with channel-shaped and solid-web steels; moreover, the degree of damage accumulation for the specimens under 30° and 60° loading angles is slightly larger than that of the specimens under 45° loading angle. The specimens subjected to a lower axial force level have a faster damage development, but the damage accumulation is smaller than that of the specimens under a higher axial compression ratio.

Investigation on Shear Capacity of Joints between Steel Reinforced Concrete Special-Shaped Column and Reinforced Concrete Beam

“…Investigation of shear walls with steel truss coupling beams under seismic loading also shows that the hysteretic behavior is obviously improved (Deng et al, 2018). Moreover, it is also reported that in SRC, the ductility, capacity of energy dissipation, stiffness degradation, and reliability of elements' area are satisfactory (Jiang et al, 2018;Feng et al, 2020), and the joint generally performs well under seismic action (Chen et al, 2015;Xu et al, 2015;Xiang et al, 2017).…”

“…Two models of two-bay and three-story frame, including an edge frame and a middle frame, were designed and tested by Liu et al (2014), and it was found that the failure mechanism of a solid SRC frame with special-shaped columns is the beam-hinged mechanism, satisfying the seismic design principle of "strong column and weak beam." Chen et al (2015) further investigated the hysteretic behavior of specialshaped columns composed of SRC, and an axial compression ratio limit value for SRCSS columns was proposed (Chen et al, 2016). Based on shaking table experiments for a five-floor SRC spatial frame with special-shaped columns, the translational response, torsional response, and translational-torsional response were analyzed by Zhou et al (2020).…”

Structural Performances of Steel Reinforced Concrete Special Shaped Column-Beam Joints Under Bidirectional Low-Cyclic Reversed Loading

“…Bond-slip behaviors of joints were also intensively investigated [4][5][6][7][8][9][10]. Xu, Chen [11] presented a study on seismic-induced damage assessment of three-dimensional joints connected with T-shaped steel SRC column-steel beams. Liu, Xue [12] investigated the cyclic behavior of beam-column abnormal joints in steel moment-resisting frames.…”

Experimental investigation on joints between steel-reinforced concrete T-shaped column and reinforced concrete beam under bidirectional low-cyclic reversed loading

“…Bond-slip behaviors of joints were also intensively investigated (Chen et al, 2014; Liu and Wu, 2012; Wang and Wu, 2008; Wu and Jiang, 2013; Wu and Wei, 2010; Yun and Wu, 2011; Zhou et al, 2010). Xu et al (2015) presented a study on seismic-induced damage assessment of three-dimensional joints connected with T-shaped steel SRC column-steel beams. Liu et al (2015) investigated the cyclic behavior of beam-column abnormal joints in steel moment-resisting frames.…”