Supported by National Natural Science Foundation of China (No. 50878141);Hebei Natural Science Foundation,China (No. E2011202013);High School of Hebei Science and Technology Research Youth Foundation,China(No. Q2012083)
To investigate the seismic behavior of specially shaped column joints with X-shaped reinforcement,two groups of specimens with or without X-shaped reinforcement in joint core region were tested under constant axial co...