Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Earthquakes and Structures Volume 26, Number 1, January 2024 , pages 31-48 DOI: https://doi.org/10.12989/eas.2024.26.1.031 |
|
|
|
Study on seismic performance of exterior reinforced concrete beam-column joint under variable loading speeds or axial forces |
||
Guoxi Fan, Wantong Xiang, Debin Wang, Zichen Dou and Xiaocheng Tang
|
||
| Abstract | ||
| In order to get a better understanding of seismic performance of exterior beam-column joint, reciprocating loading tests with variable loading speeds or axial forces were carried out. The main findings indicate that only few cracks exist on the surface of the joint core area, while the plastic hinge region at the beam end is seriously damaged. The damage of the specimen is more serious with the increase of the upper limit of variable axial force. The deflection ductility coefficient of specimen decreases to various degrees after the upper limit of variable axial force increases. In addition, the higher the loading speed is, the lower the deflection ductility coefficient of the specimen is. The stiffness of the specimen decreases as the upper limit of variable axial force or the loading speed increase. Compared to the influence of variable axial force, the influence of the loading speed on the stiffness degradation of the specimen is more obvious. The cumulative energy dissipation and the equivalent viscous damping coefficient of specimen decrease with the increase of loading speed. The influence of variable axial force on the energy dissipation of specimen varies under different loading speeds. Based on the truss model, the biaxial stress criterion, the Rankine criterion, the Kent-Scott-Park model, the equivalent theorem of shearing stress, the softened strut-and-tie model, the controlled slip theory and the proposed equations, a calculation method for the shear capacity is proposed with satisfactory prediction results. | ||
| Key Words | ||
| axial force; calculation method; exterior beam-column joint; loading speed; seismic performance | ||
| Address | ||
| Guoxi Fan, Wantong Xiang and Zichen Dou: College of Engineering, Ocean University of China, Qingdao, Shandong, 266404, China Debin Wang: School of Civil Engineering, Dalian Jiaotong University, Dalian, Liaoning, 116028, China Xiaocheng Tang: School of Civil Engineering, Jilin Jianzhu University, Changchun, Jilin, 130000, China | ||