| Title |
Reversed Cyclic Loading Test of Post-Tensioned Precast Concrete Beam-Column Connections with 2400MPa Prestressing Strands |
| Authors |
Hwang, Jin-Ha ; Choi, Seung-Ho ; Lee, Deuck Hang ; Kim, Kang Su ; Woo, Woon Tack |
| DOI |
https://doi.org/10.5659/JAIK_SC.2017.33.12.45 |
| Keywords |
Beam-column connection ; Precast concrete ; Post-tension ; 2400MPa strands ; Seismic performance |
| Abstract |
The precast concrete (PC) method has many advantages in fast construction, quality control, etc. In domestic construction market, however, its application has been quite limited because of the concerns about structural integrity and seismic performances due to the discrete connections between precast concrete members. By applying the post-tensioning method, the precast beam-column connection can be well tightened, allowing improved structural integrity, and proper seismic performances can be also achieved. In this study, reversed cyclic tests have been conducted on the beam-column connection specimens, where the test variables included the compressive strength of grouting mortar and the tensile strengths of prestressing strands, based on which their seismic performances have been examined in detail. The post-tensioned PC beam-column connections showed good seismic performances comparable to that of the monolithic reinforced concrete connection specimen. When 2400 MPa prestressing strands are applied to the beam-column connection, it is preferable to adjust the prestress level similar to that applied for the 1860 MPa prestressing strands to avoid premature local crushing failures at the beam-column connections. |