| Author | Krit Laohakunvetit |
| Call Number | AIT Thesis no.ST-08-01 |
| Note | A thesis submitted in partial fulfillment of the requirements for the
degree of Master of Engineering in Structural Engineering, School of Engineering & Technology, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ST-08-01 |
| Abstract | In the present, the precast concrete system is favored to be constructed in
many regions because it is economical, and it can increase speed of construction.
However, the precast concrete system is susceptible to collapse in the seismic
events. As a result, it is not widely used in high seismic regions. From this
awareness, many researchers have been developing the precast concrete system to
sustain the earthquakes. There have been many configurations of new precast
beam-column connections. Some of newly developed precast beam-column
connections such as the hybrid connection were selected to be tested in this
experimental study. The hybrid connection was selected because it could show
satisfactory seismic performances. Further, it could maintain the advantages of
the precast concrete system such as ease of construction and economy also. In
this study, to examine seismic behaviors and performances of the hybrid
connection, the experiment was conducted by quasi-static cyclic loading test. The
subassemblages chosen for this study were interior and exterior beam-column
connection to totally understand behaviors of the hybrid connection. The four
specimens were tested in this study. The specimens were subjected to reversed
cyclic loading, initialed at 0.25% story drift and gradually increased up to 6.00%
story drift. The first specimen showed poor seismic performances in excessive
stiffness degradation and low energy dissipation due to poor bond performance in
mild steels. However, the unsatisfactory performances could be eliminated by
improving such bond performance. The developed specimens did not show those
poor performances. Moreover, both fully unbonded, and partially bonded
prestressing strand system were tested in this study to clearly comprehend the
behaviors and performances of the hybrid connection in both systems.
Eventually, the promising details of the hybrid connection were achieved. The
seismic behaviors of the hybrid connection could be deeply understood, and they
were in accordance with the assumption of the NIST. The important behaviors of
the hybrid connection could be precisely predicted such as the connection
strength and strain in the post-tensioning tendon. The hybrid connection also
showed stability of stiffness and strength even in high story drift levels. In
addition, it exhibited the low stiffness degradation and large energy dissipation.
The small residual displacement at the connection and minimal damage on
structural elements were found also. |
| Year | 2008 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-008-01 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Pennung Warnitchai; |
| Examination Committee(s) | Widjaja, Joko Harsano ;Anwar, Naveed ; |
| Scholarship Donor(s) | Royal Thai Government Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2008 |