An experimental study of thin U-shell ferrocement precast beam-column connections | |
| Author | Tanyaporn Komvijit |
| Call Number | AIT Thesis no.ST-18-28 |
| Subject(s) | Precast concrete beams--Testing Structural frames--Joints |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Structural Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ST-18-28 |
| Abstract | Due to the shortage of labor in construction industry, the need of construction quality, and the very competitive construction market, the precast concrete structures were adopted in Thailand just like the other leading countries in precast concrete construction. The use of skeletal frame precast system has been wide spread in small to large structural members. However, the inventions and innovations of precast concrete system for skeletal frame structures were initially made for large member size. Thus, the available precast beam-column connection technologies are not suitable for the small structures (small office, home, residential building) in Thailand. This research emphasizes on the development of the new U-shell precast beam-column connection for small beam (approximately 20-cm wide). To save the space in the middle of the beam for rebar splicing for continuity of bending moment transfer, ferro-cement technology is adopted to minimize the thickness of the shell to be as thin as 2.5 cm. The mixture proportioning of mortar for shell construction and for splicing space filling was developed using ordinary material to control the cost of this given system in order to encourage the wide use in construction. Since the shell will serve as a formwork for joint casting and the temporary support for the precast beam before the joint casting, the gravity load carrying capacity test of a precast beam, connected with the U-shell on both ends, was carried out and the U-shell exhibited an excessive load carrying capacity. The sub-assemblage specimen of beam-column connections were constructed by cast in-situ technique as a control specimen, and by ferro U-shell precast technique for gravity load carrying performance comparison. The point load application was distributed to simulate the uniformly distributed load in the real situation. The precast specimen can carry the gravity load magnitude, 78% of the maximum load that was carried by cast in-situ specimen due to the effort to minimize the splice length to only 55% of the length required by the code ACI-318. |
| Year | 2018 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-18-28 |
| 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) | Punchet Thammarak; |
| Examination Committee(s) | Anwar, Naveed;Pennung Warnitchai; |
| Scholarship Donor(s) | Royal Thai Government Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2018 |