Experiments on tension force carrying capacity of grouted rebar splice in steel pipe confinement | |
| Author | Su Yee Lei |
| Call Number | AIT Thesis no.ST-20-26 |
| Subject(s) | Precast concrete construction Grout (Mortar) |
| 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-20-26 |
| Abstract | A precast concrete system is widely used around the world due to several advantages. It is crucial to have a strong connection between the component of the precast concrete system. There are several types of connections such as welding connection, bolt connection and mechanical couplers. Among several types of connections, the simplified and effective type of connecting rebar, which can drastically reduce the ACI minimum required lap length, is investigated in this experiment. The tensile load carrying capacity of grouted lapping connector and behaviour under uniaxial tensile load are investigated. The lap length, the steel pipe diameter, the rebar diameter, and the steel pipe thickness are varied. The effect of varying each parameter on tensile capacity and confinement of the connector will be studied. In some construction site, the spacing of the stirrups controls the lapping of the rebar. The split grouted lapping connectors are introduced in this experiment. Their tensile carrying capacity will be investigated and compared with non-split grout lapping connectors. It is investigated that almost all the specimens with 16 mm diameter rebar satisfied the strength rating in 100 mm lap length. However, only a few specimens pass the ACI strength rating requirement for 20 mm rebar. For 200 mm lap length, all specimens satisfied the ACI strength rating requirement. Increasing lap length and bar diameter increase the tensile capacity of lapping specimens. Hoop transverse tensile force reduces with the increase of the lap length. The end hoop tensile force is higher than the middle hoop force as the end hoop tensile force is higher than the middle hoop force. This is because the grout at the end of the pipe was sliding or tended to slide out of the pipe at the late loading stage, resulting in a more significant expansion. The tensile capacity of all three non-split specimens is higher than that of the split-grout connector. |
| Year | 2020 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-20-26 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| 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) | Pennung Warnitchai;Thanakorn Pheeraphan; |
| Scholarship Donor(s) | GMS Scholarship (Thailand); |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2020 |