| Title |
Development of Precast Hollow Concrete Columns with Non-Shrink Mortar Grouting Type Splice Sleeve |
| Keywords |
non-shrink mortar grouting;splice sleeve;precast column;seismic performance;displacement ductility;hollowness;무수축 모르타르 그라우팅;슬리브;프리캐스트 교각;내진성능;변위연성;중공율 |
| Abstract |
??In general, the precast columns can obtain its homogeneous quality as they are produced in a factory with a hollow concrete block type by using high strength concrete, so that they can generate the reduction of dead load. Such a method of precast hollow concrete columns is already implemented in USA and Japan and used for connecting between blocks which use PC tendons. However, it is inevitable to have uneconomical construction with excessive cost in early stage when PC tendons are used. This study aims to develop an economical precast column with high quality and constructability which consists of only splice sleeve and general reinforcing bar without using PC tendons in order to reduce the construction period and cost. To achieve this goal, this study tested the performance of total 5 minimized models in the experiment with the variables such as hollowness, diameter of main reinforcement bar and cross-sectional size for the cross section of precast column by using grouting type splice sleeve which is a new type joint rebar. And it also verified the performance of column in the experiment for a large-sized model in order to overview its applicability by excluding large scale effect. |