Abstract
Because the lack of domestic T-section encased steel reinforced concrete(SRC) column of test results, as the main reference data to set the design specifications. This study intends to structure experimental approach to explore the T-section encased SRC column structural behavior, and the SRC column damage is difficult to get the reasonable and effective results with the theoretical analysis. This research program the test of flexure behavior of T-section encased SRC columns subjected to constant axial load with cyclically lateral force, to verify the T-section SRC column specimens seismic performance. And consider the related experimental research literature to check the required transverse reinforcement design reasonable. This study will focus on test planning and specimens detail design this year.
2.Method and Steps
On the research approach, including the collection and arrangement of Taiwan and foreign documents and materials, the body is designed and made, the post bend behavior testing, material mechanical nature testing, experimental data to try and put in order and set up and analyse such steps as the model and report are written. Direct against the experiment achievement, will direct against the following problem, will do the further discussion and understand：
(1) SRC column test related experimental research literature collection and collation.
(2) SRC column required transverse reinforcement of seismic design.
(3) The planning and design of six SRC column specimens with three different
sections.
3. Main Finding
According to this research experimental result to show that, sum up several important discoveries and do the following explanation.
1. As the SRC columns under moment to destroy phase, involving material and geometric non-linearity of the response, its mechanical behavior is very complex and difficult one from the theoretical analysis, and get to a reasonable and effective results.
2. As the SRC column of concrete, there is help around the steel beam, the beam stirrups around the demand can be compared with similar small size of the RC column.
3. To determine the plastic rotation capacity of indicators to explore the confinement stirrups of the demand, not only more in line with theoretical, and can improve the quality of construction, engineering practice with reference value.
4. The double H section apparently has a relatively good concrete confinement effect, but the current design does not consider this effect. Clearly, the existing formula there is still much room for improvement.
4. Major suggestion
Short term suggestion—Continued completion of the large size of the coated structure of T-type SRC column tests.
Major Office：Architecture and Building Research Institute Ministry of Interior
Associate Office：Architecture and Building Research Institute Ministry of Interior
At present, for "I-section" or "H-section" SRC column specimens of the seismic behavior of existing relevant literature, it is suggested again for the "T-coated" section of the SRC column, the large size the structure of the SRC column tests to confirm the coated T-type SRC column hoop needs to explore the recommendations formula is reasonable, complete understanding of the "steel reinforced concrete structure design specification", the SRC column of the coated-type failure mode and seismic behavior.
Short term suggestion—Verify the SRC column section direction with the steel and required transverse reinforcement.
Major Office：Architecture and Building Research Institute Ministry of Interior
Associate Office：Architecture and Building Research Institute Ministry of Interior
Research shows that H-section encased SRC column steel cross-section is not symmetrical, the demand will have a directional stirrups; strong bearing by the moment, the steel cross-section of concrete has a significant confinement effectiveness; and weak bearing by bending, the steel section can provide concrete confinement effect is very limited, it is recommended to follow-up study by the structure goes back to an experiment to test coated steel T-section of the SRC column stirrups demand.