wilberz
Structural
- Jul 21, 2015
- 77
Hoops around columns enclosing main longitudinal bars at the corners were required to have both 135 degree turns at the ends. But it's difficult to turn them both 135 degrees at construction site and for vibrator to get inside so in the Philippines. We usually have only one turn 135 degrees and the other end 90 degrees but the hoops were inserted or rotated alternatively.. such as the following illustration shows:
What would be the effect of the performance of it. Let's say each hoop is spaced 100mm (4 inches) apart, if the column shear apart from seismic cyclic loading, note the hoop with the 90 degree turns can open up but it's neighboring hoop is closed.. can you imagine it? Here's actual picture of a column:
What would be the effect of the performance of it. Let's say each hoop is spaced 100mm (4 inches) apart, if the column shear apart from seismic cyclic loading, note the hoop with the 90 degree turns can open up but it's neighboring hoop is closed.. can you imagine it? Here's actual picture of a column:
