| Title |
An Experimental Study on the Reinforced Concrete Beams with Square Openings |
| Authors |
최종만 ; 이화직 ; 신일범 ; 하영철 ; 곽윤근 ; 노희일 |
| Abstract |
An experimental investigation is carried out on twelve reinforced concrete beams with square openings. The size of opening, and it's location are considered as major variables. The specimens were tested under two point loading. Loads were usually applied in steps of 0.5 ton up to failure to observe the crack initiation and propagation,crack pattern, initial diagonal cracking, midspan deflection, concrete strain and reinforcement strain. Test results were as follows: 1. The size of squareopening was desirable under 0.4times of beam depth. 2. For beams having small opening (H0/D<0.35), The failure load was almost constant with the location of opening. 3. Foreams having large opening (H0/D>0.425), It appeared that the size of opening decreased the stiffness of the beam. |