Active Strengthening Method of Single-Span Reinforced Concrete Beam Bridge

The invention discloses an active strengthening method of a single-span ordinary reinforced concrete beam bridge, wherein a steel arch sheet is added under the single-span ordinary reinforced concretebeam to be strengthened, and a steel support column is arranged between the steel arch sheet and the ordinary concrete beam. A method for increase arch sheet A rigid restrained bracing system is formed between the reinforced arch and the original reinforced concrete beam, and a rigid restrained bracing system is formed between the reinforced arch and the original reinforced concrete beam, As thatinternal force of the beam is reduce, the bearing capacity of the bridge can be greatly improve, the overall rigidity of the bridge to be strengthened can be increased, the crack width of the beam body can be effectively contracted, the durability of the bridge can be improved, and the horizontal thrust generated by the steel arch sheet arch foot is favorable for balancing the earth pressure behind the abutment. The reinf