Research In Affection Of Steel Ratio To Seismic Performance Of The Improved Welding Stirrup Steel Plate-Concrete Coupling Beam

In order to solve the problem of small cross ratio of shear wall beam of out-of-gauge and shear wall limbs stirrup layout, and the improved coupling beam welding steel plate stirrup is put forward. Steel coupling beam makes full use of plate shear bearing capacity, in order to achieve in the beam bending failure, and form the plastic hinge, even the beam shear at the stage of elastic working state.By means of the displacement control load, loading test the three 1:3 scaled improvement of coupling beam welding steel plate stirrup- the low levels of shear wall specimen weeks reciprocating quasi static. Three specimens with the thick Ness say 8mm, 10 mm, 12 mm of the steel plate as change parameters. The test results show that the coupling beam with high steel ratio of shows more ideal deformation ability, and has higher ductility. Built in specimens of steel reinforced concrete beam when in yielding, can be formed in the beam end plastic hinge, and enter into the bearing capacity of reinforced phase with a relatively full hysteretic curve.Based on Adina, analysis on the three specimens respectively model for numerical model is established, and the results show that thick Ness of the three kinds of steel plate has little influence on the process and scope of beams. Further bearing and deformation ability is indicated because of little damage to the steel plate itself; Calculated the hysteresis curve is full, therefore, specimen has good ductility and energy dissipation capacity. Stirrup axial strain values of the limb part is at low level, the edge component force of longitudinal reinforcement in the constraint function can be guaranteed.With the increase of the steel content in built-in steel reinforced concrete beam, and the yield displacement of specimen is reduced, the ultimate displacement increases, the ductility ratio increases, besides, plastic hinge is formed after destruction with bigger safety reserves. Big steel plate thick Ness of specimen the wall beam node is larger, longitudinal reinforcement strain shows more significant deformation performance, under the earthquake action, and can therefore more effectively consuming earthquake energy.