The Earthquake Resistant Behavior Evaluation And Reinforced Beam Stress Hysteresis Analysis Of Frame Structure On Active Service

In accordance with the construction of 79 series of code for design of building, to analyze the current guidelines, the seismic performance can not meet the requirements,so it has to be the seismic evaluation and reinforcement. For reinforcement construction, the new structure of the stress strain strain lagged behind the original structure, it is necessary to consider the stress hysteresis effect on the reinforcement structure. The main results of this thesis are as follows.1. Before the strengthening works of Huimin hospital, the calculation reinforcement will lead to some columns into the yield state under rare earthquake,which will require some strengthening engineering work before it put into use;however the frame column won’t yield if actual reinforcement is used, and at the same time, the damage of the beams is also slight, the building can be put into use without or after little repair. Strengthened Huimin hospital got its member states good, and have a perfect fit with anticipation.2. After structure reinforcement, due to the stress lag, the bending moment of the original floor increases significantly, while that of the added secondary beam decreases. This will cause the difference between the failure load of the floor and the secondary beam, which is out of the expected result.3. The interaction between secondary beam and floor is considered in the program of ANSYS when calculating bend moment, while the program in PKPM does not. This cause the difference between their results in bend moment.