Safety Appraisal And Anti Seismic Reinforcement Of An Existing Middle School Teaching Building

After the Wenchuan earthquake, the state began the construction of primary and secondary schools’ safety engineering, the goal is to reinforce school buildings in the country, improve the comprehensive disaster prevention and capacity-building for school buildings to achieve focus fortification class seismic standards.In this paper, a secondary school building is given detection and identification, and based on the results to give this building seismic strengthening to enable it to meet current national standards, the main contents are as follows:1. This paper expounds the method of reinforced concrete structure detection and identification, summarized the detection of concrete strength, steel performance of detection and the appearance of concrete and the crack detection methods,concluded that the reliability evaluation method of concrete structure and evaluation system.2. According to the method and system of structural inspection and reliability assessment, the safety appraisal and reliability assessment of a certain teaching building in the middle school is carried out.3. For a middle school teaching building of detection results, and combined with the teaching building seismic performance characteristics of summed up the single span frame under earthquake action common failure modes, and common and single span frame structure reinforcement method, draws the conclusion that the concrete structure strengthening method.4.Using ETABS software to the teaching building of seismic performance analysis, respectively of the original structure, adding frame column reinforcement,adding shear wall reinforcement, four kinds of structural strengthening with adding additional isolation cushion, the were modal analysis, response spectrum analysis and time history analysis, different reinforcement methods of structure self vibration period, layer stiffness, displacement and interlayer displacement angle changes werecompared and analyzed, choose a more economic and reasonable reinforcement scheme.