The Research On Anti-seismic Performance Of Reinforced Masonry Structure Schoolhouse

May12.2008,occurred8.0earthquake that shocked the world in Wenchuan, resulting in a large number of building collapse, in the earthquake, the school building damage is very serious, especially the premises of the masonry structure, destruction and collapse phenomenon is very serious, there are many teachers and students were killed, resulting in a huge social impact. The safe projects of school buildings is officially launched in April2009, anti-seismic evaluation on the schoolhouse throughout the country,reinforcement or alteration to the schoolhouse does not meet the identification requirements.Earthquake damage survey data indicate that in strict accordance with the specifications anti-seismic design and to ensure the construction quality of buildings, and basically maintained in good condition. This paper discusses the rational layout of the building structure and seismic structure to how to ensure seismic safety, it is recommended that in masonry structure design should pay attention to the conceptual design.By summing up the status quo of the existing masonry structure schoolhouse, analyzes the cause of schoolhouse collapsed in the earthquake is serious, and discusses the main security risks of the masonry structure schoolhouse:Security risks for the schoolhouse of the masonry structure, summary of the reinforcement program, and comments on the practicality and advantages and disadvantages of a variety of program.In this paper, a primary school classroom building of masonry structure is reinforced, and use the software JDJG to identify the anti-seismic capacity of the teaching building, a larger increase of the anti-seismic capacity of reinforced structure, on each floor of vertical and horizontal anti-seismic capacity index greater than1, meet regulatory requirements. For masonry structures of Lower mortar strength, use double-sided steel mesh mortar reinforced walls, can significantly improve the anti-seismic capacity and energy dissipation capacity of the structure.Application SAP2000Pushover analysis to the projects, wall of masonry structures simulation using nonlinear layered shell element, displacement angle based on the analysis proceeds to evaluate the anti-seismic performance of the classroom building. Analysis obtained: classroom building by the reinforcement, strength, stiffness and ductility can be significantly improved; reinforced structure analysis, proceeds layer displacement angle to meet the "small earthquakes are not bad" and "earthquake does not fall" anti-seismic requirements; structure in the rare earthquake, vertical wall window and door openings corner and the bottom of the stairwell, crack damage is more serious, phase with the roof at the cross walls and the bottom horizontal wall crack damage is more serious; nonlinear layered shell element more suited to simulated the nonlinear behavior of the wall masonry structure.