IDENTIFYING SEISMIC RETROFITTING MEASURES FOR COMMON REINFORCED CONCRETE FRAME BUILDINGS IN NEPAL
Typical Reinforced Concrete (RC) Frame buildings with brick masonry infill are dominantly emerging building typology in the urban areas of Nepal. However, seismic vulnerability of this type of construction, as constructed in Nepal, is presumed very high. To quantify the problem, two prototypes of such buildings,developed based on a survey of the buildings to correctly simulate the building type, were researched.Computer analysis indicated increased seismic risk of such RC buildings of 2 stories and higher, the buildings lack both strength and ductility. The main vulnerability factors are inferior masonry quality, lean frames and above all lack of attention to reinforcement details. As Nepal lies in a very high seismic zone, an immediate attention is imperative to improve the seismic resilience of such buildings. Out of the various available methods, wall jacketing and introduction of shear walls are considered to be the most feasible and economically viable as well as practicable methods though other expensive alternatives are also available.Cost incurred for such interventions is estimated to be 15 to 40 percent of reconstruction.
Non-engineered buildings frame building structure masonry infill seismic retrofit
H. Shrestha A. M. Dixit
Structural Engineer,National Society for Earthquake Technology - Nepal Executive Director,National Society for Earthquake Technology-Nepal
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12(万方平台首次上网日期,不代表论文的发表时间)