Recent Seismic Retrofitting Trends in Iran

سال انتشار: 1391
محل انتشار: چهارمین کنفرانس بین المللی مقاوم سازی
کد COI اختصاصی: ICCT04_420
زبان مقاله: انگلیسی
تعداد مشاهده: 1212

نویسندگان

Professor of Civil Engineering, Shiraz University, Iran

چکیده

Following the destructive Bam earthquake of 2003, the Iranian government initiated a vast program of seismic retrofitting for existing government buildings, particularly schools, throughout the country. As a result of the retrofitting program, large number of innovative techniques have been proposed and used based on the unique forms of the older Iranian masonry and steel buildings. Some of the new techniques applied to retrofit many buildings have been the subject of rigorous scientific research; however, many more new and old techniques currently in use are based merely on engineering judgement and have not yet gone through the test of scientific research. In retrofitting the masonry buildings in Iran the main challenges are finding cost-effective methods to retrofit roofs (jack arch or the composite beam-block), walls (brick or concrete block) and foundations. In retrofitting the steel buildings, it is the connections that pose the most challenging problem.The current research is not limited to the unique problems of the old Iranian buildings. It also looks at retrofitting RC buildings, particularly with steel bracing, as well as using FRP laminates. Also, as a result of the school retrofitting program, an extensive amount of field test data has become available on the strength properties of building elements. Research is conducted and large portions of this data are utilised to determine, for example, such effects as the environmental conditions, particularly those of humidity and temperature, on the shear strength of brick walls. Based on such research, it is recommended that for assessing the strength of existing unreinforced brick walls, regionalization is considered and an appropriate ‘climate factor’ is adopted.

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