古木结构抗震经验评价方法的优化与评价体系的建立
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摘要
结合武汉市文物保护单位古木结构建筑的抗震评价经验,分析原评价方法中各项评价准则和内容的由来.依据相关规范、最新研究成果及震害实例,按照新的抗震设防要求,从评价细则与评价表格2个方面改进原评价方法.新方法细化和量化了原评价方法中的评价内容,使评价人员在进行实地调查和评价古木结构建筑的工作中,能做到调查有侧重,评价有依据.通过计算峰值加速度、地震影响系数等特征值,得到了在三水准分区划抗震设防要求下,不同震害区间所对应的限值,并以此建立新的评价体系.结合武汉市地震动小区规划图,用新的评价方法和评价体系,对武汉市部分古木结构建筑的震害进行预测,得出震害结果.
Based on the rich seismic evaluation experiences of cultural relics protection units in Wuhan of China,the origins of the principles and contents in original seismic evaluation approach of Chinese ancient wooden structures were analyzed.According to referent seismic resistance criteria,newest research results and seismic damage examples,two new ways were proposed based on the newest seismic evaluation demands.The evaluation contents and evaluation tables were improved to specify and quantify the original evaluation contents.According to the proposed method,the person who conducts evaluation work can realize the key point and basis of real investigation and evaluation project.The peak accelerations and the seismic coefficient characteristic values were calculated to achieve the limit values for diffe-rent earthquake damage ranges under seismic resistance requirements of three standards in divided zones.Therefore,a new evaluation system was set up.Based on the plan picture of dynamic coefficients in divided zones of Wuhan,earthquake damages of ancient wooden structures were predicted by the proposed evaluation method and evaluation system to obtain the earthquake damage evaluation results.
Based on the rich seismic evaluation experiences of cultural relics protection units in Wuhan of China,the origins of the principles and contents in original seismic evaluation approach of Chinese ancient wooden structures were analyzed.According to referent seismic resistance criteria,newest research results and seismic damage examples,two new ways were proposed based on the newest seismic evaluation demands.The evaluation contents and evaluation tables were improved to specify and quantify the original evaluation contents.According to the proposed method,the person who conducts evaluation work can realize the key point and basis of real investigation and evaluation project.The peak accelerations and the seismic coefficient characteristic values were calculated to achieve the limit values for diffe-rent earthquake damage ranges under seismic resistance requirements of three standards in divided zones.Therefore,a new evaluation system was set up.Based on the plan picture of dynamic coefficients in divided zones of Wuhan,earthquake damages of ancient wooden structures were predicted by the proposed evaluation method and evaluation system to obtain the earthquake damage evaluation results.
引文
[1]四川省建筑科学研究院.GB50165—92古建筑木结构维护与加固技术规范[S].北京:机械工业出版社,2008.
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[2]高大峰,赵鸿铁,薛建阳.木结构古建筑中斗栱与榫卯节点的抗震性能—试验研究[J].自然灾害学报,2008,17(2):58-64.Gao Dafeng,Zhao Hongtie,Xue Jianyang.A seismiccharacteristics of bucket arch and mortise-tenon joint ofancient Chinese timber buildings:exprimental reseach[J].Journal of Natural Disasters,2008,17(2):58-64.(in Chinese)
[3]张敏.建筑结构抗震分析与减震控制[M].成都:西南交通大学出版社,2007:1-20.
[4]Thomson W T.Theory of Vibration with Application[M].Englewood Cliffs:Prentice-Hall,Inc,1981.
[5]Ariarantnam S T,Xu L.Uniqueness in analysis of semi-rigid frames[J].Journal of Structural Engineering,1996,122(1):110-111.
[6]Morse-Fortier L J.Structural implications of increasedpanel use in wood-frame buildings[J].Journal ofStructural Engineering,1995,121(6):995-1003
[7]King W S,Chen W F.LRFD analysis for semi-rigidframe design,engrg[J].Journal of AISC,1993,30(4):130-140.
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