基于区间数理论的基坑周边建筑物风险模糊评判
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摘要
以建筑的沉降值、倾斜度和损伤系数为代表性指标,提出了基坑周边建筑风险的评判流程.引入了区间数理论来描述上述指标的随机性;为了使指标有广泛的代表性,通过有限元模拟来计算沉降值和倾斜度,引入损伤系数来反映建筑的损伤状态;针对评判标准的模糊性,提出了4级S型隶属度函数;针对建筑风险的特点,将实数的超标加权法引入到区间数,并作了相应的改进.工程应用表明,用这3种指标分别评判的风险等级互有偏差,而综合评判的风险等级则大致符合实测结果.
An evaluation procedure was proposed for buildings adjacent to excavation by taking the settlements,inclinations and damage coefficients of buildings as typical indexes.Interval theory was used to describe the randomness of these above indexes.For the representativeness of these indexes,the settlements and inclinations of buildings were calculated by finite element simulation,and the damage coefficients were introduced to reflect the damage states of buildings.Four membership functions of S-type were proposed for the fuzziness of evaluation standards.Super weight method of real numbers was introduced and improved to interval numbers for the characteristics of building risks.Application results have shown that there are deviations among the risk grades judged respectively by these three indexes,but the risk grades synthetically judged correspond with the measured results approximately.
An evaluation procedure was proposed for buildings adjacent to excavation by taking the settlements,inclinations and damage coefficients of buildings as typical indexes.Interval theory was used to describe the randomness of these above indexes.For the representativeness of these indexes,the settlements and inclinations of buildings were calculated by finite element simulation,and the damage coefficients were introduced to reflect the damage states of buildings.Four membership functions of S-type were proposed for the fuzziness of evaluation standards.Super weight method of real numbers was introduced and improved to interval numbers for the characteristics of building risks.Application results have shown that there are deviations among the risk grades judged respectively by these three indexes,but the risk grades synthetically judged correspond with the measured results approximately.
引文
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[14]谢季坚,刘承平.模糊数学方法及其应用[M].3版.武汉:华中科技大学出版社,2006:28-36.XIE Ji-jian,LIU Cheng-ping.Fuzzy mathematics method and application[M].3rd Edition.Wuhan:Huazhong University of Science&Technology Press,2006:28-36.(In Chinese)
[15]徐肇忠.专题制图中各有关专题要素求权方法的比较研究[J].测绘学报,1995,24(1):64-70.XU Zhao-zhong.A comparative study on weighting the related thematic features in thematic cartography[J].Acta Geodaetica et Cartographica Sinica,1995,24(1):64-70.(In Chinese)
[16]徐泽水,达庆利.区间数排序的可能度法及其应用[J].系统工程学报,2003,18(1):67-70.XU Ze-shui,DA Qing-li.Possibility degree method for ranking interval numbers and its application[J].Journal of Systems Engineering,2003,18(1):67-70.(In Chinese)
[2]BOWLES J E.Foundation analysis and design[M].New York:McGraw-Hill Book Company,1986:38-42.
[3]RANKIN W J.Ground movements resulting from urban tunneling:Predictions and effects[C]//Engineering Geology of Underground Movements,London,1988:79-92.
[4]GB 50007-2002建筑地基基础设计规范[S].北京:中国建筑工业出版社,2002.GB 50007-2002Code for design of building foundation[S].Beijing:China Architecture and Building Press,2002.(In Chinese)
[5]龚东庆.深基坑引致邻近建筑物损害评估方法[J].岩土工程学报,2008,10(S1):138-143.GONG Dong-qing.Procedure for evaluating excavation induced damage of adjacent buildings[J].Chinese Journal of Geotechnical Engineering,2008,10(S1):138-143.(In Chinese)
[6]边亦海,黄宏伟.深基坑开挖引起的建筑物破坏风险评估[J].岩土工程学报,2006,28(S11):1892-1896.BIAN Yi-hai,HUANG Hong-wei.Risk assessment of building damage induced by deep excavation[J].Chinese Journal of Geotechnical Engineering,2006,28(S11):1892-1896(In Chinese)
[7]张驰,黄广龙,李娟.深基坑施工环境影响的模糊风险分析[J].岩石力学与工程学报,2013,32(S1):2669-2675.ZHANG Chi,HUANG Guang-long,LI Juan.Fuzzy risk analysis for influence of deep foundation pit excavation on surrounding environment[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(S1):2669-2675.(In Chinese)
[8]黄宏伟,陈龙,胡群芳,等.隧道及地下工程的全寿命风险管理[M].北京:科学出版社,2010:149-176.HUANG Hong-wei,CHEN Long,HU Qun-fang,et al.Lifecycle risk management of tunnel and underground engineering[M].Beijing:China Science Press,2010:149-176.(In Chinese)
[9]吴朝阳,李正农,罗叠峰,等.长沙地铁袁家岭车站基坑对周边建筑影响的有限元模拟研究[C]//第19届全国结构工程学术会议论文集(Ⅱ).北京:清华大学出版社,2010:331-335.WU Zhao-yang,LI Zheng-nong,LUO Die-feng,et al.Finite element modeling research for the impact of the yuanjialing subway station in changsha to the nearby buildings[C]//Proceedings of the 13th national conference on structure engineering(Ⅱ).Beijing:Tsinghua University Press,2010:331-335.(In Chinese)
[10]李瑞礼.历史建筑损伤检测与寿命预测的数值仿真[M].上海:上海科学技术文献出版社,2005:46-52.LI Rui-li.Damage detection and numerical simulation of life prediction of historical building[M].Shanghai:Shanghai Scientific and Technological Literature Press,2005:46-52.(In Chinese)
[11]GB 50292-1999民用建筑可靠性鉴定标准[S].北京:中国建筑工业出版社,2000.GB 50292-1999 Standard of appraiser of reliability of civil buildings[S].Beijing:China Architecture and Building Press,2000.(In Chinese)
[12]卜广志,张宇文.基于三参数区间数的灰色模糊综合评判[J].系统工程与电子技术,2001,23(9):43-45.BU Guang-zhi,ZHANG Yu-wen.Grey fuzzy comprehensive evaluation method based on interval numbers of three parameters[J].Systems Engineering and Electronics,2001,23(9):43-45.(In Chinese)
[13]蒋冲,赵明华,曹文贵.基于区间分析的岩土结构非概率可靠性分析[J].湖南大学学报:自然科学版,2008,35(3):11-14.JIANG Chong,ZHAO Ming-hua,CAO Wen-gui.Non-probabilistic reliability research on uncertain parameters in rock mechanics[J].Journal of Hunan University:Natural Sicences,2008,35(3):11-14.(In Chinese)
[14]谢季坚,刘承平.模糊数学方法及其应用[M].3版.武汉:华中科技大学出版社,2006:28-36.XIE Ji-jian,LIU Cheng-ping.Fuzzy mathematics method and application[M].3rd Edition.Wuhan:Huazhong University of Science&Technology Press,2006:28-36.(In Chinese)
[15]徐肇忠.专题制图中各有关专题要素求权方法的比较研究[J].测绘学报,1995,24(1):64-70.XU Zhao-zhong.A comparative study on weighting the related thematic features in thematic cartography[J].Acta Geodaetica et Cartographica Sinica,1995,24(1):64-70.(In Chinese)
[16]徐泽水,达庆利.区间数排序的可能度法及其应用[J].系统工程学报,2003,18(1):67-70.XU Ze-shui,DA Qing-li.Possibility degree method for ranking interval numbers and its application[J].Journal of Systems Engineering,2003,18(1):67-70.(In Chinese)