汶川地震中建筑震害衰减特征及抗震性能分析
|
摘要
通过对汶川地震中170个调查点的震害指数进行统计分析,得到了从Ⅵ度到Ⅺ度中各个烈度区内的平均震害指数值和方差,结果表明在Ⅶ到Ⅹ度区平均震害指数与烈度表基本相符,分析了Ⅵ度区和Ⅺ区内平均震害指数偏高和偏低的原因,指出前者主要因为调查点分布的原因,而后者则可能还受到该烈度区大小划分的影响。在断层距50 km内震害指数高、离散性大且衰减迅速,之外则震害较轻且变化平稳,不同类型建筑衰减的速度相异,震害指数随断层距增加的变化趋势总体符合双对数线性公式模式,分别拟合了各类建筑的衰减关系并进行了比较。最后,基于相同调查场点四类建筑同砖混建筑的震害指数对比,指出了建筑抗震能力在不同震害强度下的非线性差异。
Based on the concept of damage index,seismic damag investigation at 170 spots for five building types in Wenchuan earthquake(Ms8.0) is described in this paper.Mean damage indexes and variance are calculated for all building types in seismic intensity zone from Ⅵ to Ⅺ.Results show that the mean damage indexes are consistent with corresponding values in the Chinese seismic intensity scale for Ⅶ toⅩ intensity zones.Abnormity in Ⅵ intensity zone is caused by the distribution of survey spots,while abnormity in Ⅺ intesit zone may be influenced by the spots distribution and the determined intensity area.Damage index is high and strongly discrete and quickly decreases within 50 km to the fault,while it is weak and stable in farther area.The damage attenuation relationships for all building types are fitted by using log-log linear equation.At last,the damage index of brick-concrete building is compared with other four building types at same survey spot.The comparison shows that the aseismic performance difference is nonlinear at different damage degrees.
Based on the concept of damage index,seismic damag investigation at 170 spots for five building types in Wenchuan earthquake(Ms8.0) is described in this paper.Mean damage indexes and variance are calculated for all building types in seismic intensity zone from Ⅵ to Ⅺ.Results show that the mean damage indexes are consistent with corresponding values in the Chinese seismic intensity scale for Ⅶ toⅩ intensity zones.Abnormity in Ⅵ intensity zone is caused by the distribution of survey spots,while abnormity in Ⅺ intesit zone may be influenced by the spots distribution and the determined intensity area.Damage index is high and strongly discrete and quickly decreases within 50 km to the fault,while it is weak and stable in farther area.The damage attenuation relationships for all building types are fitted by using log-log linear equation.At last,the damage index of brick-concrete building is compared with other four building types at same survey spot.The comparison shows that the aseismic performance difference is nonlinear at different damage degrees.
引文
[1]林旭川,潘鹏,叶列平,等.汶川地震中典型RC框架结构的震害仿真与分析[J].土木工程学报,2009,(5):21-28.
[2]叶乐平,陆新征,赵世春,等.框架结构地震倒塌能力的研究——汶川地震极震区几个框架结构震害案例的分析[J].建筑结构学报,2009,42(5):13-20.
[3]刘海卿,倪镇国,欧进萍.强震作用下砌体结构倒塌过程仿真分析[J].地震工程与工程振动,2008,28(5):38-42.
[4]Zhang M,Jin Y.Building damage in Dujiangyan during Wenchuan earthquake[J].Earthquake Engineering and Engineering Vibration,2008,7(3):263-269.
[5]He C R,Zhang R,Chen Qet al.Earthquake characteristics and building damage in high-intensity areas of Wenchuan earthquake I:Yingxiu town[J].Natural Harards,2010,55(1):1-17.
[6]孙景江,唐玉红,孙忠贤,等.汶川地震Ⅷ度和Ⅶ度区城市房屋震害及若干典型震害讨论[J].地震工程与工程振动,2009,29(6):65-73.
[7]熊力红,杜修力,陆鸣,等.5.12汶川地震中多层房屋典型震害规律研究[J].北京工业大学学报,2008,34(11):1166-1172.
[8]清华大学、西南交通大学、北京交通大学土木工程结构专家组.汶川地震建筑震害分析[J].建筑结构学报,2008,29(4):1-9.
[9]通海地震影响场调查组.通海地震的烈度分布与场地影响[C]//地震工程研究报告集.北京:科学出版社,1977.
[10]刁桂苓,蔡华昌,刁坚信,等.1998年张北6.2级地震宏观烈度[J].华北地震科学,2001,19(1):23-30.
[11]非明伦,崔建文,赵永庆,等.施甸地震震害分析[J].地震研究,2002,25(2):192-199.
[12]王锡财,崔建文,施伟华,等.施甸5.9级地震房屋震害分析[J].自然灾害学报,2002,11(1):74-80.
[13]施伟华,崔建文,包一峰,等.姚安6.5级地震场地与震害的关系[J].地震研究,2003,26(1):86-91.
[14]施伟华,陈坤华,李善,等.2007年宁洱6.4级地震的震害指数与烈度[J].地震研究,2007,30(4):379-383.
[15]李杰.与震害指数相联系的地震损失估计公式[J].世界地震工程,1992,8(1):45-47.
[16]刘良林,王全凤,林煌斌.基于震害指数地震灾害预测方法的可行性[J].江西科学,2007,25(3):330-333.
[17]郝敏,谢礼立,李伟.从集集地震看建筑物震害与地震动参数的关系[J].地震工程与工程振动,2005,25(6):12-15.
[18]彭小波,刘浪,李小军,等.汶川地震中震害指数和地震动相关性分析[A]//全国土木工程博士生学术论坛优秀论文集[C].长沙:中南大学出版社,2009:420-425.
[19]GB/T17742-1999中国地震烈度表[S].
[20]GB/T17742-2008中国地震烈度表[S].
[21]谷军明,缪升,杨海名.云南地区穿斗木结构抗震研究[J].工程抗震与加固改造,2005,27(s):205-210.
[22]王卫民,赵连锋,李娟,等.四川汶川8.0级地震震源过程[J].地球物理学部,2008,51(5):1403-1410.
[23]吕西林,程海江,卢文胜,等.两层轻型木结构足尺房屋模型模拟地震振动台试验研究[J].土木工程学报,2007,40(10):41-49.
[24]高孟潭,陈学良,俞言祥,等.汉源烈度异常机理的初步探讨[J].震害防御技术,2008,3(3):216-223.
[2]叶乐平,陆新征,赵世春,等.框架结构地震倒塌能力的研究——汶川地震极震区几个框架结构震害案例的分析[J].建筑结构学报,2009,42(5):13-20.
[3]刘海卿,倪镇国,欧进萍.强震作用下砌体结构倒塌过程仿真分析[J].地震工程与工程振动,2008,28(5):38-42.
[4]Zhang M,Jin Y.Building damage in Dujiangyan during Wenchuan earthquake[J].Earthquake Engineering and Engineering Vibration,2008,7(3):263-269.
[5]He C R,Zhang R,Chen Qet al.Earthquake characteristics and building damage in high-intensity areas of Wenchuan earthquake I:Yingxiu town[J].Natural Harards,2010,55(1):1-17.
[6]孙景江,唐玉红,孙忠贤,等.汶川地震Ⅷ度和Ⅶ度区城市房屋震害及若干典型震害讨论[J].地震工程与工程振动,2009,29(6):65-73.
[7]熊力红,杜修力,陆鸣,等.5.12汶川地震中多层房屋典型震害规律研究[J].北京工业大学学报,2008,34(11):1166-1172.
[8]清华大学、西南交通大学、北京交通大学土木工程结构专家组.汶川地震建筑震害分析[J].建筑结构学报,2008,29(4):1-9.
[9]通海地震影响场调查组.通海地震的烈度分布与场地影响[C]//地震工程研究报告集.北京:科学出版社,1977.
[10]刁桂苓,蔡华昌,刁坚信,等.1998年张北6.2级地震宏观烈度[J].华北地震科学,2001,19(1):23-30.
[11]非明伦,崔建文,赵永庆,等.施甸地震震害分析[J].地震研究,2002,25(2):192-199.
[12]王锡财,崔建文,施伟华,等.施甸5.9级地震房屋震害分析[J].自然灾害学报,2002,11(1):74-80.
[13]施伟华,崔建文,包一峰,等.姚安6.5级地震场地与震害的关系[J].地震研究,2003,26(1):86-91.
[14]施伟华,陈坤华,李善,等.2007年宁洱6.4级地震的震害指数与烈度[J].地震研究,2007,30(4):379-383.
[15]李杰.与震害指数相联系的地震损失估计公式[J].世界地震工程,1992,8(1):45-47.
[16]刘良林,王全凤,林煌斌.基于震害指数地震灾害预测方法的可行性[J].江西科学,2007,25(3):330-333.
[17]郝敏,谢礼立,李伟.从集集地震看建筑物震害与地震动参数的关系[J].地震工程与工程振动,2005,25(6):12-15.
[18]彭小波,刘浪,李小军,等.汶川地震中震害指数和地震动相关性分析[A]//全国土木工程博士生学术论坛优秀论文集[C].长沙:中南大学出版社,2009:420-425.
[19]GB/T17742-1999中国地震烈度表[S].
[20]GB/T17742-2008中国地震烈度表[S].
[21]谷军明,缪升,杨海名.云南地区穿斗木结构抗震研究[J].工程抗震与加固改造,2005,27(s):205-210.
[22]王卫民,赵连锋,李娟,等.四川汶川8.0级地震震源过程[J].地球物理学部,2008,51(5):1403-1410.
[23]吕西林,程海江,卢文胜,等.两层轻型木结构足尺房屋模型模拟地震振动台试验研究[J].土木工程学报,2007,40(10):41-49.
[24]高孟潭,陈学良,俞言祥,等.汉源烈度异常机理的初步探讨[J].震害防御技术,2008,3(3):216-223.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心