地震研究

2022年四川省甘孜州泸定县发生6.8级地震。依据现场调查资料,介绍了震区房屋的主要结构类型及其建造特点,总结了各类房屋结构的典型震害现象,探讨了各类房屋典型震害特征的产生机理。通过震害数据的统计分析,建立了本次地震中各类结构房屋的震害矩阵,并与其他学者的研究成果进行了对比,研究了不同房屋类型各地震破坏等级分布规律,给出了砖混结构房屋的地震易损性曲线。根据本次地震的震害特点,给出了提升房屋抗震能力的建议。

At 12:52 on September 5,2022,a 6.8-magnitude earthquake occurred in Luding County,Ganzi Prefecture of Sichuan Province.Based on the field investigation data in the disaster area,the main structural types and characteristics of the buildings in the area are summarized.The typical seismic damage to each type of buildings is introduced,and the causes which lead to the damage are analyzed.Through the statistics of damage data,the seismic damage matrix of various types of structures in this earthquake-disaster area is established.By comparing with the previous research results in the related field,the distribution characteristics of each damage grade of various types of buildings are analyzed.The seismic fragility curve of the masonry building is established.Finally,according to the damage characteristics of buildings in the disaster area,some suggestions for improving the earthquake resistance of buildings in the disaster area are presented.

引言
1 房屋震害及原因分析
2 房屋震害矩阵及易损性分析
3 结论

图1 框架结构典型震害现象<br/>Fig.1 Typical seismic failure of RC frame structures

图1 框架结构典型震害现象
Fig.1 Typical seismic failure of RC frame structures

图2 砖混结构房屋典型地震破坏<br/>Fig.2 Typical seismic failure of masonry structures

图2 砖混结构房屋典型地震破坏
Fig.2 Typical seismic failure of masonry structures

图3 典型木结构房屋震害照片<br/>Fig.3 Typical seismic failure of timber houses

图3 典型木结构房屋震害照片
Fig.3 Typical seismic failure of timber houses

图4 砖(石)木房屋典型震害<br/>Fig.4 Typical seismic failure of masonry and wood structure buildings

图4 砖(石)木房屋典型震害
Fig.4 Typical seismic failure of masonry and wood structure buildings

表1 泸定地震砖混结构房屋震害矩阵(%)<br/>Tab.1 Seismic damage matrix of masonry buildings in the Luding earthquake-affected area

表1 泸定地震砖混结构房屋震害矩阵(%)
Tab.1 Seismic damage matrix of masonry buildings in the Luding earthquake-affected area

图5 砖混结构震害矩阵对比<br/>Fig.5 Comparison of seismic damage matrices of masonry buildings provided by different researchers

图5 砖混结构震害矩阵对比
Fig.5 Comparison of seismic damage matrices of masonry buildings provided by different researchers

图6 砖混结构地震易损性曲线<br/>Fig.6 Seismic fragility curves of masonry structures

图6 砖混结构地震易损性曲线
Fig.6 Seismic fragility curves of masonry structures

表2 泸定地震其他类型房屋震害矩阵<br/>Tab.2 Damage statistics matrix of other types of buildings in Luding earthquake-affected area[JZ)] %

表2 泸定地震其他类型房屋震害矩阵
Tab.2 Damage statistics matrix of other types of buildings in Luding earthquake-affected area[JZ)] %

图7 其他类型房屋震害统计结果对比<br/>Fig.7 Comparison between the statistical results of other types of buildings

图7 其他类型房屋震害统计结果对比
Fig.7 Comparison between the statistical results of other types of buildings

董孝曜,郭迅,罗若帆,等.2023.泸定6.8级地震震害调查及结构受力分析[J].建筑结构学报,44(S2):11-19.
Dong X Y,Guo X,Luo R F.2023.Seismic damage investigation and structural force analysis of Luding MS6.8 earthquake[J].Journal of Building Structures,44(S2):11-19.(in Chinese)
费扬,陈龙伟.2023.基于OpenSees的场地条件对RC框架结构易损性影响初探[J].建筑结构,53(S2):724-729.
Fei Y,Chen L W.2023.Analysis of the influence of site conditions on the fragility of RC frame structures based on OpenSees program[J].Building Structure,53(S2):724-729.(in Chinese)
李建亮,王世元,李福海.2023.基于震害资料的川西农居地震易损性研究[J].震灾防御技术,18(4):780-789.
Li J L,Wang S Y,Li F H.2013.Study on the seismic vulnerability of Western Sichuan rural buildings based on seismic damage data[J].Technology for Earthquake Disaster Prevention,18(4):780-789.(in Chinese)
潘毅,袁家聪,林拥军,等.2023.泸定6.8级地震农村居住建筑震害调查与分析[J].防灾减灾工程学报,43(6):1200-1214.
Pan Y,Yuan J C,Lin Y J.et al.2023.Seismic damage investigation and analysis of rural residential buildings in MS6.8 Luding Earthquake[J].Journal of Disaster Prevention and Mitigation Engineering,43(6):1200-1214.(in Chinese)
彭志桢,吴小宾,潘毅,等.2024.泸定6.8级地震城镇居住建筑典型震害及启示[J].建筑结构,54(7):13-20.
Peng Z Z,Wu X B,Pan Y.et al.Typical seismic damage of urban residential buildings in MS6.8 Luding earthquake and its enlightenment[J].Building Structure,54(7):13-20.(in Chinese)
孙柏涛,张桂欣.2012.汶川8.0级地震中各类建筑结构地震易损性统计分析[J].土木工程学报,45(5):26-30.
Sun B T,Zhang G X.2012.Statistical analysis of the seismie vulnerability of various types of building structures in Wenchuan M8.0 earthquake[J].China Civil Eengineering Journal,45(5):26-30.(in Chinese)
杨晓鑫,杨建荣,车文庆,等.2017.云南省不同烈度区内房屋建筑震害易损性对比研究[J].价值工程,36(12):229-232.
Yang X X,Yang J R,Che W Q,et al.2017.Seismic vulnerability study of buildings in different enforcing zones in Yunnan Province[J].Value Engineering,36(12):229-232.(in Chinese)
张莹,郭红梅,尹文刚,等.2024.川南地区砖混结构房屋典型震害及地震易损性研究[J].地震工程学报,46(2):358-368.
Zhang Y,Guo H M,Yin W G,et al.2024.Typical damage and seismic vulnerability of brick-concrete structural buildings in south Sichuan[J].China Earthquake Engineering Journal,46(2):358-368.(in Chinese)
郑山锁,马德龙,刘洪珠.2015.汶川地区震后钢筋混凝土框架结构的地震易损性研究[J].地震工程学报,37(1):131-137.
Zheng S S,Ma D L,Liu H Z.2015.Seismic vulnerability of post earthquake reinforced concrete frame structures in the Wenchuan area[J].China Earthquake Engineering Journal,37(1):131-137.(in Chinese)
GB 50011—2010,建筑抗震设计规范[S].
GB 50011—2010,Code for seismic design of buildings[S].(in Chinese)

备注

引言

1 房屋震害及原因分析

2 房屋震害矩阵及易损性分析

3 结论

期刊信息