| 江苏高邮、宝应MS4.9级地震现场震害调查与破坏原因研究 |
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| 摘要： 江苏高邮、宝应MS4.9级地震在极震区造成了数10间农村民居不同程度和不同方式的破坏，出现人员伤亡。震后对地震灾害现场进行震害调查与破坏原因研究，典型的震害特征包括砖砌体、砖木和砖混结构房屋局部倾倒、墙体贯通开裂、房顶瓦片掀翻和烟囱倒塌等。农村民居遭到破坏的主要因素包括：选址不当、施工质量较差、砂浆强度不够、缺少圈梁和构造柱等。同时，分析了竖向地震作用和鞭梢效应等地震效应，讨论了砖砌体和砖混结构抗震设计的加固方法和改善抗震性能的构造措施等，为农村民居的抗震设防和减轻震害损失等提供参考。 |
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| 关 键 词：高邮、宝应MS4.9级地震 震害调查 破坏原因 竖向地震作用 鞭梢效应 |
| DOI：10.11899/zzfy20130307 |
| 基金项目：国家自然科学基金青年科学基金项目（51208234）；中国地震局地震科技星火计划青年项目（XH12021Y） |
| 收稿日期：2013-03-28 |
| 作者简介：洪海春，男，生于1977年。博士，高级工程师。主要从事地震岩土工程、地震灾害预防和地震应急救援方面的研究。 E-mail：haichunhong@126.com |
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| Field Investigation and Research on Damage Cause of Gaoyou-Baoying MS4.9 Earthquake in Jiangsu Province |
| Abstract： 2012 Gaoyou-Baoying MS4.9 earthquake in Jiangsu province caused various damages involving tens of rural buildings, and seismic casualty is appeared in meizoseismic area. Based on the field investigation and research on damage post-earthquake, we found that the typical damage characteristics mainly includes local collapse of brick masonry, brick wood and brick concrete structure, through fracture of wall，tiles of roof tilting, and chimney collapse. The main factors causing the damage of the rural buildings are improper construction site, poor qualities of the buildings, inadequate mortar strength, and lack of ring beam and constructional column. Meanwhile, the seismic effect of vertical seismic action and whipping effect are analyzed. Both seismic design reinforced methods of brick masonry and concrete structure and constitution in order to improve anti-seismic capacity for rural buildings are discussed. Finally, our results can offer reference to the earthquake fortification and the reduction of damage loss. |
| Keywords： Gaoyou-Baoying MS4.9 earthquake Field damage investigation Damage cause Vertical seismic action Whipping effect |
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