地震研究

根据2007年6月3日宁洱6.4级地震现场调查结果,对破坏较严重的土坯房建立了地震分析模型。对不同的开间、进深及檐口高的房屋,输入了3类场地超越概率为63%及超越概率为3%的地震波进行了有限元抗震分析。结果表明:墙厚影响不大,墙高的影响较大,墙高增加,破坏性增加; 因此建议在满足使用功能的前提下,不增加墙厚,而减少层高对抗震更为有利,最后提出了相应的抗震加固措施。

Based on the site investigation of Ning'er M6.4 earthquake on Jun.3,2007,we construct the earthquake analysis models for the severe damaged adobe houses.Using finite element method,we analyze aseismic of civil structure houses in different bays,depths and eaves heights when inputting 3 kinds of seismic waves are modeled by exceedance probability of 63% and 3% within 50 years respectively.The results show that the storey height has a greater influence than wall thickness on the aseismic of civil structure houses.The higher of storey height,the more of ruinous cracks occurred.We suggest that reducing the storey height and maintaining the basic wall thickness has more advantage to aseismic for the civil structure house under the prerequisite tosatisfy and propose the measure of anti-seismic reinforcement.

引言
1 土坯结构特点及破坏情况〖*3〗
2 计算模型及参数
3 计算结果分析
4 承重墙的高厚比
5 结论及建议

图1 宁洱6.4级地震土坯墙承重结构破坏图<br/>Fig.1 Load-bearing structure damage of adobe wall in Ning'er MS6.4 earthquake

图1 宁洱6.4级地震土坯墙承重结构破坏图
Fig.1 Load-bearing structure damage of adobe wall in Ning'er MS6.4 earthquake

表1 土坯房破坏程度判别标准<br/>Tab.1 Discrimination standard of damage degree

表1 土坯房破坏程度判别标准
Tab.1 Discrimination standard of damage degree

表2 不同墙厚对应的应力及位移<br/>Tab.2 Stress and displacement of the different wall thicknesses

表2 不同墙厚对应的应力及位移
Tab.2 Stress and displacement of the different wall thicknesses

图2 小震作用下主拉应力分布图<br/>Fig.2 Principal tensile stress distribution under earthquakes of 63% exceeding probability in 50 years

图2 小震作用下主拉应力分布图
Fig.2 Principal tensile stress distribution under earthquakes of 63% exceeding probability in 50 years

图3 墙高与最大主拉应力关系曲线(单位:kPa)<br/>Fig.3 Relation curve between the wall height and the maximum principal tensile stress(unit:kPa)

图3 墙高与最大主拉应力关系曲线(单位:kPa)
Fig.3 Relation curve between the wall height and the maximum principal tensile stress(unit:kPa)

表3 不同墙高对应的最大主拉应力<br/>Tab.3 Maximum principal tensile stress

表3 不同墙高对应的最大主拉应力
Tab.3 Maximum principal tensile stress

图4 大震下考虑空间作用的主拉应力图<br/>Fig.4 Principal tensile stress under earthquakes of 3% exceeding probability in 50 years

图4 大震下考虑空间作用的主拉应力图
Fig.4 Principal tensile stress under earthquakes of 3% exceeding probability in 50 years

表4 不同墙高对应的最大剪应力<br/>Tab.4 Maximum shear stress of different wall heights

表4 不同墙高对应的最大剪应力
Tab.4 Maximum shear stress of different wall heights

图5 大震下考虑空间作用的剪应力图<br/>Fig.5 Shear stress under earthquakes of 3% exceeding probability in 50 years considering the space effect

图5 大震下考虑空间作用的剪应力图
Fig.5 Shear stress under earthquakes of 3% exceeding probability in 50 years considering the space effect

表5 小震作用下不同墙高对应的最大位移<br/>Tab.5 Maximum displacements of different wall height under

表5 小震作用下不同墙高对应的最大位移
Tab.5 Maximum displacements of different wall height under

表6 大震作用下不同墙高对应的最大位移<br/>Tab.6 Maximum displacements of different wall height under

表6 大震作用下不同墙高对应的最大位移
Tab.6 Maximum displacements of different wall height under

图6 大震作用下的位移等值线图<br/>Fig.6 Contour of displacement under earthquakes of 3% exceeding probability in 50 years

图6 大震作用下的位移等值线图
Fig.6 Contour of displacement under earthquakes of 3% exceeding probability in 50 years

陈伟,孟丽军,段树金.2005.农村建筑抗震调查的综合分析[J].山西建筑,31(9):43-44.
高惠瑛,张铁军,黄声明,等.2010.福建省农村房屋抗震性能调查与现状分析[J].灾害学,25(增刊):243-247.
郭阳照,黄慧敏,郭永恒.2006.“7·22”云南盐津地震房屋震害分析[J].震害防御技术,1(4):353-358.
何超,罗奇峰.2010.山东西北部某县农村房屋抗震性能分析[J].结构工程师,26(1):50-55.
卢永坤,周光全,郑定昌,等.2007.昆明市“城中村”民房抗震能力调查[J].地震研究,30(1):72-76.
王俊特.2009.从汶川震害浅谈我省闽南农村地区砌体房屋结构的抗震能力[J].福建建筑,(7):52-53.
杨向东,安晓文.2001.姚安6.5 级地震中房屋震害差异的原因分析[J].地震研究,24(2):156-161.
曾耀辉.2010.关于提高农村土木房屋抗震能力的思考[J].安徽农业科技,(16):8 809-8 810.
GB50003-2001,砌体结构设计规范[S].

备注

引言

1 土坯结构特点及破坏情况〖*3〗

2 计算模型及参数

3 计算结果分析

4 承重墙的高厚比

5 结论及建议

期刊信息