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8月12日,在九寨沟县举行的四川九寨沟7.0级地震烈度图新闻发布会上,中国地震局工程力学研究所研究员林均岐谈到了目前当地建筑安全问题。
四川在线消息(记者熊筱伟付真卿摄影华小峰)
记者:此次地震烈度不小,但为何建筑整体垮塌的情况很少发生?此外震后老百姓住房是否安全?
林均岐:很少垮塌的原因,要从两方面看:建筑物本身、地震情况。
建筑物本身的话有三句话:抗震设防水平较高。根据相关规定,九寨沟及周边的设防水平和烈度是8度,是按8度设防进行建筑设计和施工的,设防水平较高;特别是汶川后的房屋严格按这个标准进行,所以抗震性能高;结构选型合理,看城镇,房屋大部分选用的是钢筋混凝土框架结构,抗震性能好。看农村,多是穿斗木构架房屋的传统民居,在多次地震中国年表现良好,这次也不例外;组织管理到位,政府做了很多工作,特别是对村镇房屋的建筑设计、施工、培训、宣传教育各方面都是做了很多工作,取得很好成效。
从地震方面看,震源深度是20千米,比玉树、芦山等地震深度都要深,地震能量从震源出发传播到地面的距离长了,能量衰减大,破坏力就相对小。
至于地震后老百姓关心的住房安全问题,这次地震中房屋抗震性能良好,大部分房屋没有在地震中受到破坏,完全可以正常使用;对被破坏严重的房屋,这类房屋严禁使用,还禁止靠近和进入,以免带来伤害。还有一种受损了,但是判断不了能否使用,当地政府在对房屋安全性进行鉴定,一栋栋房屋进行,可以根据结论进行判断能否住。
责任编辑:任冲 CN062
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