钢混建筑物落石碰撞的易损性定量评价  

Quantitative assessment of vulnerability of RC buildings by rockfalls impact

作　　者：张傲[1] 唐朝晖[2] 柴波[2] 黄璇[3] 

机构地区：[1]中国地质调查局武汉地质调查中心,湖北武汉430074 [2]中国地质大学(武汉)工程学院,湖北武汉430074 [3]湖北省交通规划设计院,湖北武汉430074

出　　处：《合肥工业大学学报（自然科学版）》2016年第2期217-222,共6页Journal of Hefei University of Technology：Natural Science

基　　金：国家地质矿产调查评价专项工作资助项目(1212011120028);沿长江重大工程区地质环境综合调查(中游)资助项目(12120115044101);国家矿山地质环境治理专项重点工程资助项目

摘　　要：为评价钢混建筑物落石碰撞的易损性,文章提出力学机理明晰的易损性定量方法。以广西凤山市4号矿山坡脚4层钢混建筑物为实例,考虑落石速度、大小和轨迹,分析不同条件落石的碰撞概率;采用SAP2000建立建筑物有限元模型,进行建筑物抗倒塌模拟;结合建筑物物理与经济损伤指数之间的相关性,计算易损性定量评价矩阵。结果表明：该钢混建筑物易损性值为0-1,对直径3.4m以上的落石较为敏感,易受其高度破坏;易损性指数与落石速度和大小有关,落石低速时即使体积再大也不可能造成建筑物高度损伤,高速时即使体积微小也足以造成高度损伤。钢混建筑物易损性评价矩阵的精确得出,说明该方法应用灵活,突破了传统统计方法的诸多局限性,能够作为建筑物进一步风险研究的定量化依据。For evaluating the vulnerability of reinforced concrete（RC） buildings by rockfalls impact, a quantitative method is proposed with clear mechanical mechanism. Taking a four-story steeloconcrete building as an example, which is located in the toe of the No. 4 mine in Fengshan County of Guangxi, and considering the speed, size and trajectory of rockfalls, the probability of rockfalls impact is analyzed. The finite element model of the building is established by using the SAP2000 software, and the anti-collapse of the building is simulated. The quantitative vulnerability assessment matrix is calculated based on the correlation between the physical and economic damage indexes of the building. The results show that the vulnerability value of the building is 0 to 1, and the building is sensitive to the rockfalls of diameter above 3.4 m which can cause high intensity damage. The vulnerability index is related to the speed and size of the roekfalls. For low velocities, even rockfalls of large volume can not cause high damage, and for high velocities, even rockfalls of small volume are sufficient to cause very high damage. The quantitative vulnerability assessment matrix is accurately calculated. It is indicated that this method is feasible and breaks the limitations of traditional statistical methods, and the result can be the quantitative foundation for the further building risk research.

关 键 词：落石 SAP2000软件 钢混建筑物 抗倒塌模拟 易损性定量评价矩阵 

分 类 号：TU375.402[建筑科学—结构工程]