拱形结构爆炸作用荷载分布规律研究

›› 2012, Vol. 33 ›› Issue (11): 3407-3413.

拱形结构爆炸作用荷载分布规律研究

洪武^{1, 2}，周健南²，徐迎²，金丰年²，范华林^{3, 4}

1. 兰州交通大学甘肃省道路桥梁与地下工程重点实验室，兰州 730070；2. 解放军理工大学爆炸冲击防灾减灾国家重点实验室，南京 210007；3. 重庆交通大学（桥梁）结构工程重点实验室，重庆 400074；4. 河海大学岩土力学与堤坝工程教育部实验室，南京 210098

收稿日期:2012-07-14 出版日期:2012-11-12 发布日期:2012-11-14
通讯作者: 范华林，男，1974年生，博士，教授，研究方向为固体力学和防灾减灾与防护工程。E-mail: fhl02@mails.tsinghua.edu.cn E-mail: hw73331@126.com
作者简介:洪武，男，1980年生，博士研究生，研究方向为防灾减灾及防护工程
基金资助:
国家自然科学基金创新研究群体科学基金(No. 51021001)；国家自然科学基金(No. 51078351)；重庆交通大学（桥梁）结构工程重点实验室开放基金(No. CQSLBF-Z11-1)；甘肃省道路桥梁与地下工程重点实验室开放基金(No. Kfjj-11-03)；爆炸科学与技术国家重点实验室开放基金(No.KFJJ10-16)及岩土力学与堤坝工程教育部实验室（河海大学）开放基金(No. GH200905)资助项目。

Research on distribution laws of blast load on arch structure

HONG Wu^{1, 2}，ZHOU Jian-nan²，XU Ying²，JIN Feng-nian²，FAN Hua-lin^{3, 4}

1. Key Laboratory of Road & Bridge and Underground Engineering of Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070, China; 2. State Key Laboratory for Disaster Prevention & Mitigation of Explosion & Impact, PLA University of Science and Technology, Nanjing 210007, China; 3. Key Laboratory of Bridge-Structure Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 4. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China

Received:2012-07-14 Online:2012-11-12 Published:2012-11-14

摘要/Abstract

摘要： 采用数值计算方法对地下高边墙拱形结构在爆炸作用下爆炸荷载的分布规律进行了研究。研究结果表明，拱形部分荷载分布主要受爆高、跨度、观测点角度的影响，荷载分布形式是以拱顶为对称轴的马鞍形。爆高与跨度的比值越大，结构上的荷载分布越均匀，反之，则越集中；边墙部分荷载分布主要受爆高、跨度、边墙高度影响，从墙顶开始沿着墙体逐渐衰减，最终趋于均匀。在此基础上，给出了自由场地下大跨度拱形结构荷载的计算方法，并计算了拱形结构上的荷载系数，发现沿着拱形荷载系数并不是固定值，在拱顶最小，近似等于1.5，且随拱角的增加而变大。

关键词: 地下拱形结构, 爆炸荷载, 荷载分布规律, 荷载系数

Abstract: Distribution laws of blast loads on arch structure induced by underground explosions are studied by numerical method. The results show that the load distribution on arch is mainly effected by the explosion height, the arch span and the angle of monitoring point. The distribution form of load is shape of saddle as a symmetry axis around vault. Load distribution on the arch will be more uniform with the increase of the ratio of explosion distance and span. Conversely, it will be more concentrated. The load distribution on side-wall is mainly effected by the explosion height, the arch span and the side-wall height; and it reduces gradually from wall tip along the wall, finally tends to even distribution. On this basis, a method to calculating load on arch structure with large span is proposed. After calculating the load factor on arch structure, it is found that the load factor around the arch is not a constant value and increases with the increase of arch angle. The minimum value of the factor appears at the vault and it equals to 1.5.

Key words: underground arch structure, blast load, load distribution law, load factor

中图分类号:

O 389

洪武，周健南，徐迎，金丰年，范华林 . 拱形结构爆炸作用荷载分布规律研究[J]. , 2012, 33(11): 3407-3413.

HONG Wu ，ZHOU Jian-nan ，XU Ying ，JIN Feng-nian ，FAN Hua-lin . Research on distribution laws of blast load on arch structure[J]. , 2012, 33(11): 3407-3413.

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