[1]高 亮,刘维维,陶 磊,等.电力构筑物缓冲垫层的落石冲击试验及结构的冲击响应[J].山地学报,2018,(03):401-410.[doi:10.16089/j.cnki.1008-2786.000336]
　GAO Liang,LIU Weiwei,TAO Lei,et al.Response of Power Structure Equipped with Buffer Cushion to Experimental Rockfall Impact[J].Mountain Research,2018,(03):401-410.[doi:10.16089/j.cnki.1008-2786.000336]
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电力构筑物缓冲垫层的落石冲击试验及结构的冲击响应()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2018年03期
页码:
401-410
栏目:
山地灾害
出版日期:
2018-05-30

文章信息/Info

Title:
Response of Power Structure Equipped with Buffer Cushion to Experimental Rockfall Impact
文章编号:
1008-2786-(2018)3-401-10
作者:
高 亮; 刘维维; 陶 磊; 张俊发
西安理工大学 土木建筑工程学院,西安 710048
Author(s):
GAO Liang;  LIU Weiwei;  TAO Lei;  ZHANG Junfa
School of Civil Engineering and Architecture, Xi'an University of Technology, Xi'an 710048, China
关键词:
落石冲击作用;  动态冲击试验;  缓冲垫层;  冲击荷载模型;  动力响应
Keywords:
rockfall impact;  dynamic impact test;  buffering cushion;  impact loading model;  dynamic response
分类号:
X43; TV32
DOI:
10.16089/j.cnki.1008-2786.000336
文献标志码:
A
摘要:
针对水电站落石灾害问题,通过将土垫层及S型钢、彩钢板作为防护结构进行落石冲击试验,探讨其缓冲耗能规律,并提出冲击荷载模型,通过有限元模拟冲击作用力并加载至某出线楼顶层,研究结构屋顶和设备层典型位置的动力响应。结果显示:加速度和冲击力随时间变化曲线基本呈三角形脉冲; 土垫层的缓冲性能随着垫层厚度的增加而增加,冲击作用持续时间接近0.03 s; S型钢具有良好的缓冲性能,可用于构筑物侧墙的防护; 提出S型钢+彩钢板缓冲防护体系,其冲击持续时间约为0.04 s; 随垫层厚度的增加,结构动力响应的幅值明显下降; 并对不同落石高度及土垫层厚度条件下该出线楼内电气设备振动情况进行了评价。研究结论可为后期工程结构落石灾害的防护设计提供参考。
Abstract:
In view of the issues of rockfall disasters occurring at hydropower stations, the rockfall impact tests were conducted for examination of rockfall barrier structures, such as soil cushions, S-shaped steel and color steel plate.The tests were designed to investigate the buffer energy dissipation law, and consequently proposed an effective impact load model of the barrier structures.In the finite element simulation, it applied the impact force to the top floor of a certain outlet-building to study the dynamic responses of the key positions, the structural roof and the equipment floor.Results showed that the acceleration and impact force changed with time, basically a shape of triangular pulse.The buffering capacity of the soil cushion increased with the increase of cushion thickness, and the impact duration was close to 0.03s.S-shaped steel had good buffering performance and it could be used for shielding side walls of structures from rockfalls.S-shaped steel worked well with color steel plate as a buffering protection system, exhibiting a favorable quality, with an impact duration of 0.04 s aboutd.As the thickness of a cushion increased, the amplitude of the structural dynamic response decreased significantly.The vibration of the electrical equipment in the outlet-building hit by rockfalls at different heights were evaluated in terms of varied soil cushion thicknesses.Research conclusions can provide reference for protection design of power structures threated by rockfalls in the later stage.

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备注/Memo

备注/Memo:
收稿日期(Received date):2017-2-21; 改回日期(Accepted date):2017-2-24
基金项目(Foundation item):陕西省自然科学基础研究计划项目(2018JQ5081); 陕西省教育厅科学研究计划专项项目(17JK0567); 国家自然科学基金项目(51279162)。[National Natural Science Foundation of Shaanxi Province(2018JQ5081); Science Research Program of Education Department of Shaanxi Province(17JK0567); National Natural Science Foundation of China(51279162)]
第一作者(Biography)及通讯作者(Corresponding author):高亮(1984-),女,陕西榆林人,工学博士,讲师,主要研究方向:工程结构抗风及制振、落石冲击研究。 [GAO Liang(1984-), female, Ph.D., lecturer, specialized in structural wind engineering and rockfall impaction] E-mail: 156820773@qq.com
更新日期/Last Update: 2018-05-30