|Table of Contents|

Impact signal dynamic characteristics of energy dissipation shed tunnel(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2019年05期
Page:
33-41
Research Field:
道路与铁道工程
Publishing date:

Info

Title:
Impact signal dynamic characteristics of energy dissipation shed tunnel
Author(s):
WANG Lin-feng1;  ZHU Hong-zhou2;  SONG Nan-nan1;  ZOU Zheng1;  YAO Chang-yin1
(1. School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 2. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China)
Keywords:
tunnel engineering;  energy dissipation shed tunnel;  rockfall impact test;  time-frequency analysis;  wavelet analysis;  energy characteristic
PACS:
U453.1
DOI:
-
Abstract:
Considering the rockfall falling height, mass, shape and cushion thickness, the impact signal dynamic characteristics of energy dissipation shed tunnel were studied by the indoor model test. The spectrums and autocorrelation curves of impact signal were obtained. The time-frequency characteristics of impact signal and the vibration frequency and its change law corresponding to the maximum spectrum were analyzed, and the impact signal of each frequency band was extracted based on the wavelet analysis method. The main energy distribution range of impact signal was obtained. Research result shows that the spectrum magnitude of impact signal at the center of shed tunnel roof increases as the rockfall falling height increases, and this spectrum of impact signal has four peaks with a symmetric distribution. When rockfalls with different shapes impact the shed tunnel, the order of spectrum magnitudes of impact signals from big to small is spherical, cuboid, cube and cylindrical. The thicker the ordinary shed tunnel roof cushion and the smaller the rockfall mass, the smaller the spectrum magnitude of impact signal at the center of shed tunnel roof. When a 5 kg spherical rockfall falls from the height of 0.5 m to impact the shed tunnel without cushion at the top, the maximum spectrum of impact signal of energy dissipation shed tunnel and the peak of autocorrelation curves are 60.98% and 82.57% lower than those of ordinary shed tunnel, respectively. When a 5 kg spherical rockfall falls from the height of 2.0 m to impact the shed tunnel without cushion at the top, the rockfall impact energy of energy dissipation shed tunnel mainly distributes in the frequency range of impact signal from 15.625 to 62.500 Hz, accounting for 63.73% of total energy. The rockfall impact energy of ordinary shed tunnel mainly distributes in the frequency range of impact signal from 0 to 15.625 Hz, accounting for 74.30% of total energy.Thus, the medium-frequency impact should be considered priorly when designing an energy dissipation shed tunnel, and the low-frequency impact should be considered priorly when designing an ordinary shed tunnel. 5 tabs, 14 figs, 30 refs.

References:

[1] 王玉锁,李俊杰,李正辉,等.落石冲击力评定的离散元颗粒流数值模拟[J].西南交通大学学报,2016,51(1):22-29.
WANG Yu-suo, LI Jun-jie, LI Zheng-hui, et al. Assessment of rockfall impact force by particle flow code numerical simulation based on discrete element model[J]. Southwest Jiaotong University, 2016, 51(1): 22-29.(in Chinese)
[2] 王林峰,姚昌银,邹 政,等.基于离散元方法的落石冲击力变化规律研究[J].铁道建筑,2017(6):101-105.
WANG Lin-feng, YAO Chang-yin, ZOU Zheng, et al. Study on change law of rockfall impact force based on discrete element method[J]. Railway Engineering, 2017(6): 101-105.(in Chinese)
[3] EFFEINDZOUROU A, THOENI K, GIACOMINI A, et al. Efficient discrete modelling of composite structures for rockfall protection[J]. Computers and Geotechnics, 2017, 87: 99-114.
[4] 袁进科,黄润秋,裴向军.滚石冲击力测试研究[J].岩土力学,2014,35(1):48-54.
YUAN Jin-ke, HUANG Run-qiu, PEI Xiang-jun. Test research on rockfall impact force[J]. Rock and Soil Mechanics, 2014, 35(1): 48-54.(in Chinese)
[5] 王林峰,刘 丽,唐 芬,等.基于落石棚洞冲击试验的落石冲击力研究[J].防灾减灾工程学报,2018,38(6):973-979.
WANG Lin-feng, LIU Li, TANG Fen, et al. Study on impact force of rockfall impact experiment on shed tunnel[J]. Journal of Disaster Prevent and Mitigation Engineering, 2018, 38(6): 973-979.(in Chinese)
[6] 王永东,周天跃,柴伦磊,等.基于能量分析的落石对棚洞垫层冲击力学研究[J].地下空间与工程学报,2018,14(增1):148-153.
WANG Yong-dong, ZHOU Tian-yue, CHAI Lun-lei, et al. Impact mechanics of rock-fall to shed cushion based on energy analysis[J]. Chinese Journal of Underground Space and Engineering, 2018, 14(S1): 148-153.(in Chinese)
[7] VENTURA A, DE BIAGI V, CHIAIA B. Effects of rockfall on an elastic-plastic member: a novel compliance contact model and dynamic response[J]. Engineering Structures, 2017, 148: 126-144.
[8] LI Li-ping, SUN Shang-qu, LI Shu-cai, et al. Coefficient of restitution and kinetic energy loss of rockfall impacts[J]. Journal of Civil Engineering, 2016, 20(6): 2297-2307.
[9] CALVETTI F, DI PRISCO C. Rockfall impacts on sheltering tunnels: real-scale experiments[J]. Géotechnique, 2012, 62(10): 865-876.
[10] 王 爽,周晓军,罗福君,等.拱形棚洞受落石冲击的模型试验研究[J].振动与冲击,2017,36(12):215-222.
WANG Shuang, ZHOU Xiao-jun, LUO Fu-jun, et al. An experimental study on the performance of an arch shaped shed tunnel due to the impact of rockfall[J]. Journal of Vibration and Shock, 2017, 36(12): 215-222.(in Chinese)
[11] 闫帅星,何思明,李新坡.滚石冲击作用下钢筋混凝土棚洞板动力学响应及冲切损伤评估研究[J].兰州大学学报(自然科学版),2019,55(1):64-72.
YAN Shuai-xing, HE Si-ming, LI Xin-po. Dynamic responses and punching damage assessment of a reinforced concrete slab impacted by rock-falls[J]. Journal of Lanzhou University(Natural Science), 2019, 55(1): 64-72.(in Chinese)
[12] 王玉锁,周 良,李正辉,等.落石冲击下单压式拱形明洞的力学响应[J].西南交通大学学报,2017,52(3):505-515.
WANG Yu-suo, ZHOU Liang, LI Zheng-hui, et al. Mechanical responses of single-pressure arch-shaped open tunnel structure under rockfall impaction[J]. Journal of Southwest Jiaotong University, 2017, 52(3): 505-515.(in Chinese)
[13] 王 琦,王玉锁,耿 萍.橡胶缓冲垫层保护下棚洞结构落石冲击力学响应研究[J].铁道建筑,2017(2):64-67.
WANG Qi, WANG Yu-suo, GENG Ping. Research on mechanical response of tunnel shed with protective rubber cushion subjected to impact of rockfall[J]. Railway Engineering, 2017(2): 64-67.(in Chinese)
[14] BHATTI A Q, KISHI N. Impact response of RC rock-shed girder with sand cushion under falling load[J]. Nuclear Engineering and Design, 2010, 240(10): 2626-2632.
[15] BHATTI A Q. Falling-weight impact response for prototype RC type rockshed with sand cushion[J]. Materials and Structures, 2015, 48(10): 3367-3375.
[16] DELHOMME F, MOMMESSIN M, MOUGIN J P, et al. Damage mechanisms of a reinforced concrete rock-shed slab impacted by blocks[J]. Journal of Structural Engineering, 2007, 133(10): 1426-1433.
[17] 王林峰,唐红梅,陈洪凯.消能棚洞的落石冲击计算及消能效果研究[J].中国铁道科学,2012,33(5):40-46.
WANG Lin-feng, TANG Hong-mei, CHEN Hong-kai. Study on the calculation method for rockfall impact and energy dissipation effect of energy dissipation shed tunnel[J]. China Railway Science, 2012, 33(5): 40-46.(in Chinese)
[18] 何思明,吴 永.新型耗能减震滚石棚洞作用机制研究[J].岩石力学与工程学报,2010,29(5):926-932.
HE Si-ming, WU Yong. Research on cushioning mechanism of new-typed energy dissipative rock shed[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(5): 926-932.(in Chinese)
[19] 王东坡,何思明,欧阳朝军,等.滚石冲击荷载下棚洞钢筋混凝土板动力响应研究[J].岩土力学,2013,34(3):881-886.
WANG Dong-po, HE Si-ming, OUYANG Chao-jun, et al. Study of dynamic response of shed reinforced concrete slab to impact load of rock-fall[J]. Rock and Soil Mechanics, 2013, 34(3): 881-886.(in Chinese)
[20] 王东坡,黄畇坤,何思明,等.波纹圆管状金属耗能器在棚洞工程中的耗能机理研究[J].工程科学与技术,2018,50(3):193-200.
WANG Dong-po, HUANG Yun-kun, HE Si-ming, et al. Energy dissipation mechanism of corrugated cylinder metal energy dissipator in rock shed engineering[J]. Advanced Engineering Sciences, 2018, 50(3): 193-200.(in Chinese)
[21] 陈 俊,丁 杰,闫 兵,等.子系统参数对双层隔振系统隔振特性的影响[J].交通运输工程学报,2018,18(3):114-128.
CHEN Jun, DING Jie, YAN Bing, et al. Effect of subsystem parameters on vibration isolation characteristics of two-stage vibration isolation system[J]. Journal of Traffic and Transportation Engineering, 2018, 18(3): 114-128.(in Chinese)
[22] 刘成清,倪向勇,杨万理,等.基于能量法的被动柔性棚洞防护结构设计理论[J].工程力学,2016,33(11):95-104.
LIU Cheng-qing, NI Xiang-yong, YANG Wan-li, et al.Design theory for passive flexible shield structures based on energy method[J]. Engineering Mechanics, 2016, 33(11): 95-104.(in Chinese)
[23] 汪 敏,石少卿,刘盈丰,等.防落石柔性棚洞的耗能性能分析及优化设计[J].振动与冲击,2018,37(1):216-222.
WANG Min, SHI Shao-qing, LIU Ying-feng, et al. Energy dissipation analysis and optimum design on a flexible rock-shed for rockfall protection[J]. Journal of Vibration and Shock, 2018, 37(1): 216-222.(in Chinese)
[24] 杨建荣,白 羽,杨晓东,等.柔性棚洞结构落石冲击数值模拟与试验研究[J].振动与冲击,2017,36(9):172-178,264.
YANG Jian-rong, BAI Yu, YANG Xiao-dong, et al. Numerical simulation and tests for flexible rock shed subjected to rackfall impact[J]. Journal of Vibration and Shock, 2017, 36(9): 172-178, 264.(in Chinese)
[25] 汪 敏,石少卿,崔廉明,等.三开间单跨柔性棚洞在落石冲击作用下的试验研究[J].土木工程学报,2018,51(5):37-47.
WANG Min, SHI Shao-qing, CUI Lian-ming, et al. Experimental investigation on three-bay and single-span flexible rock-shed under impact of rockfall[J]. China Civil Engineering Journal, 2018, 51(5): 37-47.(in Chinese)
[26] 王静峰,赵 鹏,袁 松,等.复合垫层钢棚洞抵抗落石冲击性能研究[J].土木工程学报,2018,51(增2):7-13.
WANG Jing-feng, ZHAO Peng, YUAN Song, et al. Numerical study on impact resistance of steel shed gallery with composite cushion[J]. China Civil Engineering Journal, 2018, 51(S2): 7-13.(in Chinese)
[27] 宋 跃,姜元俊,王 萌.碎石垫层对碎屑流冲击棚洞的缓冲效应研究[J].岩石力学与工程学报,2018,37(10):2359-2369.
SONG Yue, JIANG Yuan-jun, WANG Meng. Buffering effect of gravel cushion layer on the impact of dry granular flow against a rock shed[J]. Chinese Journal of Rock Mechanics and Engineering, 2018, 37(10): 2359-2369.(in Chinese)
[28] 裴向军,刘 洋,王东坡.滚石冲击棚洞砂土垫层耗能缓冲机理研究[J].四川大学学报(工程科学版),2016,48(1):15-22.
PEI Xiang-jun, LIU Yang, WANG Dong-po. Study on the energy dissipation of sandy soil cushions on the rock-shed under rockfall impact load[J]. Journal of Sichuan University(Engineering Science Edition), 2016, 48(1): 15-22.(in Chinese)
[29] 杨 青,马 蕙,籍仙荣.利用自相关函数和双耳自相关函数分析对交通噪声特征参量的提取[J].声学学报,2014,39(5):624-632.
YANG Qing, MA Hui, JI Xian-rong. Parameter extraction of traffic noise by analysis of auto-correlation function and interaural cross-correlation function[J]. Acta Acustica, 2014, 39(5): 624-632.(in Chinese )
[30] 张玉萍.泥石流冲击信号识别方法研究[D].重庆:重庆交通大学,2009.
ZHANG Yu-ping. Signal identification method to debris flow impaction[D]. Chongqing: Chongqing Jiaotong University, 2009.(in Chinese)

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Last Update: 2019-11-13