›› 2011, Vol. 32 ›› Issue (1): 211-216.

• Geotechnical Engineering • Previous Articles     Next Articles

A new method of subsoil damping ratio identification based on free vibration of a massive concrete foundation

TIAN Qi-qiang 1,2，HOU Xing-min1，WANG Zi-fa2   

  1. 1. School of Civil Engineering, Yantai University, Yantai, Shandong 264005, China; 2. Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China
  • Received:2010-03-03 Online:2011-01-10 Published:2011-01-19

PDF (Chinese)

3326

Abstract:

A new method of subsoil damping ratio identification based on law of conservation of energy is proposed. This method considers the whole time histories of vibration, differs from the traditional damping ratio identification method in the time domain which uses merely the amplitude to calculate damping ratio, and overcomes the defect of the traditional logarithmic decrement method for high accuracy requirement of amplitudes. The subsoil damping ratio of a massive concrete foundation is tested and calculated. The results of numerical simulation and actual test show that this method is of higher precision, stronger anti-noise ability and better stability compared with the traditional logarithmic decrement method. Even if the data acquisition is disturbed seriously by noise, the method proposed is effective and reliable.

Key words: damping ratio, free vibration, conservation of energy, velocity time-history

CLC Number: 

  • TU 413
[1] LIANG Ke, HE Yang, CHEN Guo-xing, . Experimental study of dynamic shear modulus and damping ratio characteristics of coral sand from Nansha Islands [J]. Rock and Soil Mechanics, 2020, 41(1): 23-31.
[2] RUI Sheng-jie, GUO Zhen, WANG Li-zhong, ZHOU Wen-jie, LI Yu-jie, . Experimental study of cyclic shear stiffness and damping ratio of carbonate sand-steel interface [J]. Rock and Soil Mechanics, 2020, 41(1): 78-86.
[3] LIANG Ke, CHEN Guo-xing, HE Yang, LIU Jing-ru, . An new method for calculation of dynamic modulus and damping ratio based on theory of correlation function [J]. Rock and Soil Mechanics, 2019, 40(4): 1368-1376.
[4] ZHUANG Xin-shan, WANG Jun-xiang, WANG Kang, LI Kai, HU Zhi. Experimental study on dynamic characteristics of expansive soil modified by weathered sand [J]. Rock and Soil Mechanics, 2018, 39(S2): 149-156.
[5] ZHANG Wei, LI Ya, ZHOU Song-wang, JIANG Zheng-bo, WU Fei, LIANG Wen-zhou,. Experimental research on cyclic behaviors of clay in the northern region of South China Sea [J]. , 2018, 39(7): 2413-2423.
[6] KONG Gang-qiang, LI Hui, WANG Zhong-tao , WEN Lei,. Comparison of dynamic properties between transparent sand and natural sand [J]. , 2018, 39(6): 1935-1940.
[7] LIU Fei-yu, SHI Jing, WANG Jun, CAI Yuan-qiang,. Dynamic shear behavior of interface for clay reinforced with geogrid encapsulated in thin layers of sand [J]. , 2018, 39(6): 1991-1998.
[8] WU Meng-tao, LIU Fang-cheng, CHEN Ju-long, CHEN Lu. Influence of water content on dynamic shear modulus and damping ratio of rubber-sand mixture under large strains [J]. , 2018, 39(3): 803-814.
[9] CHEN Shu-feng, KONG Ling-wei, LI Cheng-sheng, . Nonlinear characteristics of Poisson's ratio of silty clay under low amplitude strain [J]. , 2018, 39(2): 580-588.
[10] HE Ming-ming, LI Ning, CHEN Yun-sheng, ZHU Cai-hui. Damping ratio and damping coefficient of rock under different cyclic loading conditions [J]. , 2017, 38(9): 2531-2538.
[11] LIU Jie, LEI Lan, WANG Rui-hong, WANG Fei, WANG Lian, XIAO Lei. Dynamic characteristics of sandstone under low-stress level conditions in freezing-thawing cycles [J]. , 2017, 38(9): 2539-2550.
[12] CHEN Le-qiu, ZHANG Jia-sheng, CHEN Jun-hua, CHEN Ji-guang，. Testing of static and dynamic strength properties of cement-improved argillaceous-slate coarse-grained soil [J]. , 2017, 38(7): 1903-1910.
[13] DENG Hua-feng, HU Yu, LI Jian-lin, WANG Zhe, ZHANG Xiao-jing, ZHANG Heng-bin. Effects of frequency and amplitude of cyclic loading on the dynamic characteristics of sandstone [J]. , 2017, 38(12): 3402-3409.
[14] DING Zu-de, HUANG Juan, YUAN Tie-ying, PENG Li-min, WANG Zhi-liang,. Experimental study of dynamic shear modulus and damping ratio of peaty soil in Kunming [J]. , 2017, 38(12): 3627-3634.
[15] HU Xiu-qing，, DONG Quan-yang, Lü Cheng-wei, WANG Jun, ZHUANG Xin-shan,. Resonant column experimental study of dynamic properties of soft clay foundation with cement soil mixing piles [J]. , 2016, 37(S2): 343-348.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] TAN Xian-jun, CHEN Wei-zhong, YANG Jian-ping, YANG Chun-he. Study of THM-damage coupling model of gas storage in salt rock with interlayer[J]. , 2009, 30(12): 3633 -3641 .
[2] WEI Xing，WANG Gang，YU Zhi-ling. FEM of traffic-load-induced settlement of road on soft clay[J]. , 2010, 31(6): 2011 -2015 .
[3] WEN Shi-yi, LI Jing , SU Xia , YAO Xiong. Studies of mesomechanical structure characters of surrounding rock failure under complex stress state[J]. , 2010, 31(8): 2399 -2406 .
[4] MAO Ning，ZHANG Yao-liang. Typical examples of simple methods to find empirical formulas[J]. , 2010, 31(9): 2978 -2982 .
[5] LIU Jie，LI Jian-lin，QU Jian-jun，Cheng Xing，LI Jian-wu，LUO Shi-wei. Multiple factors analysis of influence of developing horizontal displacement at Dagangshan dam abutment slope based on unloading rock mass mechanics[J]. , 2010, 31(11): 3619 -3626 .
[6] LI Wei-hua, ZHAO Cheng-gang, DU Nan-xin. Analysis of effects of saturated soft interlayer on seismic responses of metro station[J]. , 2010, 31(12): 3958 -3963 .
[7] HAN Xian-min. Study of construction technology and mechanical effect of Guanjiao tunnel in shallow-buried sandy stratum in Xining-Golmud 2nd line[J]. , 2010, 31(S2): 297 -302 .
[8] LIU Yong-hai, ZHU Xiang-rong, CHANG Lin-yue. Determining preconsolidation pressure by mathematic analysis based on casagrande method[J]. , 2009, 30(1): 211 -214 .
[9] ZHU Lei, HONG Bao-ning. Physico-mechanical characteristics of powdered soil of coal measure strata[J]. , 2009, 30(5): 1317 -1322 .
[10] ZHOU Chun-mei, ZHANG Ze-jun, XU Da-jie, WANG Sheng-wei, LI Xian-fu. Research on numerical simulation of paleo-tectonic stress fields and hazard prediction[J]. , 2009, 30(7): 2141 -2146 .
Copyright © Rock and Soil Mechanics, All Rights Reserved.
Tel: 027-87198484, 87199252, 87199253, 87198752　E-mail: ytlx@whrsm.ac.cn
Powered by Beijing Magtech Co. Ltd