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1 edition of Evaluation of in-situ soil damping characteristics found in the catalog.

Evaluation of in-situ soil damping characteristics

Evaluation of in-situ soil damping characteristics

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  • 10 Currently reading

Published by The Division, Available from GPO Sales Program, Division of Technical Information and Document Control, U.S. Nuclear Regulatory Commission, National Technical Information Service in Washington, D.C, Springfield, Va .
Written in English

    Subjects:
  • Soil mechanics.,
  • Damping (Mechanics),
  • Shear strength of soils.,
  • Soils -- Testing.

  • Edition Notes

    StatementShannon & Wilson, Inc., Agbabian Associates ; prepared for Division of Reactor Safety Research, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission.
    ContributionsU.S. Nuclear Regulatory Commission. Division of Reactor Safety Research., Shannon & Wilson., Agbabian Associates.
    The Physical Object
    Paginationxv, 170 p. :
    Number of Pages170
    ID Numbers
    Open LibraryOL16429657M

      Modeling and Seismic Evaluation of Nonstructural Components Testing Frame for Experimental Evaluation of Suspended Ceiling Systems Modeling of Elevated Water Tanks for Seismic Excitations Modelling and Analysis of High-damping Rubber Bearings for . Chapter 5 Engineering Properties of Soil and Rock Overview The purpose of this chapter is to identify, either by reference or explicitly herein, appropriate methods of soil and rock property assessment, and how to use that soil and rock property data to establish the final soil and rock parameters to be used for geotechnical design.

    Test study on the characteristics of mudcakes and in situ soils around bored piles Zhong-Miao Zhang, a Jun Yu, a Guang-Xing Zhang, a Xin-Min Zhou a a Key Laboratory on Soft Soil and Geo-Environmental Engineering, Ministry of Education, Zijingang Campus, Zhejiang University, Hangzhou , by: Bali Keynote: Stress-strain strength flow characteristics from enhanced in-situ testing ( MB pdf) Use of elastic continuum solution and DMT modulus for evaluating drilled shaft axial response in the Piedmont, (KB pdf).

    The small strain parameters of soil are important indexes for correct evaluation of the soil deformation. Based on the Stokoe resonant column system, the small strain dynamic characteristics of Zhanjiang strong structured clay under different consolidation stresses are investigated, including the dynamic shear modulus and damping : Mingyuan Wang, Zhigang Shan, Miaojun Sun, Kuanjun Wang. Estimating Total System Damping for Soil-Structure Interaction Systems Farhang Ostadan,a) Nan Deng,b) and Jose M. Roessetc) For a realistic soil-structure interaction (SSI) analysis, material damping in the soils and structural materials as well as the foundation radiation damping should be considered.


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Evaluation of in-situ soil damping characteristics Download PDF EPUB FB2

Genre/Form: Government publications: Additional Physical Format: Online version: Evaluation of in-situ soil damping characteristics.

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Correct evaluation of shear modulus and damping characteristics in soils under dynamic loading is key to both the fundamental understanding of soil behaviour and the practical application of soil modelling programs.

Dynamic centrifuge tests can contribute significant information about soil behaviour, but great care must be taken over the signal. Soil damping at very small strains is mainly due to the viscosity of the soil skeleton or of the pore fluid, depending on the strain rates or frequencies.

Correct evaluation of shear modulus and damping characteristics in soils under dynamic loading is key to both the fundamental understanding of soil behavior and the practical application of soil. Soil damping influence on seismic ground response: A parametric analysis for weak to moderate ground motion characteristics in soil deposits.

In situ energy attenuation mea- allows the use. In soil dynamics and geotechnical earthquake engineering, the parameter that traditionally measures the soil energy dissipation during harmonic excitation is the damping ratio (D), defined as: (1) D = Δ E 4 π E where ΔE represents the energy dissipated during one cycle at circular frequency ω, and E is the maximum strain energy stored during the by: 7.

stiffness matrix and therefore the damping matrix expressed by this model. Thus damping matrix allows decoupling of motion equations. /2 2 1 0 k k k a a ω ω ν = + a1ω k /2 k a 2ω 0 ν ωHz() Fig. 1 Relationship between parameters α and β scaled model of damping of Rayleigh and fraction of critical File Size: KB.

volumetric mass and damping. It must be taken into account that soil deposits are the results of centuries of geological action, sedimentary deposits and erosion. The (dynamic) soil characteristics must be determined by in situ testing.

Layers may not be horizontal or homogeneous. These aspects might influence the results,Cited by: 2. Performance metrics of the SMAP and AMSR2 F/T products compared with in situ soil temperature data for the freezing period in the eight study areas (Tsoil-F (Tsoil-T) means that a frozen (thawed) state is indicated by soil temperature).Author: Jian Wang, Lingmei Jiang, Huizhen Cui, Gongxue Wang, Jianwei Yang, Xiaojing Liu, Xu Su.

[1] Observations have described soil moisture profile variability in terms of phase shift, fluctuation damping, and persistence increasing with soil depth [Wu et al., ].This variability as a function of soil depth couples to climate variability.

Whether or not land models can reproduce this variability should be a good test of their parameterizations in soil hydrology both physically and Cited by: 5.

throughout its design life. Apart from these tests, other in-situ tests currently used for quality control of soil subgrades include in-situ CBR test, geogauge, dynamic cone penetrometer (DCP) and light or portable falling weight deflectometer [2][3].

The in-situ CBR test (Figure 1) is the common traditional in-situ test for soil subgrade. characteristics of asphalt concrete for each frequency up till approximately Hz as well as soil modulus.

The HMA dynamic modulus data from the laboratory testing, and non-destructive Falling Weight Deflectometer (FWD) test results have been to used develop relationships between seasonal changes and. Evaluation of in-situ soil damping characteristics / (Washington, D.C.: Division of Reactor Safety Research, Office of Nuclear Regulatory Research, U.S.

Nuclear Regulatory Commission ; GPO Sales Program, Division of Technical Information and Document Control, U.S.

Nuclear Regulatory Commission ; Springfield, Va.: National Technical. implemented. Laboratory and in-situ techniques for damping measurement are compared, and sampling disturbance effects on damping measurement are investigated.

MEASURES OF DAMPING Damping can be defined as the loss of energy within a vibrating or a cyclically loaded system, usually dissipated in the form of heat. TheCited by: 5. This paper presents a method for evaluating the nonlinear characteristics of the soils material from a certain layer which was investigate only by in situ methods using the nonlinear dynamic function experimentally determinate from the same material but situate in another layer.

Such method is needful for microzanation studies. Core Ideas Laboratory hydraulic parameters differ substantially from values estimated from field data. Hydraulic parameters determined in the laboratory overestimate hysteresis magnitude.

Field dat. The modulus reduction and damping curves presented herein may be used for seismic design of landfill covers and other engineered fills constructed of soils of similar plasticity and with similar stiffness (i.e., shear wave velocity) and compaction characteristics.

In situ measurements and observations of field performance provide a valuable source of information on the properties of municipal solid waste (MSW) for analysis of landfills.

`Static' properties of MSW such as unit weight and shear strength are evaluated from observations made during and after waste placement, including records of tonnage of waste received and cover soil used during disposal, observations of stable MSW slopes and in situ load tests Cited by: The LSMs can well capture the temporal variation of observed soil moisture over the Tibetan Plateau All LSMs display biases, and the soil moisture is systematically underestimated in the surface so Cited by:.

IS Indian Standard DETERMINATION OF DYNAMIC PROPERTIES OF SOIL - METHOD OF TEST (Second Revision) 1 SCOPE This standard covers methods of conducting block vibration test, cyclic plate load test and wave propagation test for evaluation of in situ dynamic and damping .The determination of soil properties is an essential step to proper foundation design.

It is useful and often necessary to determine the numerical values of these properties as they exist in nature through the use of in soil testing. In this study three methods of They are (1) the Menard Pressuremeter, situ soil .The in-situ ini-tial profiles of the shear wave velocity Vs resulting from Eq.

(1) and of the small strain shear modulus G0 are shown in Figure 2. An angle of friction δ = 20° has been considered at the soil-wall inter-faces.

The embedded length of the wall, equal to m, was computed by means of the classical BlumFile Size: 1MB.