• Title/Summary/Keyword: 제하

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Behaviour of Dry Sand under $K_o$-Loading / Unloading Conditions(II) : Hysteretic Test ($K_o$-재하/제하에 의한 건조모래의 거동(II): 다주기 시험)

  • 정성교;정진교
    • Geotechnical Engineering
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    • v.11 no.1
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    • pp.23-40
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    • 1995

  • In order to investigate the characteristics of the lateral earth pressure at rest under hysteretic Ko -loading l unloading conditions. Seven types of multicyclic models have been studied experimentally using dry sand. For this study a new type of Ko -oedometer appal attn is developed, and horizontal pressure is accurately measured. The multi cyclic models consist of largely 3 cases : (i) Ko-test under the same loading/unloading condition, (ii) multi-cyclic loading /unloading Ko -test exceeding the maximum prevertical stress, and (iii) multi-cyclic loading l unloading Ko -test within the mazimium prevertical stress. As a result, the multi -cyclic model showed that single-cyclic model could be extended as well, in which the exponents for unloading condition(a and a') and the reloading coefficients(m, and m*) were mainily dependent upon type of stress model, number of cycles and relati ve density.

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