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Dynamic Characteristics of Saturated Soft Clays under Cyclic Loading in Drained Condition
https://orcid.org/https://orcid.org/0000-0002-5187-9110
https://orcid.org/https://orcid.org/0000-0002-9017-6469
https://orcid.org/https://orcid.org/0000-0001-9921-708X
https://orcid.org/https://orcid.org/0000-0002-2810-8086
https://orcid.org/https://orcid.org/0000-0003-3583-1288
This study presents an experimental investigation on the effects of cyclic loading waveform and cyclic stress ratio (CSR) on dynamic behaviors through laboratory tests on a source of soft clay under cyclic loading in drained condition. Test results showed that under different cyclic loading waveforms at a given frequency (f = 1 Hz) and CSR = 0.6, the axial strain increases significantly at a relatively lower number of cycles (N) and then became stable, while the axial strain consistently decreases with the increasing N and tend to be stable. At a given N, specimen under sine wave cyclic loads shows a higher axial strain rate than that under triangle wave or square cyclic loads. Test results also indicated that at different CSRs, the axial strain increases rapidly at a relatively lower N and then gradually tends to be stable with the increasing N at lower CSR yet there is no stable trend for specimens at higher CSR, which indicates there is a critical value of CSR. It is recommended to apply the cyclic loading in sine waveform with CSR close to and less than the critical value to get a better treatment effect.
Dynamic Characteristics of Saturated Soft Clays under Cyclic Loading in Drained Condition
https://orcid.org/https://orcid.org/0000-0002-5187-9110
https://orcid.org/https://orcid.org/0000-0002-9017-6469
https://orcid.org/https://orcid.org/0000-0001-9921-708X
https://orcid.org/https://orcid.org/0000-0002-2810-8086
https://orcid.org/https://orcid.org/0000-0003-3583-1288
This study presents an experimental investigation on the effects of cyclic loading waveform and cyclic stress ratio (CSR) on dynamic behaviors through laboratory tests on a source of soft clay under cyclic loading in drained condition. Test results showed that under different cyclic loading waveforms at a given frequency (f = 1 Hz) and CSR = 0.6, the axial strain increases significantly at a relatively lower number of cycles (N) and then became stable, while the axial strain consistently decreases with the increasing N and tend to be stable. At a given N, specimen under sine wave cyclic loads shows a higher axial strain rate than that under triangle wave or square cyclic loads. Test results also indicated that at different CSRs, the axial strain increases rapidly at a relatively lower N and then gradually tends to be stable with the increasing N at lower CSR yet there is no stable trend for specimens at higher CSR, which indicates there is a critical value of CSR. It is recommended to apply the cyclic loading in sine waveform with CSR close to and less than the critical value to get a better treatment effect.
Dynamic Characteristics of Saturated Soft Clays under Cyclic Loading in Drained Condition
https://orcid.org/https://orcid.org/0000-0002-5187-9110
https://orcid.org/https://orcid.org/0000-0002-9017-6469
https://orcid.org/https://orcid.org/0000-0001-9921-708X
https://orcid.org/https://orcid.org/0000-0002-2810-8086
https://orcid.org/https://orcid.org/0000-0003-3583-1288
This study presents an experimental investigation on the effects of cyclic loading waveform and cyclic stress ratio (CSR) on dynamic behaviors through laboratory tests on a source of soft clay under cyclic loading in drained condition. Test results showed that under different cyclic loading waveforms at a given frequency (f = 1 Hz) and CSR = 0.6, the axial strain increases significantly at a relatively lower number of cycles (N) and then became stable, while the axial strain consistently decreases with the increasing N and tend to be stable. At a given N, specimen under sine wave cyclic loads shows a higher axial strain rate than that under triangle wave or square cyclic loads. Test results also indicated that at different CSRs, the axial strain increases rapidly at a relatively lower N and then gradually tends to be stable with the increasing N at lower CSR yet there is no stable trend for specimens at higher CSR, which indicates there is a critical value of CSR. It is recommended to apply the cyclic loading in sine waveform with CSR close to and less than the critical value to get a better treatment effect.
Dynamic Characteristics of Saturated Soft Clays under Cyclic Loading in Drained Condition
KSCE J Civ Eng
Miao, Yong-Hong (author) / Sheng, Ruo-Yu (author) / Yin, Jie (author) / Zhou, Fan-Bo (author) / Lu, Jian-Fei (author)
KSCE Journal of Civil Engineering ; 24 ; 443-450
2020-02-01
8 pages
Article (Journal)
Electronic Resource
English
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