原文传递
ALTERNATIVE METHOD OF DETERMINING RESILIENT MODULUS OF COMPACTED SUBGRADE SOILS USING FREE-FREE RESONANT COLUMN TEST.
| 题名： | ALTERNATIVE METHOD OF DETERMINING RESILIENT MODULUS OF COMPACTED SUBGRADE SOILS USING FREE-FREE RESONANT COLUMN TEST. |
| 作者： | Kim-D-S; Kweon-G-C; Lee-K-H |
| 关键词： | MODULUS-OF-RESILIENCE; SUBGRADES-; FREE-FREE-RESONANT-COLUMN-TESTS; MODULUS-OF-ELASTICITY-SOIL; POISSON'-S-RATIO; RESONANT-COLUMN-TESTS; TORSIONAL-SHEAR-TESTS; LOADING-FREQUENCY |
| 摘要： | An alternative procedure of determining the resilient modulus (M sub R) of compacted subgrade soils using a free-free resonant column (FF-RC) test is proposed. The FF-RC test was used to determine a small-strain Young's modulus (E sub max) and Poisson's ratio on the basis of the elastic wave propagation theory. Resonant column (RC) and torsional shear (TS) tests were performed to investigate the effects of loading frequency and strain amplitude on the resilient modulus of subgrade soils. By performing FF-RC, RC/TS, and M sub R tests on the synthetic specimens of known stiffnesses, the feasibility of using the FF-RC test to measure the M sub R was evaluated and the M sub R testing equipment was calibrated. Moduli of subgrade soils determined by FF-RC tests match well with values obtained from RC and TS tests at small strains, indicating that the FF-RC test can provide a reliable estimation of E sub max, if the effects of loading frequency are considered. In the proposed method, E sub max obtained from the FF-RC test can be combined with the effect of loading frequency and the modulus reduction curve determined by the data base of the RC and TS tests for the compacted subgrade soils of various plasticity indexes. Moduli obtained from the proposed method overlapped nicely with M sub R values determined by standard M sub R testing, showing the capability of the proposed method being used in determining M sub R values, provided that the effects of loading frequency and modulus reduction curve are considered. |
| 总页数： | Transportation Research Record. 1997. (1577) pp62-69 (10 Fig., 3 Tab., 9 Ref.) |
| 报告类型： | 科技报告 |
相关文献
- Formwork Pressure of Self-Consolidating Concrete in Tall Wall Field Applications.
- RESILIENT MODULUS OF SOFT SOIL BENEATH HIGH-SPEED RAIL LINES.
- FIELD VERIFICATION OF LABORATORY RESILIENT MODULUS MEASUREMENTS ON SUBGRADE SOILS.
- Rational Estimation of Construction Impact on Pavement Performance.
- Frameworks to Represent Uncertainty When Level of Service Is Determined.
- DETERMINATION OF RESILIENT MODULUS OF SUBGRADES USING BENDER ELEMENTS.
检索历史
应用推荐
