Dynamic Test Method and Strength Parameters of Synthetics

• Main Authors: Yi-chih Chang, 張一之
• Other Authors: Shannon Hsien-Heng Lee
• Format: Others
• Language: zh-TW
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/09890222822108826830

碩士 === 國立臺灣科技大學 === 營建工程系 === 88 === This research adopted dynamic test service designed by S.H.Lee to proceed with geogrid dynamic tensile test and the dynamic pull-out test under 45.8kPa、91.6kPa、137.4kPa normal pressure in order to find out the relationship between sustained stress、pulsating stress、cycles of loading and strain(displacement). Moreover，the researcher diagramed according to the test results trying to investigate the dynamic behavior of reinforced retaining wall first，and then compare with the results of program analysis. Test results reveal that the strain of grid increased by the increase of cycles of loading. The capital strain most happened in the first step (Nc=1~10)，and stiffness trend was toward steady in the loading process. And dynamic pull-out test revealed that the same pulsating stress caused the dynamic displacement was almost the same，not influenced obviously by sustained stress，but bearing members needed larger displacement to provide dynamic resistance. Under the same cycles of loading, the strain contour line of the sustained stress、pulsating stress coordinate reveals parallels；the trend of dynamic pull-out behavior seemed the same，but its displacement was not regular after conclusion. The importance of this steady is that it may forecasted the dynamic lateral displacement of reinforced retaining wall from pulsating stress、sustained stress and strain(displacement) relative curves，the results could be accepted，and it also needs further research to prove more.