RISS 검색 - 국내학술지논문 상세보기

다국어 초록 (Multilingual Abstract)

The shear behavior of soil-concrete interface is mainly affected by the surface roughness of the two contact surfaces. The present research emphasizes on investigating the effect of roughness of soil-concrete interface on the interface shear behavior in two-layered laboratory testing samples. In these specially prepared samples, clay silt layer with density of 2027 kg/m3 was selected to be in contact a concrete layer for simplifying the laboratory testing. The particle size testing and direct shear tests are performed to determine the appropriate particles sizes and their shear strength properties such as cohesion and friction angle. Then, the surface undulations in form of teeth are provided on the surfaces of both concrete and soil layers in different testing carried out on these mixed specimens. The soil–concrete samples are prepared in form of cubes of 10*10*30 cm. in dimension. The undulations (inter-surface roughness) are provided in form of one tooth or two teeth having angles 15° and 30°, respectively. Several direct shear tests were carried out under four different normal loads of 80, 150, 300 and 500 KPa with a constant displacement rate of 0.02 mm/min. These testing results show that the shear failure mechanism is affected by the tooth number, the roughness angle and the applied normal stress on the sample. The teeth are sheared from the base under low normal load while the oblique cracks may lead to a failure under a higher normal load. As the number of teeth increase the shear strength of the sample also increases. When the tooth roughness angle increases a wider portion of the tooth base will be failed which means the shear strength of the sample is increased.

참고문헌 (Reference)

1 Braja M. Das, "Use of geogrid in the construction of railroads" Springer Science and Business Media LLC 1 (1): 15-, 2016

2 Baofeng Pan, "Theoretical analysis of overlay resisting crack propagation in old cement concrete pavement" 국제구조공학회 52 (52): 829-841, 2014

3 Fan, Y., "The mutual effects between two unequal collinear cracks under compression" 22 : 1205-1218, 2016

4 Murat Yaylacı, "The investigation crack problem through numerical analysis" 국제구조공학회 57 (57): 1143-1156, 2016

5 Liming Hu, "Testing and Modeling of Soil-Structure Interface" American Society of Civil Engineers (ASCE) 130 (130): 851-860, 2004

6 R.V. Silva, "Tensile strength behaviour of recycled aggregate concrete" Elsevier BV 83 : 108-118, 2015

7 L. M. Chu, "Study on soil–cement grout interface shear strength of soil nailing by direct shear box testing method" Informa UK Limited 1 (1): 259-273, 2006

8 Xiaomeng Wang, "Study of rock dynamic fracture toughness by using VB-SCSC specimens under medium-low speed impacts" Elsevier BV 181 : 52-64, 2017

9 Peng, K., "Study of mechanical behaviors of interface between coarse-grained soil and concrete by simple shear test" 29 (29): 1893-1900, 2010

10 Ramadoss, P., "Stress-strain behavior and toughness of high-performance steel fiber reinforced mortar in compression" 11 (11): 55-65, 2013