Geobelt deformation is of significance when making prejudgments on potential failure planes in reinforced structures.A failure plane results from two geobelt failure modes,tensile failure and pullout.In order to inves...Geobelt deformation is of significance when making prejudgments on potential failure planes in reinforced structures.A failure plane results from two geobelt failure modes,tensile failure and pullout.In order to investigate the deformation characteristics of geobelts in two failure modes,results from pullout tests on sensor-enabled geobelts(SEGBs)with various lengths in sand are reported here across a range of normal pressures.Self-measurements of SEGB can provide data during the tests regarding distributions of strain,stress,and displacement.Data collected during pullout tests reveal the effects of normal pressures and specimen lengths on failure mode.A critical line considering normal pressure and specimen length is derived to describe the transition between two failure modes,an approach which can be utilized for preliminary predictions of failure mode in pullout tests.Warning criteria established based on critical line and data from the self-measurements of SEGB are proposed for failure mode prediction which can contribute to prejudgments of potential failure plane in geosynthetically reinforced soil structures.展开更多
A new type of intelligent geosynthetic product,sensor-enabled geobelt(SEGB),is developed to improve the health monitoring of geotechnical structures.It can be used as a strain monitoring sensor owing to its unique pro...A new type of intelligent geosynthetic product,sensor-enabled geobelt(SEGB),is developed to improve the health monitoring of geotechnical structures.It can be used as a strain monitoring sensor owing to its unique property.As a conductive polymer,its electrical resistance regularly changes with its strain.Simultaneously,the SEGB is a geosynthetic product.This implies that it can be used as a reinforcement to strengthen a geotechnical structure.Therefore,to investigate its long-term mechanical properties within the temperature range of its service,a stress relaxation test is performed within the range of−20℃ to 40℃.The results show that the stress relaxation of the SEGB stabilizes at a certain stress level instead of decreasing to zero.Additionally,the process of its stress relaxation is accompanied by damage.Based on this phenomenon,a ternary physical constitutive model reflecting the constitutive relationship of the SEGB is established.Furthermore,a stress relaxation model involving damage evolution,temperature,and initial strain is established.It can be used to describe the stress relaxation process of SEGB at different service temperatures.展开更多
基金Project supported by the National Key Research and Development Program of China(No.2018YFB1600100)the National Natural Science Foundation of China(Nos.51778346 , 51608461)。
文摘Geobelt deformation is of significance when making prejudgments on potential failure planes in reinforced structures.A failure plane results from two geobelt failure modes,tensile failure and pullout.In order to investigate the deformation characteristics of geobelts in two failure modes,results from pullout tests on sensor-enabled geobelts(SEGBs)with various lengths in sand are reported here across a range of normal pressures.Self-measurements of SEGB can provide data during the tests regarding distributions of strain,stress,and displacement.Data collected during pullout tests reveal the effects of normal pressures and specimen lengths on failure mode.A critical line considering normal pressure and specimen length is derived to describe the transition between two failure modes,an approach which can be utilized for preliminary predictions of failure mode in pullout tests.Warning criteria established based on critical line and data from the self-measurements of SEGB are proposed for failure mode prediction which can contribute to prejudgments of potential failure plane in geosynthetically reinforced soil structures.
基金Project(2018YFB1600100)supported by the National Key Research and Development Project of ChinaProjects(51778346,52027813)supported by the National Natural Science Foundation of ChinaProject(2019GSF111007)supported by the Key Research and Development Project of Shandong Province,China。
文摘A new type of intelligent geosynthetic product,sensor-enabled geobelt(SEGB),is developed to improve the health monitoring of geotechnical structures.It can be used as a strain monitoring sensor owing to its unique property.As a conductive polymer,its electrical resistance regularly changes with its strain.Simultaneously,the SEGB is a geosynthetic product.This implies that it can be used as a reinforcement to strengthen a geotechnical structure.Therefore,to investigate its long-term mechanical properties within the temperature range of its service,a stress relaxation test is performed within the range of−20℃ to 40℃.The results show that the stress relaxation of the SEGB stabilizes at a certain stress level instead of decreasing to zero.Additionally,the process of its stress relaxation is accompanied by damage.Based on this phenomenon,a ternary physical constitutive model reflecting the constitutive relationship of the SEGB is established.Furthermore,a stress relaxation model involving damage evolution,temperature,and initial strain is established.It can be used to describe the stress relaxation process of SEGB at different service temperatures.
