Experimental on resistance to tensile stress and complete stress-strain curves of root system of Pinus tabuleeformis
LIU Xiu-Ping-；Chen-Li-Hua-；Song-Wei-Feng-；Rao-Liang-Yi-；Hu-Yu-Cun
College of Water and Soil Conservation,Beijing Forestry University,Key Laboratory of Soil and Water Conservation and Combating Desertification,Ministry of Education,100083,Beijing,China
Abstract：The mechanisms of soil-reinforcement by roots system have been researched through the tests for the pull-resistance of roots system of Pinus tabuleeformis in the Loess Plateau.The theory analysis and compare(results) of complete stress-strain curve show that load,stress,extend and strain increase pro rata, complete stress-strain curves present straight line relation in root system initial stage after tension.As the continuation of pulling force increases after loading over elastic limit,plasticity out of shape takes place in the root system,the complete stress-strain curves deviate from the straight line gradually, reflect the highly non-linear elastic characteristic.The test indicates that the root system tensile strength of the Pinus tabuleeformis have extremely close dependence to resist the amount of tension elastic model,according to results of the test,the unify mathematic expression of resistance to tensile stress and complete stress-strain curve is put forward,Which merge better between theory curves and experimental curves.
刘秀萍；陈丽华；宋维峰；饶良懿；胡雨村. 油松根系抗拉应力与应变全曲线试验研究[J]. 中国水土保持科学, 2006, 4(2): 66-70.
LIU Xiu-Ping-；Chen-Li-Hua-；Song-Wei-Feng-；Rao-Liang-Yi-；Hu-Yu-Cun. Experimental on resistance to tensile stress and complete stress-strain curves of root system of Pinus tabuleeformis. SSWCC, 2006, 4(2): 66-70.
2006, Vol. 4 
