摘要
应用有限单元法,建立了土工合成材料拉拔试验计算模型,分析筋土界面力学行为,研究拉拔端不同位移时筋土界面摩阻力与筋材拉伸变形的分布特点,以及筋材刚度与试验超载对筋土界面摩阻力、筋材拉伸变形的影响。结果表明:筋土界面摩阻力并非均匀分布,位于拉拔端附近界面摩阻力有一峰值;对于高强度筋材,随着拉拔端拉伸位移的增大,峰值摩阻力逐渐后移,直至整个界面发生剪切滑动;筋材拉伸刚度与超载需匹配,超载越大,筋材刚度越高,筋材承载能力越强。
Tensile test calculation mode for geosynethetics is established based on finite element method to analyze mechanical behavior of reinforced soil interface,study the distribution of reinforced soil interface friction and reinforced material tensile deformation under different displacement of tensile end,and study the influence of reinforced material rigidity and test overload on reinforced soil interface friction and reinforced material tensile deformation.It is indicated that reinforced soil interface friction is not distributed uniformly,but the interface frictional resistance has a peak value near tensile end.For high-strength reinforced material,with the increase of displacement of tensile end,peak friction gradually moves backward till the whole interface slides under shear strength.Reinforced material tensile rigidity shall be compatible with overload.The more overload,the higher rigidity and the stronger bearing capacity of reinforced material.
出处
《路基工程》
2010年第4期64-66,共3页
Subgrade Engineering
基金
交通部西部交通建设科技项目(200431882206)
高等学校优秀青年人才基金项目(2009SQRZ106)
关键词
拉拔试验
界面特性
土工合成材料
有限单元法
tensile test
interface characteristics
geosynethtics
finite element method
