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首页> 外文期刊>Computers and Geotechnics >Response of beams on a tensionless extensible geosynthetic-reinforced earth bed subjected to moving loads
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Response of beams on a tensionless extensible geosynthetic-reinforced earth bed subjected to moving loads

机译：横梁在承受移动载荷的无张力可扩展土工合成材料土床上的响应

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摘要

In this paper analysis of an infinite beam resting on reinforced granular bed overlying a soft soil strata subjected to a moving load with constant velocity is presented. The separation between the beam and ground surface is taken into the account while analyzing the system. The upper reinforced granular bed is modeled by a rough membrane embedded in Pasternak shear layer overlying a series of compressible Winkler springs representing the underlying soft soil. The extensible geosynthetic is assumed to deform such that at interface the geosynthetic and the soil have same deformation. This condition eliminates the two interfacial shear stress parameters and at the same time also incorporates the stiffness of geosynthetic in the model. The lift up of the beam and mobilized tension in the geosynthetic layer are observed to be more for the tensionless foundation as compared to that reacting in tension and compression. It has been further observed that the flexural response of the infinite beam as well as of the reinforcement, are greatly affected by the velocity, intensity of load, relative compressibility of granular fill and stiffness of the geosynthetic. For the range of parameters studied the shear moduli of granular layers do not significantly affect the response of the beam.
机译：在本文中，分析了无定形梁在加有固定速度的移动荷载作用下，位于软土层上的加筋颗粒床上的无限梁。在分析系统时，应考虑到梁与地面之间的距离。上部加固颗粒床由埋在Pasternak剪切层中的粗糙膜模拟，该膜覆盖在代表下伏软土的一系列可压缩Winkler弹簧上。假定可延伸的土工合成材料发生变形，以使土工合成材料和土壤在界面处具有相同的变形。这种情况消除了两个界面切应力参数，同时还将土工合成材料的刚度纳入了模型。与无张力基础相比，在无张力基础中，梁的抬升和土工合成层中动员的张力更加明显。进一步观察到，无限梁和钢筋的挠曲响应受速度，载荷强度，粒状填充物的相对可压缩性和土工合成材料的刚度的影响很大。对于所研究的参数范围，颗粒层的剪切模量不会显着影响梁的响应。

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