大应变静力触探数值模拟及锥形因子影响因素分析

以模拟圆锥在不排水黏土中的静力贯入和分析其影响因素为目标,假设土体为均质弹性—完全塑性材料且服从Mises屈服准则,采用任意拉格朗日—欧拉(ALE)网格划分技术确保锥尖土体在大应变条件下的网格质量,进行大应变有限元数值模拟,并分析了稳定状态下土体刚度指数、原位应力状态和锥尖粗糙程度对塑性区半径与锥形因子的影响,获得了锥形因子表达式。模拟结果表明:塑性区随着刚度指数的增大而增大,锥尖周围塑性区的径向扩张处于柱形孔扩张和球形孔扩张之间,更接近于球形孔扩张;锥形因子随土体刚度指数、锥尖粗糙程度的增大而增大,随土体原位应力状态参数的增大而减小;得到的锥形因子表达式可以量化土体刚度指数、原位应力状态和锥...

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Bibliographic details
Volume: 45
Main Author: 肖先波;李波;王婷;邱敏
Format: Journal Article
Language: Chinese
Place of publication: 湖州职业技术学院,浙江湖州,313000%长江科学院,湖北武汉,430010%中国地质大学(武汉)工程学院,湖北武汉,430074 2018
published in: 水文地质工程地质 Vol. 45; no. 2; pp. 70 - 76
Data of publication: 2018
ISSN: 1000-3665
Alternate Title: Large-strain numerical simulation for cone penetration and analysis of influence factors for the cone factor
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Bibliography: XIAO Xianbo1 , LI Bo2 , WANG Ting1 , QIU Min3 (1. Huzhou Vocational and Technological College, Huzhou, Zhejiang 313000, China; 2. Changjiang River Scientific Research Institute, Wuhan, Hubei 430010, China; 3. Faculty of Engineering, China University of Geosciences ( Wuhan) , Wuhan, Hubei 430074, China)
cone penetration; large-strain finite element; cone factor; rigidity index; in situ stress state; coneroughness
Simulation of static penetration of cone in the undrained clay and analyses of its influence factor are taken as the research objectives. It is assumed that the soil is idealized as a homogeneous elastic and perfectly plastic material obeying the Von-Mises yield criterion. An Arbitrary Langrangian-Eulerian(ALE) technique is adopted to preserve the quality of mesh under the condition of large-strain for performing large strain finite element numerical simulation. The influences of the rigidity index,in situ stress state and the cone roughness on the radius of the plastic zone and the cone factor under st
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