摘要
考虑土钉-土体的相互作用,建立三维有限元模型,分析计算土钉支护结构的内力和位移,提出了变形控制和应力控制相结合的优化设计方法。采用遗传算法,以应力和位移为约束条件,以工程造价为目标函数,建立了土钉支护结构的优化设计数学模型,并编制了相应的计算程序,通过算例分析,并基于规范法的优化设计结果相比较,得出本文的设计方法更为合理的参考结论。
The interaction between soil nailing and soil is considered and a true three-dimensional finite element model has been developed to analyze the strain-stress and the deformation performances of soil nailings. The optimum design method with deformation control and stress control of soil-nail retaining structure is presented. Using genetic algorithms and complex method, the mathematical model of structural optimal design is established regarding the stress and the deformation as constraint conditions and regarding the project cost as objective function; and the calculation program is compiled correspondingly. Taking a case study and comparing with the result of specification method and the optimal results based on specification method, the present optimal method is more reasonable.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2007年第11期2461-2464,共4页
Rock and Soil Mechanics
基金
上海市重点学科(岩土工程)建设项目资助
关键词
土钉支护
三维有限元
遗传算法
极限平衡
soil nailing
3-D finite elements
genetic algorithms
ultimate balance
