Ther are three methos in calculating the foundation stiffness matrix by puting force on the element whether it is concentrated force or distributed force . in this article the near - distributedand far - concentrated is adopted . some documents show that the proposed method in calculating stiffness matrix is satisfied in solving the displacements and internal forces of plate by elastic theory . the bem as a valuable method has great advantage over precision and discret ; the foundation layered elastic modle has specific physic mean and easy calculatness 在计算地基刚度矩阵时,按施加在单元上的单位荷载是集中力还是均布力有三种计算方法:均布、近均布-远集中和集中。本文采用近均布-远集中方法计算。有关资料表明采用这种地基模型计算地基刚度矩阵,所获板内力和位移结果能很好的符合弹性解答的基本规律。
单位: unit荷载: load广义单位荷载: unit generalized load假置单位荷载: dummy unit load假置单位荷载法: dummy unit load method单位集中荷载: unit concentrated load单位虚荷载法: dummy unit-load method单位长度线荷载: linear load荷载: load◇荷载电抗 load reactance; 荷载率 load rate; 荷载曲线 load curve; 荷载图 load diagram; 荷载系数 load factor单位: 1.(计量事物的标准量的名称) unit (as a standard of measurement) 长度单位 a unit of length; 货币单位 monetary unit; 以秒为单位计算时间 measure time by the second2.(机关、团体或属于一个机关、团体的各个部分) unit (as an organization, department, division, section, etc.) 附属单位 affiliated unit; 基层单位 basic unit; grass-roots unit; 行政单位 administrative unit一位荷兰改教家门诺: menno simons半荷载: half load; half-load边荷载: side load变荷载: variable load冰荷载: ice loading超荷载: excess load次荷载: subordinate load单荷载: single load点荷载: point loading动荷载: dynamic load; energy load; live load; traveling load风荷载: wind loading负荷载: negative load拱荷载: arch load荷载板: loading plate荷载比: loading ratio