考虑时间效应的刚性基础沉降分析

土体变形的时效性反映了土体同结与流变的统一，亦即地基刚度本身具有时效性，通过采用解析的方法建立了考虑时间效应的地基柔度矩阵，得出考虑时间效应的刚性基础计算方法，并编制相应程序对考虑时间效应的刚性基础进行计算，分析并得出其内力、变形等随时间发展的规律：加载初期沉降发展较快，后期虽然沉降速率有很大递减，但沉降大小仍将随着时间推移而增加：计算区域基底反力在加荷初期变化较大，角点反力增大，中心点反力减小。随着时间的增长，反力不断调整并逐渐趋于稳定，呈现边缘大、中间小的马鞍形特征。

Settlement analysis of rigid foundation considering time effect

The time effect of soil deformation reflects the unification of soil consolidation and rheology, and that is, the soil rigidity itself has time effect. Through the analytical method, the rigidity matrix of building foundation considering time effect has been established; and thus the calculation of the rigid foundation is solved with program. The working mechanism of the rigid foundation, such as the contact pressure and deformation, has been demonstrated. Initially, the settlement and contact pressure of the foundation develop quickly in the beginning of loading, and then slow down. Along with the time growth, the settlement still increases, also, the contact pressure increases in the comer of foundation and decreases in the center, and gradually tends to be stable. Finally, the distribution curve of the counterforce acting on foundation is characteristic of a saddle-like shape, which is higher in the edges and lower in the center.