【摘要】 借助罚因子建立了坝体接缝的增量本构模型,导出了互补虚功方程,采用有限元离散建立了坝体接缝的线性互补模型,该模型可以较好的反映接缝的接触条件,并提高计算效率。结合小湾拱坝对横缝及其初始间隙对拱坝工作性态的影响进行了分析,结果表明,如果横缝没有初始间隙,则它对坝体工作性态没有多大的影响,但当横缝存在初始间隙时则有较大的影响,坝体的应力和位移均随着初始间隙的增大而增大。更多还原

【Abstract】 An incremental constitutive model for joints of dam is established by means of penalty coefficient.The complementary virtual work equation is deduced.Based on the FEM,a linear complementary model for joint is proposed.The model well describes the contact condition of the joints and promotes the computation efficiency.The calculation of Xiaowan arch dam is given as an example to analyze the influence of joint and initial gap on behavior of arch dam.The calculation result indicates that the joint has little influence if there is no initial gap,but the influence will be remarkable if initial gap exists.The stress and displacement increase with the increase of initial gap.更多还原