【摘要】 浆砌块石拱坝的振动效应具有砌体结构和拱形结构的双重特征,通过振动速度和频率判据来评价大坝的安全性有一定局限性。通过引入混凝土损伤塑性模型,同时考虑拱坝的固有特性及振动持时,采用实测振动速度作为边界条件输入的方法,对爆破振动影响下的浆砌块石拱坝进行有限元时程分析,研究了大坝在爆破振动作用下的位移和损伤特性,为类似工程的安全评价提供参考。更多还原

【Abstract】 The vibration effect of stone masonry arch dams has dual characteristic of masonry and arch structures.The criterion of the vibration speed and frequency is not sufficient to evaluate the dam safety.Through importing the concrete damage plasticity model and considering the dam inherent characteristics and vibration duration,the stone masonry arch dam under blasting vibration was analyzed in time history by the method of monitored vibration velocity as boundary condition.The displacement and damage characteristics are also discussed in the analysis,which provides references for similar projects.更多还原