【摘要】 建立高拱坝横缝非线性接触模型,将形状记忆合金(SMA)耗能棒材引入高拱坝结构的非线性抗震分析中,实现该耗能阻尼器力学元件的数值模拟,探讨其控制原理和方法。通过对不同结构进行计算分析,结果表明,与布设普通钢筋相比,应用SMA耗能阻尼构件对高拱坝在强震作用下的横缝张开度的控制效果更为明显,并能有效地减小坝体结构的加速度响应,对坝体结构的应力分布规律影响不大。该减震控制装置构造简单,便于施工安装。更多还原

【Abstract】 A nonlinear contact numerical model of high arch dams with contraction joints is established for transient simulations.Restrainer bars of shape memory alloys(SMA) are adopted to reduce the nonlinear seismic response of arch dams,and simulation method of their energy damping and control mechanism is discussed.Simulation results with various earthquake resistance measures show that these bars are more effective in limiting joints opening and seismic acceleration than traditional joint reinforcements,while they cause little effect on stress distribution.更多还原