【摘要】 结合工程结构被动控制领域的研究成果及进展(以大行程板式铅剪切阻尼器为例),对罕遇地震作用下千米级斜拉桥的减震控制进行了分析研究。通过对比分析大行程板式铅剪切阻尼器、粘滞阻尼器和弹性连接三者的数值计算结果发现,只要设计时阻尼器的相关参数选择恰当,大行程板式铅剪切阻尼器的减震效果要优于弹性连接,且与粘滞阻尼器相当。同时,分析了在正常运营阶段温度作用下减震装置对结构的影响。计算结果表明,大行程板式铅剪切阻尼器对结构的附加内力并不会比弹性连接引起的附加内力大,在运营阶段对结构的影响较小。大行程板式铅剪切阻尼器不仅满足了结构减震控制中对行程的要求,而且使用寿命长,构造简单,成本低,在千米级斜拉桥的减震控制中具有良好的应用前景。更多还原

【Abstract】 The structural damping control of a kilometer-scale cable-stayed bridge under rare earthquake was researched based on the latest achievements(e.g.,the lead shear damper with long stroke) of the passive control for engineering structures.By comparing the computation results of lead shear damper,viscous damper and elastic link,it is found that the damping effect of lead shear damper with long stroke is better than that of elastic link and close to that of viscous damper as long as the parameters are chosen properly.The effects of different damping devices on the structure under the temperature effect in the serviceability limit stage were also analysed.The calculation result shows that the additional internal force induced by lead shear damper with long stroke is not larger than that induced by elastic link,and it has less impact on the structure.Because lead shear damper with long stroke could meet the requirement for displacement and its structure is simple,its service life is long and the processing cost is low,this kind of damper has a good prospect in damping control of a kilometer-scale cable-stayed bridge.更多还原