连续梁桥耗能减振理论简化计算办法研究

Study on the simplification method of vibration energy dissipation for the continuous beam bridge

对多种连续梁桥附加阻尼器的构造和模型简化进行了介绍,由于目前的连续梁桥普遍采用在活动墩和主梁间附加阻尼器的办法之间减少结构的地震反应,而这类结构可以近似采用主次结构进行简化,而将问题转化为两个相邻结构设置阻尼器的优化问题,采用优化公式可以近似估算连续梁桥的减震反应。文章最后分别对两个连续梁桥进行了试算,并通过数值分析对结果进行复核,结果显示这种估算方法较为准确。如果将结构较为复杂的双塔斜拉桥以及悬索桥进行类似的模型简化,可对普遍采用的阻尼器参数试算法从原理上进行解释。

The construction and simplified model of some kinds of continuous bridge with damper are introduced.Since the damper is commonly applied between the sliding piers and the box frames in the continuous bridge,this kinds of compositions could approximate simplify to primary and secondary structures,the question changes to the optimization applying dampers in adjacent structures,some optimized method could estimate the reaction of continuous bridge in earthquake.Two continuous bridge are calculated in the last and checked with the digital analysis,the result shows the method with some accuracy.If the complicated double pylon cable stayed bridge and suspension bridge could simplify to some simple models,the traditional way for giving the parameter of the damper could give some principle explanation.