摘要
对带吸能装置的钢筋混凝土桥墩进行了落锤撞击荷载动力响应分析。根据伯努利-欧拉理论求解其振型,利用拉格朗日方程和落锤运动方程推导其弹性阶段的动力响应和吸能装置的位移时程表达式,从而求得桥墩的动内力。然后,将计算结果与承受轴力的侧向落锤撞击荷载试验结果进行对比,两者符合较好。这表明,本算法用来求解撞击荷载作用下带吸能装置的钢筋混凝土桥墩其弹性阶段的动力响应是可行的,因而具有一定工程应用价值。
Impact tests were carried out on reinforced concrete pier installed energy dissipation devices under static axial force and lateral impact loading by dropping-weight.Based on the experimental research,the computational method of dynamic response of reinforced concrete pier installed energy dissipation devices under impact load was presented.The pier was simplified as systems of distribution parameters.The lateral deflection of pier was expressed using the generalized coordinate method.Vibration models of the pier in fix-simple support were obtained by use of bernoulli-euler theory.Dynamic response of reinforced concrete pier in elastic phase and time-history of deflection of hammer were obtained by use of Lagrange equation and motion equation of hammer.Compared with test results,a good agreement was obtained between computational results and experimental results.
出处
《四川建筑科学研究》
北大核心
2010年第6期7-10,18,共5页
Sichuan Building Science
关键词
动力响应
撞击荷载
钢筋混凝土桥墩
吸能装置
dynamic response
impact load
reinforced concrete circular pier
energy dissipation device
