【摘要】 结合多跨连续梁桥的结构特点,把连续梁桥简化为两单自由度系统模型.基于相对位移法和随机振动理论,推导行波输入下由结构振动引起的最大墩梁相对位移公式,提出行波输入下基于规范反应谱的连续梁桥支承长度设计方法.通过一座多跨连续梁桥工程实例说明支承长度设计方法的具体工程应用,并采用非线性时程分析方法对设计结果进行验证.更多还原

【Abstract】 Based on the key dynamic characteristics of multi-span continuous bridges,using the relative displacement method and random vibration theory,the maximum relative vibration displacement of pier and beam was derived under the excitation of traveling waves.Using seismic response spectrum,a design method of the required seating length for multi-span continuous bridges considering traveling wave effects was put forward.Analyzing an example of multi-span continuous bridges,the engineering application of the design method of the required seating length is demonstrated,and the proposed design method is verified by the results of nonlinear time history analysis.更多还原