拱桥多点动力响应振动台模型试验与理论分析  

Vibration table tests for the archbridge under multi points inputs

作　　者：樊珂[1] 李振宝[1] 闫维明[1] 

机构地区：[1]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100022

出　　处：《铁道科学与工程学报》2007年第6期19-24,共6页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(50508003)

摘　　要：通过欠质量一致相似律对某钢管混凝土拱桥进行缩尺,联动2个振动台组成小型振动台阵,采用正弦波激励,对缩尺模型进行多点振动台试验,以探寻大跨结构的多点振动台试验方法。将试验结果和模拟结果相比较,互相验证了数值模拟的可靠性以及试验结果的有效性,并表明传统的一致激励计算,有可能导致结构抗震性能的不足。Scale model of the concrete filled steel tube archbridge was conducted based on the similarity,and two small vibration tables were combined to offer the multi-excitation of sine wave to discuss the method of vibration table tests with multi-excitation.The comparison of the rerults verify the reliability of the numerical calculation results and the validity of the test results.The results show that uniform input maybe induce the insufficient of seismic performance.

关 键 词：拱桥 缩尺模型 多点输入 振动台试验 

分 类 号：TU317.1[建筑科学—结构工程]