钢管混凝土单圆管拱结构振动台阵试验研究

发布时间：2018-09-14 10:19

【摘要】：为了研究钢管混凝土拱桥地震响应特性,以某钢管混凝土拱桥为原型,通过采用人工质量一致相似律设计制作1∶10缩尺比例的钢管混凝土拱结构模型,利用福州大学地震模拟振动台台阵系统,采用正弦波激励、Taft波以及当地场址生成的人工波等,进行了纵向、横向、横向+纵向地震动试验。试验结果表明,不同的地震波激励使结构产生不同的地震响应。Taft波横向激励产生的响应小于纵向激励的,人工波正好相反。拱顶的加速度相对于拱脚的有放大作用,放大倍数与输入波形的卓越周期相关;多维激励和行波激励使结构的加速度、位移和应变响应显著增大,其对结构的影响比一致激励时更为不利。不过,试验过程中模型均未出现开裂和破坏现象,表明钢管混凝土拱结构具有良好的抗震性能。
[Abstract]:In order to study the seismic response characteristics of concrete-filled steel tubular arch bridge, a concrete filled steel tube arch structure model with a scale of 1:10 scale was designed and fabricated by adopting the uniform similarity law of artificial mass in a concrete filled steel tube arch bridge as a prototype. Using the seismic simulation platform array system of Fuzhou University, longitudinal and transverse longitudinal ground motion tests were carried out by using sine wave excitation Taft wave and artificial wave generated by local site. The experimental results show that the transverse excitation of the Taft wave is less than that of the longitudinal excitation, but the artificial wave is the opposite. The acceleration of the arch is magnified relative to the arch foot, and the magnification is related to the excellent period of the input waveform, and the acceleration, displacement and strain response of the structure are significantly increased by multi-dimensional excitation and traveling wave excitation. The effect on the structure is more unfavorable than that under uniform excitation. However, no cracking and failure occurred in the model during the test, which indicates that the concrete filled steel tubular arch structure has good seismic performance.
【作者单位】：同济大学土木工程学院;福州大学土木工程学院;
【基金】：国家自然科学基金项目(51208111) 福建省教育厅科技项目(JA11023)
【分类号】：U441.3;U448.22

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