考虑扭转效应的全直桩码头动力简化计算方法

Simplified dynamic calculation method for all-vertical-piled wharf considering torsional effect

基于基桩+刚性平台空间简化计算模型,在考虑扭转效应的情况下对全直桩码头结构抗震响应进行分析,提出在水平地震荷载作用下全直桩码头整体结构简化计算方法。通过与水运规范法、有限元法进行对比分析,验证所提算法的合理性。结果表明,该算法的计算精度可以满足结构设计分析的需要,能合理反映结构平动扭转耦联效应。当结构平面质量中心与刚度中心不重合时,应采用平动扭转耦联振型分解法计算地震作用及其效应。地震方向平行于结构平面刚度中心与质量中心的连线时,平台不产生扭转;地震方向垂直于刚度中心与质量中心的连线时,平台扭转效应最大。

Based on the pile-rigid platform spatial simplified calculation model, the seismic response of an all- vertical-piled wharf structure was analyzed considering the torsional effect, and a simplified calculation method for the all-vertical-piled wharf under horizontal seismic loads was developed. The method was verified through comparison of the results obtained from the method with standards and the results of the finite element method. The results show that the precision of the proposed method can meet structural design requirements, and the method can reflect the translation-torsion coupling effect of structures. When a structure＇ s center of mass and its center of rigidity are not coincident, the seismic load and effect should be calculated with the translation-torsion coupling mode-superposition method. When the seismic direction is parallel to the line connecting the center of rigidity and the center of mass, the platform does not produce torsion; when the seismic direction is perpendicular to the line connecting the center of rigidity and the center of mass, the torsion effect of the platform is at its maximum.