钢管桩码头抗震设计中曲率延性指标的计算  

Calculation of curvature ductility index in seismic design of steel pipe pile wharf

作　　者：陶桂兰[1] 乔赵阳 阮健 TAO Gui-lan;QIAO Zhao-yang;RUAN Jian(College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing, Jiangsu 210098, China;CCCC Second Harbor Consultants Co.,Ltd.,Wuhan, Hubei 430071, China)

机构地区：[1]河海大学港口海岸与近海工程学院,江苏南京210098 [2]中交第二航务工程勘察设计院有限公司,湖北武汉430071

出　　处：《中国港湾建设》2017年第9期27-31,共5页China Harbour Engineering

基　　金：江苏省基础研究计划(自然科学基金)(BK20151498)

摘　　要：能够快速方便的计算得到高桩码头的曲率延性系数,对基于性能的高桩码头抗震设计具有重要意义。应用纤维模型法对高桩码头所采用的钢管桩进行了弯矩-曲率分析,计算了不同设计参数下钢管桩截面的等效屈服曲率以及不同极限状态下钢管桩截面的曲率,讨论了不同轴压比、壁厚对钢管桩截面等效屈服曲率和极限曲率的影响。在考虑了轴压比、壁厚和管径等因素的情况下,对钢管桩截面曲率进行拟合,获得了钢管桩的等效屈服曲率的计算回归公式以及不同设计极限状态下的曲率的计算回归公式。通过算例分析验证了所得回归公式的可靠性。同时导出了不同极限状态下钢管桩截面的曲率延性系数的计算公式,供工程设计人员参考。For the seismic design of high pile wharf based on performance,it is very important to calculate expediently thecurvature ductility factor of high pile wharf.The moment curvature analysis of steel piles used in high pile wharf was carried outby using the fiber model method,and then,the equivalent yield curvature under different design parameters and the curvatureunder different limit states of steel pipe pile sections were calculated.At the same time,the effects of axial compression ratioand wall thickness on the equivalent yield curvature and ultimate curvature of steel pipe pile sections were discussed.Afterconsideration of axial compression ratio,wall thickness and pipe diameter,the cross section curvature of steel pipe pile wasfitted,and the calculation regression formula of equivalent yield curvature and the calculation regression formulas of ultimatecurvature under different design limit states were obtained.The reliability of the obtained regression formula was verified byexample analysis.Finally,the calculation formula of the curvature ductility factor of steel pipe pile sections under different limitstates was derived as reference for engineering designers.

关 键 词：钢管桩码头 抗震设计 弯矩曲率分析 等效屈服曲率 极限曲率 曲率延性系数 回归公式 

分 类 号：U656.113[交通运输工程—港口、海岸及近海工程]