CCFDST长柱侧向冲击响应及刚塑性分析  

Lateral impact response and rigid plastic analysis of CCFDST long column

作　　者：潘爽 郭金龙 郭晓 PAN Shuang;GUO Jinlong;GUO Xiao(College of Transportation and Civil Engineering,Fujian Agriculture and Forestry University,Fuzhou 350002,China;School of Engineering,Fujian Jiangxia University,Fuzhou 350108,China;CSCEC Strait Construction and Development Co.,Ltd.,Fuzhou 350015,China)

机构地区：[1]福建农林大学交通与土木工程学院,福建福州350002 [2]福建江夏学院工程学院,福建福州350108 [3]中建海峡建设发展有限公司,福建福州350015

出　　处：《福建工程学院学报》2023年第3期218-224,共7页Journal of Fujian University of Technology

基　　金：福建省自然科学基金项目(2019J01885);福建江夏学院国家基金培育项目(JXZ2019003)。

摘　　要：采用有限元软件对圆中空夹层钢管混凝土(CCFDST)长柱构件进行侧向冲击数值模拟,揭示了CCFDST长柱构件冲击响应全过程工作机理,探究了空心率、长细比、冲击能量等参数对构件动力响应的影响。结果表明:CCFDST长柱构件的冲击力发展过程大致分为接触、震荡和下降3个阶段。动力冲击抗弯承载力提高系数随空心率、长细比的增大而降低,随冲击能量的增大而提高。基于刚塑性理论对构件冲击过程进行简化处理,提出了CCFDST长柱构件冲击抗弯承载力提高系数和跨中最大挠度计算公式。The circular concrete-filled double steel tube(CCFDST)long columns under lateral impact were simulated by using the finite element software.The mechanism of CCFDST members in the whole process was revealed,and the effects of parameters such as hollow ratio,slenderness ratio,and impact energy were explored.Results show that the development of the impact force can be divided into three stages:contacting,shocking and falling.The dynamic increase factor of impact-bending capacity decreases with the increase of hollow ratio and slenderness ratio but increases with the increase of impact energy.Based on the rigid plastic theory,the simplified analysis of the impact process of CCFDST members is conducted,and the formulas for impact-bending capacity and maximum mid-span deflection of circular CCFDST long column members are proposed.

关 键 词：CCFDST长柱 冲击响应 刚塑性分析 冲击抗弯承载力 跨中最大挠度 

分 类 号：TU398[建筑科学—结构工程]