侧向撞击荷载作用下方套方形钢管混凝土叠合柱动力响应的数值研究  

Numerical study on the dynamic response of square set square steel tube-reinforced concrete(ST-RC)columns under the lateral impact loading

作　　者：王刚[1] 包延红 WANG Gang;BAO Yanhong(School of Civil Engineering and Water Resources,Qinghai University,Xining 810016,China)

机构地区：[1]青海大学土木水利学院,青海西宁810016

出　　处：《青海大学学报》2023年第6期32-40,共9页Journal of Qinghai University

基　　金：青海省科学技术厅项目(2019-ZJ-971Q)。

摘　　要：为研究方套方形钢管混凝土叠合柱在侧向撞击荷载作用下的动力响应,本文基于有限元软件ABAQUS,建立了方套方形钢管混凝土叠合柱撞击模型,并通过已有的试验数据验证了模型的可靠性。在此基础上,利用该模型分析在侧向撞击荷载作用下方套方形钢管混凝土叠合柱的撞击力响应和动力变形。结果表明:(1)叠合柱在撞击荷载作用下的破坏模式主要包括撞击点位损伤型、叠合柱损伤型、撞击点位破坏型;(2)跨中位移随着撞击速度、撞击质量增大而增大,随着叠合柱自身刚度增加而减小,撞击力峰值、撞击力平台值受各参数影响各有不同的规律;(3)跨中位移和残余位移受撞击体的影响比自身材料和刚度的影响更加明显。研究结果可为该类结构的抗撞性能研究提供参考。In order to explore the dynamic response of square set square steel tube-reinforced con-crete(ST-RC)columns under the lateral impact loading,an impact model of square set square ST-RC columns is established based on the finite element software ABAQUS.The reliability of the model is verified by the existing test data.The model is used to analyze the impact force response and dynamic deformation of square set square ST-RC columns under the lateral impact loading.The results indicate that:(1)The failure modes of the columns under the impact loading mainly include impact point damage,columns damage and impact point failure;(2)The mid-span displacement increases with the increase of impact velocity and mass,while decreases with the increase of stffness of the columns.The peak and platform values of impact force have different rules due to the influence of various parameters;(3)The mid-span displacement and residual displacement are more obviously affected by the impact body than by its own material and stiffness.The research results can provide reference for the study of anti-collision performance of this kind of structure.

关 键 词：钢管混凝土叠合柱 侧向撞击荷载 动力响应 数值模拟 参数分析 

分 类 号：TU398[建筑科学—结构工程]