摘要
钢筋混凝土(RC)桥墩可能遭受车辆撞击等偶然作用,引起结构破坏甚至倒塌。该类撞击往往作用于桥墩靠近地面的位置,形成较小的剪跨比,并导致RC桥墩出现剪切为主的破坏模式。为了深入地理解近地端侧向加载下RC柱的剪切损伤机理和承载能力,在前期静力试验的基础上作了进一步的有限元分析,考察了轴压力、配箍率、纵筋配筋率和剪跨比等关键参数对RC柱的破坏模式、剪切承载力和变形能力的影响规律。采用AASHTO桥梁设计规范对该类RC柱的剪切承载能力进行了计算,并通过与有限元模拟结果的对比讨论了该方法的适用性,为后续建立更准确的小剪跨比RC柱剪切承载力计算方法奠定了基础。
Reinforced concrete(RC)piers may be subjected to accidental effects such as vehicle impact,resulting in structural damage or even collapse.This kind of impact often acts on the position of the pier close to the ground,resulting in a smaller shear-span ratio and leading to the shear-dominated failure mode of the RC pier.In order to deeply understand the shear damage mechanism and bearing capacity of RC columns under lateral loading near the ground,further finite element analysis is carried out on the basis of the previous static test.The influences of key parameters including axial compression force,stirrup ratio,longitudinal reinforcement ratio and shear-span ratio,on the failure mode,shear capacity and deformation capacity of the RC columns are investigated.In particular,the shear capacity of this type of RC columns is calculated using the AASHTO bridge design specifications,and the applicability of this method is discussed by comparing with the finite element simulation results,which lays a foundation for the subsequent establishment of a more accurate calculation method for the shear capacity of RC columns with small shear span ratios.
作者
吴冲
彭婷
陈林
刘涛
WU Chong;PENG Ting;CHEN Lin;LIU Tao(School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)
出处
《自然灾害学报》
CSCD
北大核心
2023年第3期48-56,共9页
Journal of Natural Disasters
基金
湖南省自然科学基金项目(2020JJ5177)
湖南省教育厅重点项目(21A0293)。
