震区圆柱式桥梁墩柱配筋率取值范围分析  

The value range of reinforcement ratio of cylindrical pier in seismic area

作　　者：张玥[1] 兰方言 赵丹 周敉[3] ZHANG Yue;LAN Fang-yan;ZHAO Dan;ZHOU Mi(College of Architecture and Civil Engineering,Xian University of Science and Technology,Xi'an 710054,China;Engineering design and Research Institute of Chang'an University Xi'an710054,China;Key Laboratory for Bridge and Tunnel Engineering of Shanxi,Chang’an University,Xi'an 710054,China)

机构地区：[1]西安科技大学建筑与土木工程学院,陕西西安710054 [2]长安大学工程设计研究院有限公司,陕西西安710054 [3]长安大学桥梁与隧道陕西省重点实验室,陕西西安710054

出　　处：《广西大学学报（自然科学版）》2018年第6期2311-2321,共11页Journal of Guangxi University（Natural Science Edition）

基　　金：陕西省重点研发计划项目(2018SF-359);陕西省自然科学基础研究计划项目(2018JQ5019)

摘　　要：为研究配筋率对圆柱式钢筋混凝土桥墩延性抗震性能影响,基于实际工程项目设置多个不同纵筋率和配箍率的工况,利用有限元软件进行数值模拟,通过分析增加纵筋率后试件位移延性系数、耗能能力和刚度的变化趋势,确定出试件具有较优抗震性能的纵筋率范围为0. 82%～2. 51%;通过分析不同纵筋率与配箍率相互作用对试件位移延性系数、耗能能力和刚度的变化趋势的影响可知,增大纵筋率将提高桥墩的承载力,且配箍率越大,增加纵筋率对试件极限承载力提升效果越明显。此外,墩柱纵筋率和配箍率都较低时不利于结构抗震。The objective of this study is to investigate the effect of different reinforcement ratios on the ductility and seismic behaviors of cylindrical reinforced concrete pier.Several different longitudinal reinforcement ratios and stirrup ratios are set up on the basis of actual engineering projects.Finite element software is used for numerical simulation.By analyzing the variation trend of displacement ductility coefficient,energy dissipation capacity,and stiffness with increasing longitudinal reinforcement ratio,the range of longitudinal reinforcement ratio with better seismic performance is determined to be 0.82%~2.51%.By analyzing the influence of the interaction between different longitudinal reinforcement ratios and stirrup ratios on the variation trend of displacement ductility coefficient,energy dissipation capacity,and stiffness of specimens,it can be concluded that increasing the longitudinal reinforcement ratio raises the bearing capacity of piers.The greater the stirrup ratio,the more obvious the effect of increasing the longitudinal reinforcement ratio on the ultimate bearing capacity of specimens.In addition,the longitudinal reinforcement ratio and stirrup ratio of pier are relatively low,which is not conducive to structural earthquake resistance.

关 键 词：钢筋混凝土桥墩 延性性能 低周反复荷载 纵筋率 

分 类 号：U444[建筑科学—桥梁与隧道工程]