PVC-CFRP管混凝土柱-RC环梁十字形节点滞回特性数值模拟研究  

Numerical study on hysteresis behavior of PVC-CFRP confined concrete column-RC ring beam interior joint

作　　者：于峰[1] 麦麦提·努尔麦麦提 方圆[1] 张楠楠 YU Feng;MAIMAITI Nuermaimaiti;FANG Yuan;ZHANG Nannan(College of Civil Engineering,Anhui University of Technology,Ma’anshan,243002,China)

机构地区：[1]安徽工业大学建筑工程学院,马鞍山243002

出　　处：《复合材料科学与工程》2023年第12期63-71,共9页Composites Science and Engineering

基　　金：国家自然科学基金(51878002,52078001);安徽省杰出青年科学基金(2008085J29);安徽省科技重大专项项目(202203a07020005);安徽省重点研究与开发计划项目(2022i01020005);安徽高校自然科学研究项目(YJS20210351)。

摘　　要：在试验研究基础上,选择合适的材料本构关系,采用纤维模型法,对低周反复荷载作用下PVC-CFRP管混凝土柱-钢筋混凝土环梁节点的荷载-位移及弯矩-曲率骨架曲线进行全过程分析。在验证模型准确性的基础上,研究核心区混凝土强度、环梁高度、柱直径和梁纵筋配筋率对试件骨架曲线的影响规律。结果表明,随着环梁高度、柱直径和梁纵筋配筋率的增加,试件的承载力和延性增大。随着核心区混凝土强度的增加,节点的承载力提高而延性有所降低。基于试验与数值模拟的分析结果,考虑环梁节点经济性与合理性,建议节点区混凝土强度不宜超过C60,环梁高度宜取340~440 mm,环梁宽度与柱直径的比值宜控制在0.33~0.50之间。Based on the experimental study,the appropriate constitutive models are selected and the fiber model method is adopted to analysis the load-displacement and moment-curvature skeleton curves of PVC-CFRP confined concrete column-RC ring beam interior joints under low cyclic loading.The influence of the concrete strength of joint area,ring beam height,column diameter and longitudinal reinforcement ratio of frame beam on the skeleton curves of the specimens are investigated on the basis of the verified accurate numerical model.The results show that the bearing capacity and ductility of the specimens increase with the increase of frame beam height,column diameter and longitudinal reinforcement ratio of frame beam.The bearing capacity of the specimens increases while the ductility decreases with the improvement of concrete strength of joint area.On the basis of the analysis results of the test and numerical simulation,considering the economy and rationality of the ring beam joints,it is suggested that the concrete strength of the joint area should not exceed C60,the height of the ring beam should be 340~440 mm,and the ratio of the ring beam width to the column diameter should be controlled between 033~050.

关 键 词：PVC-CFRP管约束混凝土 环梁节点 数值模拟 荷载-位移关系 弯矩-曲率关系 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]