[1]林上顺,何乐,夏樟华,等.榫卯-灌浆套筒混合连接装配式方墩轴压承载力[J].郑州大学学报(工学版),2022,43(03):67-72.
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榫卯-灌浆套筒混合连接装配式方墩轴压承载力()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
43
期数:
2022年03期
页码:
67-72
栏目:
出版日期:
2022-04-10

文章信息/Info

Title:
Tenon-grouting Sleeve Connection Fabricated Square Pier Axial Compression Bearing Capacity
作者:
林上顺何乐夏樟华张乐彤叶世集陈治雄
文献标志码:
A
摘要:
采用ABAQUS 软件,通过合理地挑选材料本构、单元类型,划分网格,建立边界条件,提出一种榫卯-灌浆套筒混合连接装配式方墩的有限元计算模型。该模型模拟了方墩在轴压荷载作用下的受力过程,与试验所得混凝土破坏形态,轴压极限承载力进行对比,分析了内部钢筋、钢管与灌浆套筒的受力状态,验证了所提模型的精度。在此基础上,以钢管混凝土(CFST)突榫中钢管的长度、厚度、直径为变量进行试验,结果表明:所提模型可以较好地模拟榫卯-灌浆套筒混合连接装配式方墩轴压过程,有限元计算得出的极限承载力与试验结果的比值的均值与方差分别为1.036和0.023增大CFST突榫中钢管的长度、直径可以明显提高榫卯-灌浆套筒连接装配式桥墩的极限承载力,改变CFST突榫中钢管厚度使榫卯-灌浆套筒连接装配式桥墩的极限承载力呈先增大后减小的趋势,但相对于改变钢管的长度、直径来说影响甚微提出地榫卯-灌浆套筒连接装配式方墩的轴压承载力简化计算公式,其计算结果均略低于试验和有限元参数分析的结果,与试验结果的相对误差均值为9.01% ,与有限元计算结果的误差均值为4.05%,误差较小,可用于该类型方墩的轴压承载力计算。
Abstract:
Using ABAQUS software,the finite element calculation model of square piers with tenon-groutingsleeve mixed connection was put forward by selecting material constitutive model and element type reasonably ,dividing mesh and establishing boundary condition. The failure mode of concrete and the ultimate bearing ca-pacity of concrete under axial load were compared with the test results, and the accuracy of finite element cal-culation was verified,the stress state of internal steel bar,steel pipe and grout sleeve was analyzed as thepressure increased.On this basis,taking the design parameters of CFST tenon ( concrete-filled steel tube ten-on ) as the variables,the influence of the variables on the axial compression performance of the short pie of tenon-grouting sleeve hybrid connection was further studied,the results showed that the proposed finite ele-ment model could simulate the axial compression process of the square piers with tenon-grouting sleeve joint ,the mean and variance of the ultimate bearing capacity calculated by finite element method and the test results were 1.036 and 0.023,respectively. Increasing the length and diameter of CFST tenon steel pipe could obvi-ously increase the ultimate bearing capacity of the mortise-grouting sleeve connection bridge pier,the changeof the thickness of CFST tenon steel tube had an increasing and decreasing trend for the ultimate bearing ca-pacity of mortise-tenon-grout sleeve bridge pier, but it has little effect on the length and diameter of steel tube.Iln this studly , a simplified formula for calculating the axial bearing capacity of square piers with mortise-tenon-grouted sleeve connection was presented. The calculated results were slightly lower than the results of tests andfinite element analysis , and the average error between the calculated results and the experimental results was9.01% , the error was 4.05% , and the error was small. It could be used to calculate the axial bearing capaci-ty of this type of pier.

更新日期/Last Update: 2022-05-02