Tenon-grouting Sleeve Connection Fabricated Square Pier Axial Compression Bearing Capacity

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Tenon-grouting Sleeve Connection Fabricated Square Pier Axial Compression Bearing Capacity

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[1]LIN Shangshun,HE Yue,XIA Zhanghua,et al.Tenon-grouting Sleeve Connection Fabricated Square Pier Axial Compression Bearing Capacity[J].Journal of Zhengzhou University (Engineering Science),2022,43(03):67-72.[doi:10.13705/j.issn.1671-6833.2022.03.008]

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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 43 Number of periods: 2022 03 Page number: 67-72 Column: Public date: 2022-04-10

Title:: Tenon-grouting Sleeve Connection Fabricated Square Pier Axial Compression Bearing Capacity

Author(s):: LIN Shangshun¹; HE Yue1; XIA Zhanghua²; ZHANG Letong²; YE Shiji¹; CHEN Zhixiong³; 1.Fujian Provincial Key Laboratory of Advanced Technology and Information in Civil Engineering, Fujian University of Engineering, Fuzhou 350118, China;
2.School of Civil Engineering, Fuzhou University, Fuzhou 350108, China;
3.Fujian Rongsheng Municipal Engineering Co., Ltd.，Fuzhou 350011, China

Keywords:: fabricated square pier; ultimate axial bearing capacity; finite element model; parameter analysis; calculation formula

CLC:: TU312+. 1

DOI:: 10.13705/j.issn.1671-6833.2022.03.008

Abstract:: Using ABAQUS software, the finite element calculation model of square piers with tenon-grouting sleeve 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 capacity of concrete under axial load were compared with the test results, and the accuracy of finite element calculation was verified, the stress state of internal steel bar, steel pipe and grout sleeve was analyzed as the pressure increased.On this basis, taking the design parameters of CFST tenon(concrete-filled steel tube tenon)as the variables, the influence of the variables on the axial compression performance of the short pier of tenon-grouting sleeve hybrid connection was further studied, the results showed that the proposed finite element 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 obviously increase the ultimate bearing capacity of the mortise-grouting sleeve connection bridge pier, the change of the thickness of CFST tenon steel tube had an increasing and decreasing trend for the ultimate bearing capacity of mortise-tenon-grout sleeve bridge pier, but it has little effect on the length and diameter of steel tube.In this study, 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 and finite element analysis, and the average error between the calculated results and the experimental results was 9.01%, the error was 4.05%, and the error was small.It could be used to calculate the axial bearing capacity of this type of pier.

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Last Update: 2022-05-02