Journal of Jilin University(Engineering and Technology Edition) ›› 2023, Vol. 53 ›› Issue (6): 1601-1611.doi: 10.13229/j.cnki.jdxbgxb.20230095

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Ultimate bearing capacity of temporary⁃permanent conversion rush⁃repair steel pier for emergency use

Zi-yu LIU1,2(),Shi-tong CHEN1,2,3(),Mo-mo ZHI1,2,3,Xiao-ming HUANG4,Zhe-xin CHEN5   

  1. 1.Collaborative Innovation Center for Performance and Security of Large-scale Infrastructure，Shijiazhuang Tiedao University，Shijiazhuang 050043，China
    2.Hebei Eng. Research Center for Traffic Emergency and Guarantee，Shijiazhuang Tiedao University，Shijiazhuang 050043，China
    3.State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures，Shijiazhuang Tiedao University，Shijiazhuang 050043，China
    4.School of Transportation，Southeast University，Nanjing 210096，China
    5.Jinan Kingyue Highway Engineering Company Limited，Jinan 250101，China
  • Received:2023-02-02 Online:2023-06-01 Published:2023-07-23
  • Contact: Shi-tong CHEN E-mail:2202101008@student.stdu.edu.cn;chst@stdu.edu.cn

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Abstract:

A temporary-permanent conversion rush-repair steel pier was developed. Based on ABAQUS three-dimensional simulation， the selection of main material was determined by analyzing the influence factors of ultimate bearing capacity. On this basis， the ultimate bearing capacity of steel pier structures in non-damaged and damaged state was studied. The results show that， the ultimate load bearing capacity of steel pier decreases with the increase of pier diameter to thickness ratio and increases with the increase of steel strength grade. When steel pier damage position is same， the deeper the damage degree is， the more sensitive the ultimate load coefficient is. When the damage degree of steel pier is same， the closer the damage position is to the bottom， the more significant the influence on the ultimate load coefficient is. In the local segmental damage， compared with material stiffness degradation， with the change of reduction coefficient， the impact of section size reduction and material strength degradation on the ultimate load coefficient is similar and more obvious. In the overall damage， the reduction of cross section size has the greatest effect， followed by material strength degradation and material stiffness degradation.

Key words: bridge engineering, rush-repair steel pier, temporary-permanent conversion, ultimate bearing capacity, emergency use

CLC Number: 

  • U24

Fig.1

Diagram of temporary-permanent conversion rush-repair steel pier"

Fig.2

Space model of emergency repair steel pier"

Fig.3

Schematic diagram of load"

Fig.4

Ultimate load coefficient and ultimate displacement at different diameter to thickness ratios"

Fig.5

Ratio of diameter-thickness to specific gravity of different factors"

Fig.6

Ultimate load factor under different steel materials"

Table 1

Load condition under normal service condition"

工况荷载组合荷载图式
DG1

双孔重载

（ZKH单列）

DG2

双孔重载

（抢修单列）

Fig.7

Ultimate load factor under normal service condition"

Table 2

Load condition under eccentric compressive"

工况荷载组合荷载图式偏压方式
B1

单孔轻载

（ZKH双列）

单压
B2

单孔重载

（ZKH双列）

单压
B3

单孔轻载

（抢修双列）

单压
B4

单孔重载

（抢修双列）

单压
B5

单孔轻载

（ZKH单列）

双压
B6

单孔重载

（ZKH单列）

双压
B7

单孔轻载

（抢修单列）

双压
B8

单孔重载

（抢修单列）

双压

Fig.8

Ultimate load factor under unidirectional eccentric compressive behavior"

Fig.9

Ultimate load factor under bidirectional eccentric compressive behavior"

Fig.10

Ultimate load factor at different damage locations"

Fig.11

Ultimate displacement at different damage locations"

Fig.12

Displacement-live load factor curves at different damage locations"

Fig.13

Boundary failure condition"

Fig.14

Ultimate load factor of missing connection system"

Fig.15

Ultimate load factor and ultimate displacement of local damage"

Fig.16

Ultimate load factor and ultimate displacement of segment damage"

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