Journal of Jilin University(Engineering and Technology Edition) ›› 2024, Vol. 54 ›› Issue (12): 3545-3551.doi: 10.13229/j.cnki.jdxbgxb.20230989

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Seismic resistance monitoring of assembly joints of corroded reinforced concrete columns under heavy rainfall environment

Min SUN1(),Yuan-heng ZHU1,Peng-zhen GAO1,Zhen-dong LI2,You-zhen FANG1   

  1. 1.School of Civil Engineering，Suzhou University of Science and Technology，Suzhou 215011，China
    2.The School of Civil Engineering and Transportation，Hohai University，Nanjing 210000，China
  • Received:2023-09-15 Online:2024-12-01 Published:2025-01-24

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Abstract:

In order to ensure the safety of the building， a method for monitoring the seismic resistance of the assembly joints of corroded reinforced concrete column under heavy rainfall was proposed. Firstly， the reasons for the corrosion of reinforced concrete columns caused by heavy rainfall environment were analyzed， and the deterioration degree of reinforced concrete columns caused by rain rust was calculated.Then， in order to clarify the influence of rain rust on the seismic resistance of reinforced concrete columns， four reinforced concrete specimens with different degrees of corrosion were constructed with reference to the design standards for reinforced concrete structures in the construction industry. The four specimens were placed in a pseudo-static experimental environment， and different vibration environments were simulated by loading different degrees of loads. Finally， by combining the calculation of hysteresis curves， skeleton curves， and inter story displacement angles， the seismic performance analysis of different specimens under the same vibration environment was achieved.

Key words: rust deterioration, quasi static experiment, load loading, hysteresis curve, skeleton curve

CLC Number: 

  • TU352.11

Fig.1

Corrosion principle of reinforced concrete"

Fig.2

Structural diagram of reinforced concrete assembly nodes"

Table 1

Mechanical parameters of steel reinforcement structure"

钢材

类别

钢材厚度/mm弹性模拟/GPa伸长率/%屈服强度/MPa极限强度/MPa
HRB400820015.3413.6652.3
HRB4001020017.3426.0580.6
HRB4001220021.6435.5576.1
HRB4001420023.7469.5570.2
HRB4001620024.8426.3618.5
HRB4002220020.3429.9581.9
HRB4002520019.4455.1612.4

Fig.3

Schematic diagram of loading and assembly"

Fig.4

Schematic diagram of loading system"

Fig.5

Hysteresis curve of specimen"

Fig.6

Comparison results of skeleton curves"

Fig.7

Schematic diagram of hysteresis loop"

Table 2

Changes in interlayer displacement angle"

层间位移角阻尼系数计算结果
RCJ1RCJ2RCJ3
15-10.5220.4630.392
20-10.4130.3510.303
25-10.3610.2510.241
30-10.3030.2070.193
35-10.2540.1930.186
40-10.2360.1830.152
45-10.1970.1230.115
50-10.1750.1030.096
55-10.1360.0750.048
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