Influence of Joint Stiffness After Gap Opening on Seismic Performance of Self-Centering Prestressed Concrete Frames with Variable Friction Dampers

HUANG Linjie; ZENG Bin; ZHOU Zhen; ZHANG Wenqing; SANG Chenxu; ZHANG Jingru

doi:10.13204/j.gyjzG22072916

Volume 52 Issue 12

Dec. 2022

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2022 > 52(12): 88-93

HUANG Linjie, ZENG Bin, ZHOU Zhen, ZHANG Wenqing, SANG Chenxu, ZHANG Jingru. Influence of Joint Stiffness After Gap Opening on Seismic Performance of Self-Centering Prestressed Concrete Frames with Variable Friction Dampers[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(12): 88-93. doi: 10.13204/j.gyjzG22072916

Citation:

HUANG Linjie, ZENG Bin, ZHOU Zhen, ZHANG Wenqing, SANG Chenxu, ZHANG Jingru. Influence of Joint Stiffness After Gap Opening on Seismic Performance of Self-Centering Prestressed Concrete Frames with Variable Friction Dampers[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(12): 88-93. doi: 10.13204/j.gyjzG22072916

Citation:

HUANG Linjie, ZENG Bin, ZHOU Zhen, ZHANG Wenqing, SANG Chenxu, ZHANG Jingru. Influence of Joint Stiffness After Gap Opening on Seismic Performance of Self-Centering Prestressed Concrete Frames with Variable Friction Dampers[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(12): 88-93. doi: 10.13204/j.gyjzG22072916

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Influence of Joint Stiffness After Gap Opening on Seismic Performance of Self-Centering Prestressed Concrete Frames with Variable Friction Dampers

doi: 10.13204/j.gyjzG22072916

1. College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China;
2. Central Research Institute of Building and Construction, MCC Group, Beijing 100088, China;
3. Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education, Southeast University, Nanjing 210096, China

Received Date: 2022-08-30
Available Online: 2023-03-22

Abstract

Abstract

Due to the decrease of the joint stiffness after gap opening for the self-centering prestressed concrete (SCPC) frames, the inter-story drift of structures under rare earthquakes has increased obviously. The SCPC beam-to-column joints with variable friction dampers (VFD), characterized by a third stiffness, is useful to improve the stiffness of structures under major earthquakes, so as to decrease the inter-story drift of structures. A VFD-SCPC frame located in the area with a seismic fortification intensity of eight degree was taken as the analytical case. The numerical model was established via nonlinear finite software OpenSees, and 12 earthquake waves were used as the excitation to study the influence of the connection stiffness after gap opening, including the second and third stiffness, on the seismic performance of VFD-SCPC frames. The results showed that increasing the second stiffness could reduce the inter-story drift for entire structures, while the distribution of lateral deformation could not be changed. While increasing the third stiffness was not only useful to decrease the inter-story drift and column moment, but also beneficial to decrease the higher mode effect so as to decrease the deformation of higher stories, guaranteeing the expected re-centering effect.
- joint stiffness after gap opening,
- self-centering prestressed concrete,
- variable friction,
- higher modal

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References(11)

References

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