Nonlinear analysis of post-tensioned prestressed concrete rocking walls
CSTR:
Author:
Affiliation:

(1.Key Lab of Earthquake Engineering and Engineering Vibration of China Earthquake Administration (Institute of Engineering Mechanics, China Earthquake Administration), Harbin 150080, China; 2.Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin 150090, China; 3.Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters (Harbin Institute of Technology),Ministry of Industry and Information Technology, Harbin 150090, China)

Clc Number:

TU378

Fund Project:

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    To analyze the characteristics of post-tensioned prestressed rocking walls in reducing the structural damage of the wall and the residual deformation after earthquakes through the opening and closing behaviors of the wall toe at the rocking interface, it is necessary to solve the key issues such as the local behavior of the wall toe nodes after the restraint is released, and the relationship between the stress change in the post-tensioned unbonded prestressed tendon and the rocking mechanism arranged along the entire length of the wall. Based on the idea of nonlinear macro-element, multiple axial compression springs were adopted to simulate the opening and closing behavior of the horizontal joint between the wall and the foundation interface as well as the mechanical characteristics of the joint area, and the co-rotating truss element was applied to simulate the force characteristics of the prestressed tendons. The multi-springs model of rocking wall under cyclic reciprocating loading was proposed based on OpenSees, and the simulated hysteresis characteristics, skeleton curve, and energy dissipation capacity were in good agreement with test results. The ratios of the calculated values of horizontal bearing capacity and ultimate deformation of three specimens to the test results were 1.2,0.6,1.061 and 0.3,0.8,0.995, respectively. The model could realize the high-precision prediction of the height of the compression zone reflecting the gap opening and closing of the wall toe, and could simulate the residual deformation and the stress change in the prestressed tendon reflecting its self-centering capacity. The analysis results show that residual lateral displacement ratios of the three post-tensioned prestressed concrete rocking wall specimens under the peak lateral displacement were only 0.060%, 0.121%, and 0.124%, respectively, and the structural damage was small. The energy dissipation capacity should be improved while ensuring the structural deformation and recovery capacity.

    Reference
    Related
    Cited by
Get Citation
Related Videos

Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:August 09,2021
  • Revised:
  • Adopted:
  • Online: March 21,2022
  • Published:
Article QR Code