|Table of Contents|

Seismic Behavior of Unbonded Prestressed Tendon Precast Shear Walls with Energy Dissipation Angle Steel(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2019年03期
Page:
74-82
Research Field:
Publishing date:

Info

Title:
Seismic Behavior of Unbonded Prestressed Tendon Precast Shear Walls with Energy Dissipation Angle Steel
Author(s):
HUANG Yuan1; 2;  YI Zhan-hui 1; 2
(1. Hunan Provincial Key Laboratory on Damage Diagnosis for Engineering Structures, Hunan University, Changsha 410082, Hunan, China; 2. College of Civil Engineering, Hunan University, Changsha 410082, Hunan, China))
Keywords:
unbonded prestress;  precast shear;  energy dissipation angle steel;  seismic performance
PACS:
TU378.1
DOI:
-
Abstract:
The connection details of traditional unbonded prestressing tendon(UPT)prefabricated walls were improved. The energy dissipation angle steel was installed at the toe of the wall to improve the lateral bearing capacity and energy dissipation capacity of the members. The element model of UPT prefabricated shear wall with energy dissipation angle steel was built using finite element software MSC. Marc. The accuracy and rationality of parameters setting in finite element model, such as unbonded prestressed tendons, energy dissipation angle steel constitutive model and contact, were verified by experimental data of energy dissipation angle steel and unbonded prestressed wall. The effects of tension control stress, position of prestressing tendon, axial compression ratio, parameter setting and wall height on ductility and lateral bearing capacity of UPT wall with energy dissipation angle steel were studied by parameter analysis. The results show that compared with the UPT wall without the energy dissipation angle steel, the lateral bearing capacity of UPT wall with angle steel is significantly improved. The steel angle can effectively reduce the maximum stress of prestressed tendons. With the increase of the thickness of the energy dissipation angle steel or the decrease of the distance between the vertical horizontal group bolts and the outer edge of angle steel, the lateral bearing capacity of the wall will increase. The eccentricity ratio of prestressing tendons is smaller and the ductility is better. The larger eccentricity ratio can improve the lateral bearing capacity of the wall, but it will greatly reduce the ductility of the wall, which is not conducive to improving the seismic performance of the wall.

References:


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Last Update: 2019-05-23