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Experiment on Seismic Performance of Rammed Earth Wall with Vertical Pin(PDF)

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

Issue:
2018年03期
Page:
79-86
Research Field:
Publishing date:

Info

Title:
Experiment on Seismic Performance of Rammed Earth Wall with Vertical Pin
Author(s):
LIU Qiang TONG Li-ping XU Qi-keng
School of Civil Engineering, Zhengzhou University
Keywords:
rammed earth wall vertical pin low cyclic loading seismic performancerebar planting rateductility
PACS:
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DOI:
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Abstract:
In order to analyze the seismic performance of rammed earth walls with vertical pin quantitatively, the low cyclic loading tests on six rammed earth walls with vertical pin were carried out, and the failure process and failure forms of rammed earth walls were analyzed. Taking the rebar planting rate and the diameter of vertical pins as parameters, the seismic performances, such as hysteresis curves, skeleton curves, bearing capacity and deformation, stiffness degradation law, energy dissipation capacity, were studied. The results show that the rammed stratification is the weak link of rammed earth walls. The vertical pin has little influence on the lateral bearing capacity of rammed earth walls, and has a significant improvement on ductility. With the increase of the rebar planting rate, the ductility coefficient increases firstly and then decreases. With the vertical pin diameter increasing, the ductility coefficient decreases gradually. The vertical pin weakens the initial stiffness of the rammed earth wall and has no obvious influence on the trend of the stiffness degradation, and the vertical pin can significantly enhance the energy dissipation capacity of rammed earth wall. The fluctuation of the equivalent viscous damping coefficient with the loading process is obvious; under the condition of the limit displacement, the equivalent viscous damping coefficient is in the range of 0.13-0.24. The Study results can provide a theoretical basis for indepth understanding the seismic performance of rammed earth wall with vertical pin and its practical application.

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Last Update: 2018-05-31