Assessment of concrete–rock contact shear behaviour based on in situ shear tests

Q4 Earth and Planetary Sciences
M. Zoorabadi, T. G. Carter
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引用次数: 1

Abstract

Defining shear strengths of concrete–rock contacts is extremely important for designing concrete structures such as arch and gravity concrete dams that are constructed on rock. Assessment of 34 large-scale in situ direct shear tests conducted on concrete–rock contacts of various roughnesses is presented in this paper. Evaluation of the peak strength results at moderate-to-low stress ranges, indicates that a non-linear trend with maximum at moderate roughness (joint roughness coefficient, JRC = 11–12) can reasonably represent relationships between peak and apparent shear strengths, shear stiffness and shear displacement relationships with respect to JRC. Apparent residual strength parameters appear to show a more linear Mohr–Coulomb to slightly non-linear trend with JRC and applied normal stress.
基于现场剪切试验的混凝土-岩石接触剪切性能评价
确定混凝土-岩石接触的抗剪强度对于设计混凝土结构非常重要,例如建造在岩石上的拱坝和重力混凝土坝。本文对34次不同粗糙度混凝土-岩石接触的大型原位直剪试验进行了评价。对中低应力范围内峰值强度结果的评价表明,在中等粗糙度(节理粗糙系数,JRC = 11-12)下,峰值与表观抗剪强度、抗剪刚度和抗剪位移之间的关系可以合理地反映出JRC的非线性趋势。随JRC和施加法向应力的增加,表观残余强度参数表现出较线性的莫尔-库仑曲线到略非线性的趋势。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Dams and Reservoirs
Dams and Reservoirs Earth and Planetary Sciences-Geotechnical Engineering and Engineering Geology
CiteScore
0.50
自引率
0.00%
发文量
30
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