Structural Safety Control of Masonry Buildings: Non-Linear Static Seismic Analysis with a Non-Linear Shear Strength Criterion

2012 ◽  
Author(s):  
D. Foti ◽  
M. Debernardis ◽  
V. Paparella
Keyword(s):  
Shear Strength ◽  
Seismic Analysis ◽  
Strength Criterion ◽  
Structural Safety ◽  
Masonry Buildings ◽  
Safety Control ◽  
Shear Strength Criterion ◽  
Non Linear ◽  
Linear Shear

scholarly journals A New Shear Strength Criterion for Rock Masses with Non-Persistent Discontinuities Considering the Nonlinear Progressive Failure Process

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4694
Author(s):  
Bowen Zheng ◽  
Shengwen Qi ◽  
Songfeng Guo ◽  
Xiaolin Huang ◽  
Ning Liang ◽  
...  
Keyword(s):  
Shear Strength ◽  
Friction Coefficient ◽  
Progressive Failure ◽  
Strength Criterion ◽  
Rock Masses ◽  
Basic Form ◽  
Shear Strength Criterion ◽  
Nonlinear Shear ◽  
New Criterion ◽  
Internal Friction Coefficient

The shear strength characteristics of rock masses containing non-persistent discontinuities are strongly affected by discontinuities and rock bridges. The linear Jennings criterion cannot reflect the nonlinear mechanical behavior during progressive failure of rock masses with non-persistent discontinuities. In this study, a new nonlinear shear strength criterion was developed. First of all, a series of shear test data about artificial rock mass samples were collected on the basis of the published literatures, and five types of samples were differentiated according to the positions of discontinuities. After that, a new nonlinear shear strength criterion was proposed by introducing two correction coefficients A and B into the basic form of the Jennings criterion, which could correct the weight of the cohesion and the internal friction coefficient of rock bridges respectively. Then, the new criterion was determined by fitting the basic form of the Jennings criterion with the laboratory data. It was found that the parameters A and B had a nonlinear exponential and negative exponential relation with the connectivity rate respectively. It indicated that both the cohesion and the internal friction coefficient estimated by the new criterion were superior to those estimated by the Jennings criterion. Compared with the linear Jennings criterion, the new nonlinear shear strength criterion had a better applicability.

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