Ultimate bearing capacity of a strip foundation near slopes based on the unified strength theory

2021 ◽  
Vol 14 (21) ◽  
Author(s):  
Qing Yan ◽  
Junhai Zhao ◽  
Changguang Zhang
Keyword(s):  
Bearing Capacity ◽  
Ultimate Bearing Capacity ◽  
Strip Foundation ◽  
Strength Theory ◽  
Unified Strength Theory

Ultimate Bearing Capacity Analysis of Axially Compressive Circular Steel Tube Columns Filled with Bar-Reinforced Concrete

2011 ◽  
Vol 94-96 ◽  
pp. 1205-1210
Author(s):  
Zhao Liu ◽  
Jun Hai Zhao
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Steel Tube ◽  
Ultimate Bearing Capacity ◽  
Strength Theory ◽  
Principal Stresses ◽  
Unified Strength Theory ◽  
Short Columns ◽  
Circular Steel Tube ◽  
Circular Bar

The mechanical behavior and ultimate bearing capacity of the circular bar-reinforced concrete filled steel tube (BRCFST) short columns under axial compression are analyzed in this paper based on the unified strength theory. Considering the restriction effect of steel tube and hoop bar on concrete, the calculation formula of bearing capacity of the column is deduced. Parametric studies are carried out to evaluate the effects of intermediate principal stresses, diameter-thickness ratio of steel tube and the stirrup ratio on the bearing capacity of the column. A good agreement is reached by comparing the results calculated by the formula with the test results. It is concluded that the unified strength theory is applicable in the theoretical analyses of the BRCFST columns.

Study on the Axial Ultimate Bearing Capacity of Concrete-Filled Square Steel Tubular Stub Columns

2013 ◽  
Vol 690-693 ◽  
pp. 742-746
Author(s):  
Peng Wu ◽  
Jian Feng Xu ◽  
Jun Hai Zhao ◽  
Qian Zhu ◽  
Su Wang
Keyword(s):  
Experimental Data ◽  
Bearing Capacity ◽  
Steel Tube ◽  
Ultimate Bearing Capacity ◽  
Strength Theory ◽  
Constraint Effect ◽  
Unified Strength Theory ◽  
Square Steel Tube ◽  
Core Concrete ◽  
Stub Columns

Based on unified strength theory, the mechanical behavior of core-concrete of concrete-filled square steel tubular stub columns was analyzed. Through controlling the constraint effect between square steel tube and core-concrete by width-thickness ratio, the ultimate bearing capacity formula for concrete-filled square steel tubular stub columns under axial compression was proposed, and the influencing factors of which was also discussed. The rationality of proposed formula was proved from the comparison of the analytical results obtained in this paper and experimental data.

Study on Ultimate Bearing Capacity of Reinforced Concrete Columns Combined with FRP

2011 ◽  
Vol 94-96 ◽  
pp. 820-825
Author(s):  
Sai Wu ◽  
Jun Hai Zhao ◽  
Xue Ying Wei
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Concrete Columns ◽  
Ultimate Bearing Capacity ◽  
Axial Loads ◽  
Strength Theory ◽  
Rc Columns ◽  
Reinforced Concrete Columns ◽  
Unified Strength Theory ◽  
Good Agreement

This paper based on the unified strength theory, analyzed the ultimate bearing capacity of the reinforced concrete columns combined with FRP under axial loads. First, analyzed the mechanical property of the RC columns combined with FRP. Second, based on the unified strength theory, deduced the three-direction compressive stress of the core concrete and got the unified formula for calculating the ultimate bearing capacity of RC columns combined with FRP. Last, compared the analytical results obtained in this paper with the relevant experimental data, good agreement can be found and it proved the good applicability of the formula. Comparing with other methods in calculating the ultimate bearing capacity of RC columns combined with FRP，this method is well-founded, so it has a significant value in analysis of RC columns combined with FRP.

CALCULATION OF THE ULTIMATE BEARING CAPACITY OF SOIL SLOPE BASED ON THE UNIFIED STRENGTH THEORY

2008 ◽  
Vol 22 (31n32) ◽  
pp. 5637-5642 ◽  
Author(s):  
HONGJIAN LIAO ◽  
ZONGYUAN MA ◽  
LIJUN SU
Keyword(s):  
Bearing Capacity ◽  
Failure Criteria ◽  
Soil Mass ◽  
Ultimate Bearing Capacity ◽  
Intermediate Principal Stress ◽  
Soil Slope ◽  
Strength Theory ◽  
Unified Strength Theory ◽  
Potential Strength ◽  
Coulomb Criterion

At present, the failure criteria used in calculating the ultimate bearing capacity of soil slope are the Tresca and Mohr-Coulomb criteria. But the results are conservative and the potential strength of soil mass cannot be utilized sufficiently because these two criteria do not take into account the effect of the intermediate principal stress. In this paper the unified strength theory was used to analyze the ultimate bearing capacity of soil slope. The formula for calculating the ultimate bearing capacity of soil slope using the unified strength theory was established. At the end, a case history was analyzed and it indicated that the result of the unified strength theory is larger than that of the Mohr-Coulomb criterion. This indicates that calculation of ultimate bearing capacity of soil slope with the unified strength theory can sufficiently exploit the strength of material. Therefore, the calculation of ultimate bearing capacity of the soil slope based on the unified strength theory will be of great significance in future applications.

scholarly journals Elastoplastic Analysis of Two-Layered Circular Lining Based on the Unified Strength Theory

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
Ning Zhang ◽  
Haomin Guo ◽  
Tahir Khan ◽  
Erhao Zhu ◽  
Shaoshuai Shi ◽  
...  
Keyword(s):  
Bearing Capacity ◽  
Axial Load ◽  
Radial Direction ◽  
Ultimate Bearing Capacity ◽  
Elastoplastic Analysis ◽  
Stress Distributions ◽  
Strength Theory ◽  
Unified Strength Theory ◽  
Young’S Moduli ◽  
Tresca Criterion

Based on the Unified Strength Theory (UST), elastoplastic analysis of the two-layered circular lining is carried out. The stresses, displacements, and the elastic and plastic zones in both layers are discussed under different values of Young’s moduli of the inner and outer layers. The results reveal that, compared to the single-layered lining, the tangential stress distributions in the two-layered linings are more reasonable along the radial direction, which is beneficial to enhance the overall elastic and plastic ultimate bearing capacities. When considering the intermediate stress (i.e., the axial load), the elastic ultimate bearing capacity will be higher. However, the plastic ultimate bearing capacity remains unchanged. Moreover, a comparison between the Unified Strength Theory and Tresca Criterion is analyzed as well.

Ultimate Bearing Capacity Based on Unified Strength Theory

2013 ◽  
Vol 368-370 ◽  
pp. 1838-1842
Author(s):  
Xuan Zhou ◽  
Guo Jian Shao ◽  
Feng Hu
Keyword(s):  
Bearing Capacity ◽  
Ultimate Bearing Capacity ◽  
Balance Theory ◽  
Strength Theory ◽  
Unified Strength Theory ◽  
Analytical Formulas ◽  
Practical Experiences

In the ultimate bearing capacity formulas, the factor Nγ has not been given a definite expression, so the calculation diagrams are not serious and the hypothesis can’t match the reality. Most of the ultimate bearing capacity factors are received from the results of Prandtl theory, but the theoretic models they used are not the same. And most of the ultimate bearing capacity theories are based on Mohr-Coulomb theory, the effects of intermediate principle stress are ignored. To solve these problems, according to ultimate balance theory and unified strength theory, the analytical formulas of ultimate bearing capacity and Nγ are received when foundation is completely smooth. The results show that the ultimate bearing capacity will increase when considering the effects of intermediate principle stress and the formulas from practical experiences can make the ultimate bearing capacity unsteady.

Study on the Ultimate Bearing Capacity of Concrete Filled Steel Square Tubular Short Column with PBL

2014 ◽  
Vol 941-944 ◽  
pp. 770-775
Author(s):  
Yun Ling ◽  
Wen Yu Feng ◽  
Jun Hai Zhao ◽  
Yan Li
Keyword(s):  
Bearing Capacity ◽  
Positive Impact ◽  
Ultimate Bearing Capacity ◽  
Test Results ◽  
Strength Theory ◽  
Unified Strength Theory ◽  
Compression Load ◽  
Short Column ◽  
Shear Connectors ◽  
Core Concrete

Aiming at the specific concrete filled square steel tubular short column stiffened with PBL under axial compression load, considering about the useful effect of the PBL shear connectors, the mechanical behavior of PBL stiffening ribs was analyzed. Through the analysis of the effective restriction-area and ineffective restriction-area of core-concrete, introduce into the effective constraint coefficient of concrete. The ultimate bearing capacity was deduced based on the unified strength theory, with some influencing factors analyzed as well. Compared with the test results in relevant documents, they coincided well with each other. The result shows that the formula which is deducted from the unified strength theory has good applicability and the solution will show its positive impact in the related fields.

Unified Solution of the Ultimate Bearing Capacity for Stiffened and Thin-Walled Square CFST Short Columns under Axial Compression

2013 ◽  
Vol 690-693 ◽  
pp. 797-804
Author(s):  
Jian Feng Xu ◽  
Peng Wu ◽  
Jun Hai Zhao ◽  
Yan Li ◽  
Wen Biao Liang
Keyword(s):  
Bearing Capacity ◽  
Ultimate Bearing Capacity ◽  
Strength Theory ◽  
Unified Strength Theory ◽  
Strength Differential ◽  
Short Columns ◽  
Reduction Coefficient ◽  
Tension And Compression ◽  
Thin Walled ◽  
Cfst Columns

Directed against the stiffened and thin-walled square concrete-filled steel tubular (CFST) short columns, the paper simplifies the square CFST columns into the circle ones by introducing the strength reduction coefficient of concrete and the equivalent constraint reduction coefficient. On the basis of the unified strength theory, the united solution of the ultimate bearing capacity for square CFST columns is deduced after considering the influence of strength-differential in tension and compression and intermediate principal stress. Some influencing factors are also analyzed in the paper. Through comparing the results of proposed formula with that of experiments of relevant literatures，the rationality of proposed formula is proved. The solution may provide theoretical references for the study of the ultimate bearing capacity for stiffened and thin-walled square CFST short columns.

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