Author: Viet Hung Le
Publisher:
ISBN:
Category : Shear (Mechanics)
Languages : en
Pages : 12
Book Description
This article presents a new procedure for cyclic simple shear tests with a change in the loading direction. For the experimental investigation of sand under drained condition, a conventional simple shear test device (unidirectional simple shear) was used. After modification of the specimen cell, the cell can rotate during the test, enabling the load direction to be changed. The construction of this modified version and its test procedure are explained in detail. This modification and test procedure can also be used for different simple shear devices of the same type. Furthermore, a test series involving Berlin sand was conducted with the direction of cyclic loading being changed once during each test. The test results indicate that a change in the cyclic direction has a significant influence on the accumulated deformation of sand.
A New Cyclic Simple Shear Test Procedure with Multidirectional Loading
Author: Viet Hung Le
Publisher:
ISBN:
Category : Shear (Mechanics)
Languages : en
Pages : 12
Book Description
This article presents a new procedure for cyclic simple shear tests with a change in the loading direction. For the experimental investigation of sand under drained condition, a conventional simple shear test device (unidirectional simple shear) was used. After modification of the specimen cell, the cell can rotate during the test, enabling the load direction to be changed. The construction of this modified version and its test procedure are explained in detail. This modification and test procedure can also be used for different simple shear devices of the same type. Furthermore, a test series involving Berlin sand was conducted with the direction of cyclic loading being changed once during each test. The test results indicate that a change in the cyclic direction has a significant influence on the accumulated deformation of sand.
Publisher:
ISBN:
Category : Shear (Mechanics)
Languages : en
Pages : 12
Book Description
This article presents a new procedure for cyclic simple shear tests with a change in the loading direction. For the experimental investigation of sand under drained condition, a conventional simple shear test device (unidirectional simple shear) was used. After modification of the specimen cell, the cell can rotate during the test, enabling the load direction to be changed. The construction of this modified version and its test procedure are explained in detail. This modification and test procedure can also be used for different simple shear devices of the same type. Furthermore, a test series involving Berlin sand was conducted with the direction of cyclic loading being changed once during each test. The test results indicate that a change in the cyclic direction has a significant influence on the accumulated deformation of sand.
Development of a Multidirectional Simple Shear Testing Device
Author: C. J. Rutherford
Publisher:
ISBN:
Category : Deformations (Mechanics)
Languages : en
Pages : 9
Book Description
A new simple shear testing device capable of applying multidirectional loading to soil specimens has been developed. The Texas A&M University multidirectional simple shear (TAMU-MDSS) device provides the ability to apply a large range of shear stresses and complex loading paths, such as figure-eight and circular patterns, to a cylindrical soil specimen confined by a wire-reinforced membrane. The load and torque experienced by the sample are directly measured by a multi-axis load cell installed above the specimen. Backpressure saturation of the specimen is made possible by the device's ability to apply pressure in the chamber and backpressure to the water lines. Excess pore pressure is measured by a pressure transducer during the shearing phase of the testing. This paper describes the development of the TAMU-MDSS system and the capabilities of the device and presents test results on saturated clay soil specimens subjected to monotonic, unidirectional cyclic, and multidirectional loading.
Publisher:
ISBN:
Category : Deformations (Mechanics)
Languages : en
Pages : 9
Book Description
A new simple shear testing device capable of applying multidirectional loading to soil specimens has been developed. The Texas A&M University multidirectional simple shear (TAMU-MDSS) device provides the ability to apply a large range of shear stresses and complex loading paths, such as figure-eight and circular patterns, to a cylindrical soil specimen confined by a wire-reinforced membrane. The load and torque experienced by the sample are directly measured by a multi-axis load cell installed above the specimen. Backpressure saturation of the specimen is made possible by the device's ability to apply pressure in the chamber and backpressure to the water lines. Excess pore pressure is measured by a pressure transducer during the shearing phase of the testing. This paper describes the development of the TAMU-MDSS system and the capabilities of the device and presents test results on saturated clay soil specimens subjected to monotonic, unidirectional cyclic, and multidirectional loading.
Undrained Response of Monterey 0/30 Sand Under Multidirectional Cyclic Simple Shear Loading Conditions
A Cyclic Undrained Simple Shear Testing Method for Soils
Author: F. Tatsuoka
Publisher:
ISBN:
Category : Cyclic undrained tests
Languages : en
Pages : 12
Book Description
An undrained simple shear testing method for soils using a torsional shear apparatus is described, in which a hollow cylindrical specimen is sheared under plane strain conditions without deforming and rotating all horizontal planes. In this testing method, the simple shear deformation mode is achieved only by several mechanical means without using an automated pressure control system. Typical results of cyclic undrained simple shear tests using uniform cyclic shear stresses on one-dimensionally consolidated saturated sand are presented. A similar undrained testing method with the same inner and outer lateral confining pressures, in which the simple shear condition is satisfied only in an approximated way, is also described. The test results show that the deviation of the stress-strain behavior in the approximate testing method from that under the exact simple shear condition increases as the shear strain increases. However, it was also found that for the purpose of evaluating cyclic undrained simple shear strength values defined by the amplitude of cyclic shear strain, the use of this approximate testing method is justified.
Publisher:
ISBN:
Category : Cyclic undrained tests
Languages : en
Pages : 12
Book Description
An undrained simple shear testing method for soils using a torsional shear apparatus is described, in which a hollow cylindrical specimen is sheared under plane strain conditions without deforming and rotating all horizontal planes. In this testing method, the simple shear deformation mode is achieved only by several mechanical means without using an automated pressure control system. Typical results of cyclic undrained simple shear tests using uniform cyclic shear stresses on one-dimensionally consolidated saturated sand are presented. A similar undrained testing method with the same inner and outer lateral confining pressures, in which the simple shear condition is satisfied only in an approximated way, is also described. The test results show that the deviation of the stress-strain behavior in the approximate testing method from that under the exact simple shear condition increases as the shear strain increases. However, it was also found that for the purpose of evaluating cyclic undrained simple shear strength values defined by the amplitude of cyclic shear strain, the use of this approximate testing method is justified.
Liquefaction Triggering and Post-liquefaction Deformation of Monterey 0/30 Sand Under UNI-directional Cyclic Simple Shear Loading
Testing Using a Large-Scale Cyclic Simple Shear Device
Author: MI. Amer
Publisher:
ISBN:
Category : Cyclic tests
Languages : en
Pages : 7
Book Description
Cyclic simple shear testing is considered to be one of the most appropriate ways of reproducing in the laboratory the stresses that would be experienced by an element of soil in level ground subjected to earthquake loading. In the last few years cyclic simple shear testing has been analyzed experimentally and theoretically, and the advantages and limitations of the test presented. The main drawback concerns the lack of complementary shear stresses on the specimen vertical boundary and thereby a selection of the proper specimen size, that is, proper diameter versus height ratio must be carefully considered. The nonuniformity of the strain and stresses in the specimen most likely increases as the specimen diameter versus height ratio decreases. To investigate the specimen size effect on the primary dynamic (cyclic) soil properties, namely, the shear modulus and damping, a large-scale simple shear apparatus was constructed. In it, specimens having diameters from 7.6 to 30.5 cm (3 to 12 in.) and heights from 0.64 to 10.2 cm (1⁄4 to 4 in.) could be tested. Thus a wide range of diameter to height ratios could be obtained. The new testing device, its control system, and the method of preparation and installation of the soil specimens for such a large-scale device are presented and discussed. In addition, a cyclic testing program was conducted on sand and some examples of the data obtained are presented as well.
Publisher:
ISBN:
Category : Cyclic tests
Languages : en
Pages : 7
Book Description
Cyclic simple shear testing is considered to be one of the most appropriate ways of reproducing in the laboratory the stresses that would be experienced by an element of soil in level ground subjected to earthquake loading. In the last few years cyclic simple shear testing has been analyzed experimentally and theoretically, and the advantages and limitations of the test presented. The main drawback concerns the lack of complementary shear stresses on the specimen vertical boundary and thereby a selection of the proper specimen size, that is, proper diameter versus height ratio must be carefully considered. The nonuniformity of the strain and stresses in the specimen most likely increases as the specimen diameter versus height ratio decreases. To investigate the specimen size effect on the primary dynamic (cyclic) soil properties, namely, the shear modulus and damping, a large-scale simple shear apparatus was constructed. In it, specimens having diameters from 7.6 to 30.5 cm (3 to 12 in.) and heights from 0.64 to 10.2 cm (1⁄4 to 4 in.) could be tested. Thus a wide range of diameter to height ratios could be obtained. The new testing device, its control system, and the method of preparation and installation of the soil specimens for such a large-scale device are presented and discussed. In addition, a cyclic testing program was conducted on sand and some examples of the data obtained are presented as well.
Standard Test Method for Consolidated Undrained Cyclic Direct Simple Shear Test Under Constant Volume with Load Control Or Displacement Control
Journal of Geotechnical Engineering
Proceedings of the 4th International Conference on Performance Based Design in Earthquake Geotechnical Engineering (Beijing 2022)
Author: Lanmin Wang
Publisher: Springer Nature
ISBN: 3031118987
Category : Science
Languages : en
Pages : 2417
Book Description
The 4th International Conference on Performance-based Design in Earthquake Geotechnical Engineering (PBD-IV) is held in Beijing, China. The PBD-IV Conference is organized under the auspices of the International Society of Soil Mechanics and Geotechnical Engineering - Technical Committee TC203 on Earthquake Geotechnical Engineering and Associated Problems (ISSMGE-TC203). The PBD-I, PBD-II, and PBD-III events in Japan (2009), Italy (2012), and Canada (2017) respectively, were highly successful events for the international earthquake geotechnical engineering community. The PBD events have been excellent companions to the International Conference on Earthquake Geotechnical Engineering (ICEGE) series that TC203 has held in Japan (1995), Portugal (1999), USA (2004), Greece (2007), Chile (2011), New Zealand (2015), and Italy (2019). The goal of PBD-IV is to provide an open forum for delegates to interact with their international colleagues and advance performance-based design research and practices for earthquake geotechnical engineering.
Publisher: Springer Nature
ISBN: 3031118987
Category : Science
Languages : en
Pages : 2417
Book Description
The 4th International Conference on Performance-based Design in Earthquake Geotechnical Engineering (PBD-IV) is held in Beijing, China. The PBD-IV Conference is organized under the auspices of the International Society of Soil Mechanics and Geotechnical Engineering - Technical Committee TC203 on Earthquake Geotechnical Engineering and Associated Problems (ISSMGE-TC203). The PBD-I, PBD-II, and PBD-III events in Japan (2009), Italy (2012), and Canada (2017) respectively, were highly successful events for the international earthquake geotechnical engineering community. The PBD events have been excellent companions to the International Conference on Earthquake Geotechnical Engineering (ICEGE) series that TC203 has held in Japan (1995), Portugal (1999), USA (2004), Greece (2007), Chile (2011), New Zealand (2015), and Italy (2019). The goal of PBD-IV is to provide an open forum for delegates to interact with their international colleagues and advance performance-based design research and practices for earthquake geotechnical engineering.