scholarly journals Numerical Modelling of Cyclic Pull-Out Behaviors of Embedded Plate Anchors in Saturated Soft Clay

2014 ◽  
Author(s):  
Cun Hu ◽  
Fu-ping Gao
Keyword(s):  
Cyclic Loading ◽  
Soft Clay ◽  
Numerical Approach ◽  
Offshore Structures ◽  
Mean Value ◽  
Surface Plasticity ◽  
Pull Out ◽  
Plate Anchor ◽  
Cyclic Degradation ◽  
Saturated Soft Clay

As a foundation for deep-water floating offshore structures, the embedded plate anchor should withstand the complicated marine conditions involving the cyclic loads. The pull-out behaviors of the embedded plate anchor under cyclic loading must be considered whilst designing. This paper presents a numerical approach for assessing the cyclic pull-out behaviors of the embedded plate anchor based on a recently proposed anisotropic bounding surface plasticity model, which can capture the non-failure stable and degradation characteristics of saturated soft clay under cyclic loading with different stress-levels. The pull-out behaviors of the embedded plate anchor under both monotonic and cyclic loading are simulated and investigated. Effects of the mean value, the amplitude of the cyclic loading on the cyclic pull-out behaviors are analyzed. The results demonstrate that under different cyclic loading levels three typical types of the cyclic pull-out behaviors are obtained, i.e., the cyclic stable, the cyclic hypo-stable and the cyclic degradation.

Undrained deformation behavior of saturated soft clay under long-term cyclic loading

2013 ◽  
Vol 50 ◽  
pp. 28-37 ◽  
Author(s):  
Lin Guo ◽  
Jun Wang ◽  
Yuanqiang Cai ◽  
Hanlong Liu ◽  
Yufeng Gao ◽  
...  
Keyword(s):  
Cyclic Loading ◽  
Deformation Behavior ◽  
Soft Clay ◽  
Saturated Soft Clay

scholarly journals Relationship between monotonic and cyclic behavior of saturated soft clay in undrained triaxial compression tests

2021 ◽  
Author(s):  
Tingyu Wu ◽  
Jie Han ◽  
Yuanqiang Cai ◽  
Lin Guo ◽  
Jun Wang
Keyword(s):  
Cyclic Loading ◽  
Triaxial Compression ◽  
Soft Clay ◽  
Cyclic Behavior ◽  
Triaxial Tests ◽  
Engineering Practice ◽  
Compression Tests ◽  
Cyclic Tests ◽  
Saturated Soft Clay ◽  
Triaxial Compression Tests

Cyclic loading-induced deformation of soil is a common problem in the engineering practice. In the current practice, however, monotonic triaxial tests are more commonly used in the practice, due to the availability of apparatus and ease of operation. Thus, it will be very useful and practical if the monotonic triaxial tests can be used to evaluate the behavior of soil under cyclic loading. This study aims to find an explicit relationship between monotonic and cyclic behavior of saturated soft clay. Six monotonic and nine cyclic triaxial compression tests were conducted on undisturbed saturated soft clay under an undrained condition. The test results showed that the monotonic and cyclic tests shared the same stress-strain surface in a three-dimensional space p^'-q-ε_a. It is also found possible to evaluate the effective stress states of cyclic tests at two specific numbers of cycles, using corresponding monotonic tests. Based on these two findings, a simple procedure was then proposed to predict the peak axial strain for the saturated soft clay under different cyclic loadings based on the monotonic tests and only one cyclic test, which was further verified against more test data from the previous literature.

Study on Characteristic of Saturated Soft Clay under one-Way Cyclic Loading

2010 ◽  
Vol 168-170 ◽  
pp. 690-695
Author(s):  
Tian Jun Liu ◽  
Guan Feng An ◽  
Hong Bin Zhang
Keyword(s):  
Cyclic Loading ◽  
Axial Stress ◽  
Soft Clay ◽  
Liquid Limit ◽  
Triaxial Tests ◽  
Confining Stress ◽  
Traffic Loading ◽  
Critical Dynamic ◽  
The Pearl River ◽  
Saturated Soft Clay

Simulating traffic loading, the high liquid limit clay specimens and the low liquid limit clay specimens of the Pearl River delta are engaged in cyclic triaxial tests under one-way cyclic loading respectively. The influence of axial stress, confining stress and plasticity index are taken into account. A critical dynamic stress ratio of saturated soft clay under one-way cyclic loading and the variations of axis strain and pore pressure with number of cycles were obtained. The conclusions are helpful to compute the settlement of saturated soft foundation under traffic loading after work.

Cyclic pull-out test of single PVA fibers in cementitious matrix

2011 ◽  
Vol 45 (26) ◽  
pp. 2765-2772 ◽  
Author(s):  
Seong-Cheol Lee ◽  
Kyung-Joon Shin ◽  
Byung-Hwan Oh
Keyword(s):  
Cyclic Loading ◽  
Fatigue Behavior ◽  
Tensile Tests ◽  
Mechanical Tests ◽  
Fiber Reinforced Concrete ◽  
Test Method ◽  
Single Fiber ◽  
Pull Out ◽  
The Individual ◽  
Cyclic Degradation

Recently, many studies have been conducted to examine the behavior of fiber-reinforced concrete (FRC) subjected to cyclic loading. However, cyclic and fatigue behavior is so complex that the mechanism of degradation cannot be cleared just by simple mechanical tests such as flexural and tensile tests of FRC specimens that measure typical overall behavior of the material. Besides these kinds of investigations, the individual behavior of the constituents and the interaction between them need to be investigated to reveal the cyclic degradation and fatigue mechanism of FRC detail. So far, only a few experiments have been devoted to the cyclic degradation of fibers in FRC. Therefore, cyclic pull-out behavior of single fiber is investigated in this study. A main objective of this article is to propose a test method for a cyclic pull-out test of a single fiber and to investigate the degradation behavior of single PVA fibers under cyclic loading conditions. Single PVA fibers were tested using quasi-static and cyclic loading methods, and the test results revealed the bridging load of PVA fibers decreases continuously and it become less than half the initial load during the cyclic loading process.

Study on the Variation Regularity of Shear Strength of Saturated Soft Clay under Cyclic Loading

2011 ◽  
Vol 250-253 ◽  
pp. 2388-2391 ◽  
Author(s):  
Xiao Ping Wang ◽  
Jian Qi Wu
Keyword(s):  
Shear Strength ◽  
Cyclic Loading ◽  
Bearing Capacity ◽  
Triaxial Test ◽  
Soft Clay ◽  
Undrained Shear Strength ◽  
Saturated Soft Clay ◽  
Undrained Shear

The stiffness and shear strength of soft clay attenuate under long-term cyclic loading, resulting in reduced foundation bearing capacity of road. The variation regularity of undrained shear strength of saturated soft clay which is normally consolidated or over consolidated under cyclic loading was studied with two-way vibration triaxial test, and some useful results are obtained.

Deformation Behaviors and Dynamic Backbone Curve Model of Saturated Soft Clay under Bidirectional Cyclic Loading

2020 ◽  
Vol 20 (4) ◽  
pp. 04020016
Author(s):  
Juehao Huang ◽  
Jian Chen ◽  
Yuan Lu ◽  
Shun Yi ◽  
Hongzhan Cheng ◽  
...  
Keyword(s):  
Cyclic Loading ◽  
Soft Clay ◽  
Backbone Curve ◽  
Curve Model ◽  
Deformation Behaviors ◽  
Saturated Soft Clay

Cyclic Loading of Piles Using the P-Y Method

2019 ◽  
Vol 13 (2) ◽  
Author(s):  
Matt Bristow
Keyword(s):  
Cyclic Loading ◽  
Soil Depth ◽  
Large Diameter ◽  
Reference Conditions ◽  
Numerical Procedure ◽  
New Method ◽  
Shear Stresses ◽  
Applied Loading ◽  
Cyclic Degradation ◽  
Laterally Loaded

A new analytical method is presented to determine the effects of cyclic loading on laterally loaded piles. The method uses a new numerical procedure to quantify the effects of the cyclic loading at each soil depth and convert that to a set of cyclic p-y modifiers. The reduced foundation stiffness associated with the cyclic loading can be determined, including the residual static capacity and an estimate of the accumulated displacement. The new method introduces the concept of cyclic degradation damage, which is defined as sum of the cyclic degradation that is occurring at each soil depth. Cyclic degradation calculations are based on the shear stresses in the soil. Consequently, anything that causes the shear stresses to change (e.g. pile length, pile diameter, applied loading, etc.) will automatically be included in the calculation of cyclic p-y modifiers. The method has been validated by comparing the cyclic p-y curves produced using the new method with established cyclic p-y curves derived from fielding testing. The new method has also been used to investigate what happens to the cyclic p-y modifiers as one moves away from the reference conditions used to determine the established cyclic p-y curves in API RP2A (2000). The new method shows that every application (e.g. combination of cyclic loading, pile properties, and soil characteristics) has its own unique set of cyclic p-y curves, though most p-y curves fit within an upper and lower bound range. Examples are provided for large diameter monopiles.

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