Validation of a 3-Dimensional Finite Element Analysis Model of Deep Water Steel Tube Umbilical in Combined Tension and Cyclic Bending

2009 ◽  
Author(s):  
Vincent Le Corre ◽  
Ian Probyn
Keyword(s):  
Axial Strain ◽  
Steel Tube ◽  
Analytical Models ◽  
Partial Slip ◽  
Analysis Model ◽  
Steel Tubes ◽  
Element Analysis ◽  
Cyclic Bending ◽  
Friction Moment ◽  
Bending Under Tension

This paper focuses upon validation of the 3-D FEA model for cyclic bending under tension load case. An important aspect of accurately modelling the behaviour is the complex stick, partial slip and full slip behaviour of the internal components. Particular attention is paid to the resisting moment resulting from internal friction, known as the friction moment. The effect of increasing tension on the friction moment is studied. The kinematics of sliding are compared to analytical models developed for helically wound structures, such as flexible pipes, and show a very good correlation that confirms the accuracy of the model. Also, the mean axial strain of the steel tubes due to the friction induced by this sliding is highlighted. The hysteretic curves of the axial strain in steel tubes subjected to cyclic bending under tension are derived and validated against full scale experimental data.

Study on Mechanism of L-Shaped Concrete-Filled Steel Tubular Columns Subjected to Axial Compression

2012 ◽  
Vol 476-478 ◽  
pp. 2463-2468 ◽  
Author(s):  
Ji Cheng Zhang ◽  
Jun Yang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Axial Compression ◽  
Constitutive Relations ◽  
Steel Tube ◽  
Constitutive Relationship ◽  
Steel Tubes ◽  
Element Analysis ◽  
Relationship Of ◽  
Deformation Relationship

In this paper, a constitutive relationship of the concrete core restrained by L-Shaped steel tube is put forward based on referring to the constitutive relations of core concrete in concrete-filled square steel tube columns, which takes the restraint of steel tube to concrete as an equivalent confinable effect coefficient . Load-deformation relationship of L-Shaped concrete-filled steel tubular column subjected to axial compression is analyzed by finite element analysis (using ABAQUS software). The predicted load versus deformation relationship cures are in good agreement with those of tests based on the finite element analysis, loads carried by steel tubes and concrete respectively during the loading process, as well as interactions between them are analyzed. Finally, influences of length-width ratio and width-thickness ratio on the interaction between steel tubes and concrete are investigated.

Assess the Seismic Wave Influence on Buried Pipelines With ASCE Soil-Spring Model

2014 ◽  
Author(s):  
Fan Zhang ◽  
Yong-Yi Wang
Keyword(s):  
Soil Properties ◽  
Seismic Wave ◽  
Seismic Waves ◽  
Oil And Gas ◽  
Field Conditions ◽  
Analytical Models ◽  
Spring Model ◽  
Analysis Model ◽  
Buried Pipelines ◽  
Element Analysis

The propagation of seismic waves introduces strains in buried pipelines. Considerable amount of work was performed in 1970’s and early 1980’s in this subject area. A good representative of such work is the model developed by Shinozuka and Koike in 1979. The analytical models developed during this period are still the major tools in assessing the influence of seismic waves on buried pipelines. The foundations of these models are the assumptions and some simplified soil and pipe interaction models available at the time. In 1984 a spring model representing the interaction between soil and buried pipes was introduced by American Society of Civil Engineers (ASCE) in Guidelines for the Seismic Design of Oil and Gas Pipeline Systems. An improved version of the ASCE model was later published in Guidelines for the Design of Buried Steel Pipe by American Lifelines Alliance in 2001. Since then, the spring model has become one of the most widely used models by various industries and has been incorporated into commercial software, such as AutoPIPE®. Most of the soil properties in fields are represented by the parameters of the ASCE soil-spring model. However, it is inconvenient to assess the influence of seismic waves on pipelines with soil properties described by parameters of the ASCE model. There are differences between the ASCE soil-spring model and the soil-pipe interactions in the seismic wave analysis model. In this paper the foundation of Shinozuka and Koike model is first reviewed. The model is then revised to accommodate the ASCE soil-spring model. Some unnecessary assumptions in the Shinozuka and Koike model are removed to make the model more generally applicable to various field conditions. Finally, the revised model is verified by finite element analysis under several typical pipeline field conditions, including straight segments and segments with bends and tees.

scholarly journals Compressive behavior of light–gauge steel tubes filled with concrete containing recycled aggregates

2021 ◽  
Author(s):  
Alaa Sulaiman ◽  
Yasser Hunaiti ◽  
Mu’tasim Abdel-Jaber ◽  
Ma’en Abdel-Jaber
Keyword(s):  
Carrying Capacity ◽  
Steel Tube ◽  
Recycled Concrete ◽  
Experimental Results ◽  
Recycled Aggregates ◽  
Steel Tubes ◽  
Recycled Asphalt ◽  
Element Analysis ◽  
Composite Columns ◽  
Axial Capacity

Abstract The axial capacity of light–gauge steel tube columns filled with concrete including recycled asphalt pavement (RAP) aggregates and recycled concrete aggregates (RCA) was investigated. A total of 51 specimens, including 6 bare steel tubes, 30 composite columns and 15 concrete-only columns were tested under uniaxial load. Fifteen concrete mixes were considered by replacing the weight of natural coarse aggregates (NA) with RCA and RAP at replacement levels of 0, 20, 40, 60, 80, and 100%. In addition, RAP and RCA were combined in the same mixes with replacement levels of (1) 20% RAP and 80% RCA; (2) 40% RAP and 60% RCA; (3) 60% RAP and 40% RCA; and (4) 80% RAP and 20% RCA. Experimental results were analyzed by reporting the ultimate capacities and the patterns of failure. Moreover, the predictions of EUROCODE 4 (EC4) and American Institute of Steel Construction (AISC) codes were checked. ABAQUS software was used to perform a finite element analysis (FEA) of the tested composite specimens. The results showed that using recycled aggregates decreased the carrying capacity of columns. Carrying capacity of light–gauge steel tubes filled with concrete including different combinations of RCA, NA and RAP aggregates can be conservatively predicted by the AISC and EC4 recommendations. Results of FEA showed a good agreement with the experimental results.

Temperature Field Analysis of Circular Concrete Filled Steel Tube Reinforced Concrete Column under Fire

2014 ◽  
Vol 1015 ◽  
pp. 219-222 ◽  
Author(s):  
Jian Sheng Dong ◽  
Qing Xin Ren ◽  
Lian Guang Jia
Keyword(s):  
Reinforced Concrete ◽  
Three Dimensional ◽  
Steel Tube ◽  
Field Analysis ◽  
Concrete Column ◽  
Analysis Model ◽  
Structural Behaviour ◽  
Reinforced Concrete Column ◽  
Element Analysis ◽  
Concrete Filled Steel Tube

A three-dimensional finite element analysis model was developed using ABAQUS to simulate the temperature distributions of circular concrete filled steel tube reinforced concrete column in this paper. The influence of main parameters on the temperature distribution, such as heating time, section diameter, and steel tube diameter, was analyzed. This provides valuable information about structural fire resistance and structural behaviour of concrete filled steel tube reinforced concrete column structure under fire.

Experimental Verification of a Full-Size Buckling Restrained Brace

2012 ◽  
Vol 166-169 ◽  
pp. 3147-3150 ◽  
Author(s):  
Lin Liu ◽  
Chao Liu ◽  
Xue Jun Yin
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Low Cycle Fatigue ◽  
Axial Strain ◽  
Steel Tube ◽  
Test Sequence ◽  
Element Analysis ◽  
Full Size ◽  
Buckling Restrained Brace ◽  
Steel Core

This paper presents experimental and finite element analysis result of a full-size Buckling Restrained Brace (BRB). The brace consists of a steel core encased in a steel tube filled with concrete. The low-cycle fatigue check was incorporated into the cyclic test program. Test results show that the BRB product can develop stable hysteretic responses up to core axial strain of 1.3% and the maximum compressive loads is 1.23 times the actual yield load. The specimen performs well through the whole test sequence. Nonlinear finite element analysis was conducted for a comparison analysis, and contact interactions between the steel core and concrete infill were modeled. The finite element model can reasonably predict the compression behavior and post-yield strength of the specimen.

Effects of Notch Depth and Direction on Stability of Local Sharp-Notched Circular Tubes Subjected to Cyclic Bending

2018 ◽  
Vol 18 (07) ◽  
pp. 1850099 ◽  
Author(s):  
Kuo-Long Lee ◽  
Kao-Hua Chang ◽  
Wen-Fung Pan
Keyword(s):  
Analytical Data ◽  
Cyclic Hardening ◽  
Notch Depth ◽  
Steel Tubes ◽  
Element Analysis ◽  
Cyclic Bending ◽  
Tube Cross Section ◽  
Number Of Cycles ◽  
The Moment ◽  
The Relationship

Cyclic bending of tubes leads to progressive ovalization of the tube cross-section, and persistent cycling causes catastrophic buckling of the tube. This paper presents the response and stability of SUS304 stainless steel tubes with local sharp-notched depths of 0.2, 0.4, 0.6, 0.8, and 1.0[Formula: see text]mm and notch directions of 0[Formula: see text], 30[Formula: see text], 60[Formula: see text], and 90[Formula: see text] under cyclic bending. The experimental results reveal that the moment–curvature relationship first exhibits cyclic hardening and then a steady loop after a few cycles. Because the notches are small and localized, notch depth and direction show minimal influence on the moment–curvature relationship. In contrast, the ovalization–curvature relationship demonstrates an increasing and ratcheting pattern along with the bending cycle, whereas notch depth and direction show a strong influence on this relationship. Finite-element analysis via ANSYS is used to simulate the moment–curvature and ovalization–curvature relationships, and an empirical model is proposed to simulate the relationship between the controlled curvature and number of cycles required to ignite buckling. The experimental and analytical data agree well with each other.

Structural behaviour of inner set bolted joints in steel tubes under tension

2020 ◽  
Vol 23 (8) ◽  
pp. 1601-1613
Author(s):  
Li Xing ◽  
Qingshuai Cao ◽  
Ru Zhang
Keyword(s):  
Finite Element ◽  
Yield Criterion ◽  
Steel Tube ◽  
Analysis Model ◽  
Structural Behaviour ◽  
Element Analysis ◽  
Response Characteristics ◽  
The Cross ◽  
Modelling Assumptions ◽  
Set Up

In this article, the structural behaviour of a new continuous joint of steel tube under tension is systematically studied. Structural analyses of six typical joints under tension are carried out. The experimental set-up and details of the specimens are introduced, followed by descriptions of the results and experimental observations. Based on the experimental results, the main behavioural patterns are discussed and the salient response characteristics related to stress concentration and capacity are examined. An ideal elastoplastic stress–strain relationship, Mises yield criterion and geometric nonlinear finite element analysis model are established, and a detailed description of the modelling assumptions is presented. A large number of finite element parameters are further analysed. The experimental and numerical findings presented in this article offer direct information on the influence of key bearing capacity properties, such as the plugged length of the cross-gusset, the area of the cross-gusset and the area of the cushion-plate, on the main response characteristics. The results also provide essential data for future analytical and design-oriented studies.

Finite Element Analysis of RPC-Filled Steel Tube Stub Columns

2011 ◽  
Vol 189-193 ◽  
pp. 1906-1909 ◽  
Author(s):  
Hua Luo ◽  
Zhi Gang Yan ◽  
Ming Zhe An
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
High Strength ◽  
Element Model ◽  
Steel Tube ◽  
Nonlinear Material ◽  
Steel Tubes ◽  
Element Analysis ◽  
Reactive Powder ◽  
Stub Columns

Reactive Powder Concrete (RPC) is a kind of cement-based composite which has ultra-high strength, high ductility and durability. RPC has great fragility, bad ductility and bursting fragility destruction subjected to high or complicated stress. The fragility performance of RPC will be improved when RPC is cast in steel tubes. The behavior of axially loaded RPC-filled steel tube circular stub columns is presented in this discussion according to the experiment and finite element analysis. An accurate finite element model was developed to carry out the analysis. Accurate nonlinear material models for confined concrete and steel tubes were used. The results obtained from the finite element analysis were verified against experimental results.

Dynamic Fracture and Anti-Explosion Capacity Investigation of Composite Explosion Containment Vessel

2012 ◽  
Author(s):  
Yang Hu ◽  
Jinyang Zheng ◽  
Li Ma
Keyword(s):  
Dynamic Fracture ◽  
Explosive Charge ◽  
Metal Layer ◽  
Axial Strain ◽  
Good Condition ◽  
Composite Layer ◽  
Numerical Results ◽  
Analysis Model ◽  
Hoop Strain ◽  
Element Analysis

Explosion containment vessels (ECVs) have been widely used as they can contain the shock wave and products from high explosions. Recently, there has been an increased interest in composite materials using in ECVs because of their advantages of high specific strength, reduced maintenance costs, and improved corrosion resistance. In this paper, an experiment was carried out using two e-glass/epoxy composite ECVs with an aluminum alloy inner layer to investigate the dynamic fracture and anti-explosion capacity of composite ECVs. The experiment contains two stages. In the first stage, two vessels were tested using 10g and 20g explosive charge, respectively. Dynamic circumferential and axial strain was measured. The vessel under the blast of 10g explosive was in good condition while the other one was failure as a through crack appeared. In the second stage, a large explosive charge of 30g was detonated at the center of vessel and the vessel was damaged seriously. The fracture characteristic is described in detail. The experimental results show that the range of the anti-explosion capacity ζ is between 1.43% and 2.87% which is much higher than that of single layer ECVs and also higher than that mentioned in other literature. A three-dimensional finite element analysis model is established using the ALE method based on ANSYS/LS-DYNA to simulate the experiment results of experimental vessel under the explosive loading. Good agreement between experimental and numerical results can be obtained by comparing the bulging phenomenon and hoop strain around the explosion center. The numerical results also show that the delamination appears and the delamination between the inner metal layer and adjacent composite layer is especially obvious.

Axial Bearing Capacity of Steel Reinforced Concrete Short Column with Double Circular Steel Tubes

2013 ◽  
Vol 721 ◽  
pp. 720-725
Author(s):  
Juan Wang ◽  
Jun Hai Zhao ◽  
Sai Wu ◽  
Nan Li
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Relevant Literature ◽  
Steel Tube ◽  
Test Results ◽  
Steel Tubes ◽  
Element Analysis ◽  
Steel Reinforced Concrete ◽  
Short Column ◽  
Good Agreement

Based on the twin shear unified strength theory, analyzing the condition of load for the steel tube and the core-concrete under tri-axial compression, the formula of axial bearing capacity of steel reinforced concrete short column with double circular steel tubes was established and the influencing factors on it were discussed. By the comparison between the results calculated by the formula and the test results, it shows good agreement. Meanwhile, applying the formula to an engineering example, good agreement can be found in the comparison between the calculation in this paper and finite element analysis result in relevant literature. The conclusions can provide a reference for the engineering design.

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