scholarly journals Influencing Factors and Shear Capacity Formula of Single-Keyed Dry Joints in Segmental Precast Bridges under Direct Shear Loading

2020 ◽  
Vol 10 (18) ◽  
pp. 6304
Author(s):  
Wenqi Hou ◽  
Meng Peng ◽  
Bo Jin ◽  
Yong Tao ◽  
Wei Guo ◽  
...  
Keyword(s):  
Fe Simulation ◽  
Nonlinear Behavior ◽  
Simulation Method ◽  
Shear Loading ◽  
Shear Capacity ◽  
Joint Interface ◽  
Direct Shear ◽  
Element Analysis ◽  
Precast Bridges ◽  
Ultimate Shear Capacity

This article investigates the nonlinear behavior of single-keyed dry joints in segmental precast bridges under direct shear loading on the basis of nonlinear finite element analysis on lots of specimens with concrete plastic damage considered. Through detailed discussion on existing research, influence factors of the ultimate shear capacity of the keyed dry joint are analyzed, a new shear capacity formula was proposed and evaluated. The feasibility and correctness of the FE simulation method were verified by comparison with the existed experimental results. Concrete tensile strength at the key root is critical to the ultimate bearing capacity of the single-keyed dry joint under the direct shear loading. Friction on the joint interface and dimension parameters of the key do not have much effect on the ultimate shear capacity. However, reasonable key inclination (tanθ) would be suggested as 0.7~0.9. In comparison with the predicted results obtained by other existed formulas, the proposed formula is demonstrated to be in perfect consistency with both tests and the FE simulation results.

Simulation of Bridge Collapse in Virtual Scene Based on Finite Element Analysis

2011 ◽  
Vol 94-96 ◽  
pp. 2015-2018
Author(s):  
Zhen Xu ◽  
Xin Zheng Lu ◽  
Ai Zhu Ren ◽  
Xiao Lu
Keyword(s):  
Finite Element ◽  
Fe Simulation ◽  
Simulation Method ◽  
3D Animation ◽  
Element Analysis ◽  
Special Effects ◽  
Scene Simulation ◽  
Bridge Collapse ◽  
The Rich ◽  
Graphics Engine

To replicate the scene of bridge collapse realistically, accurately and completely, this paper proposes a scene simulation method of bridge collapse based Finite Element (FE) analysis. On the basis of suitable scene model of bridge, 3D animation of bridge collapse is implemented by the callback of graphics engine Open Scene Graph (OSG) and special effects of bridge collapse are also created by physics engine physX. In addition, terrain and surroundings are added into the scene simulation. The collapse animation proves to be consistent with FE simulation by comparison and the scene simulation is more realistic and complete due to the special effects and the rich scene. This study provides an important reference for analysis of collapse accidents of bridges.

scholarly journals Model studies on plate girders

1983 ◽  
Vol 18 (2) ◽  
pp. 111-117 ◽  
Author(s):  
R Narayanan ◽  
D Adorisio
Keyword(s):  
Shear Loading ◽  
Shear Capacity ◽  
Small Scale ◽  
Structural Behaviour ◽  
Plate Girders ◽  
Model Studies ◽  
Scale Models ◽  
Shear Buckling ◽  
Post Buckling ◽  
Ultimate Shear Capacity

Tests on eighteen small scale models which simulate the elastic and post-buckling behaviour of plate girders when subjected to shear loading are reported and discussed. The models were fabricated of steel and Araldite; the major aim was to assess whether small scale models can be employed to study shear buckling problems. A secondary object was to examine whether araldite could be used for predicting the structural behaviour and ultimate loads of plate girders. The strength and post-buckling characteristics exhibited by steel models were found to be similar to those observed by earlier investigators on full scale girders. The test results of steel models have been compared with the theoretical predictions obtained by using some ten design methods developed in different countries. Most of these methods are shown to give conservative but satisfactory predictions of the ultimate shear capacity of the model steel girders. Tests on Araldite models demonstrated that post-buckling behaviour can be observed visually on account of the large elastic deformations which the material is capable of, before collapse. However, they were found to be unsuitable for the prediction of the ultimate shear capacity. As Araldite is brittle, collapse would occur prematurely by sudden fracture before the full development of the tension field.

scholarly journals Non-Linear Finite Element Analysis of RC Deep Beam Using CDP Model

2020 ◽  
Author(s):  
Pramod Rai
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Research Work ◽  
Nonlinear Behavior ◽  
Shear Capacity ◽  
Experimental Results ◽  
Modeling Technique ◽  
Fe Model ◽  
Deep Beam ◽  
Element Analysis

Finite element analysis (FEA) is widely adopted these days to investigate relatively heavy structures such as reinforced concrete (RC) deep beam, which requires a higher investment of resources. This research aims to investigate a numerical modeling technique applicable to study the nonlinear behavior of RC deep beams by using FEA based on the software, ABAQUS. The nonlinear behavior of an RC deep beam adapted from an earlier research work is captured by using the uniaxial compressive and tensile stress-strain relationship and damage parameters of concrete. The response of the FE model is verified with the experimental results in terms of the load to midspan deflection curve and damage distribution. The ultimate shear capacity predicted by the FE model is 0.75% lower, and the corresponding displacement is 6.92% higher than the experimental results. The adopted modeling technique and the constitutive concrete models demonstrate the promising results indicating its possibilities for the investigation of RC structures.

scholarly journals Experimental Research and Finite Element Analysis on Mechanical Property of SFRC T-Beam

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Min Sun ◽  
Jiapeng Zhu ◽  
Ning Li ◽  
C. C. Fu
Keyword(s):  
Mechanical Property ◽  
Finite Element ◽  
Shear Capacity ◽  
Steel Fibers ◽  
Test Results ◽  
Element Analysis ◽  
Ansys Simulation ◽  
Finite Element Software ◽  
Ultimate Shear Capacity ◽  
T Beam

Research on mechanical property of SFRC was done through experiments of two SFRC T-beams and one concrete T-beam, while the influences of different volume fractions of steel fibers on integral rigidity, ultimate shear capacity, and the crack distribution characteristics were analyzed. ANSYS finite element software was used to simulate the tests and it was found that there was good conformation between the results of ANSYS simulation and tests. The test results and finite element software simulation both showed that the incorporation of steel fibers in the concrete can increase the integral rigidity and ultimate shear capacity, while partially reducing the propagation of cracks effectively. It was also proved that it is reliable to simulate SFRC T-beam by ANSYS software.

Research on the Basic Mechanical Behavior of Masonry Structure

2011 ◽  
Vol 110-116 ◽  
pp. 1539-1544
Author(s):  
Li Qun Chen
Keyword(s):  
Masonry Structure ◽  
Shear Capacity ◽  
Shear Load ◽  
Horizontal Deformation ◽  
Load Bearing Capacity ◽  
Element Analysis ◽  
Open Hole ◽  
Predicted Values ◽  
Masonry Shear Wall ◽  
Ultimate Shear Capacity

This paper analyzes the hole and open hole wall without cracking load, crack distribution and the order of appearance. We use MSC.Macr software and two-dimensional four-node element and the constitutive relation proposed masonry. Masonry shear wall is failed criterion for the force and deformation of elastic-plastic finite element analysis, wall cracking load is ultimate shear capacity. The predicted values of cracking load, ultimate shear load-bearing capacity and maximum horizontal deformation of wall agree better with testing results.

scholarly journals Optimization Study of Post-Weld Heat Treatment for 12Cr1MoV Pipe Welded Joint

Metals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 127
Author(s):  
Zichen Liu ◽  
Xiaodong Hu ◽  
Zhiwei Yang ◽  
Bin Yang ◽  
Jingkai Chen ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Residual Stress ◽  
Stress Reduction ◽  
Simulation Method ◽  
Post Weld Heat Treatment ◽  
Residual Stress Field ◽  
Element Analysis ◽  
Tempering Treatment ◽  
Temper Heat Treatment ◽  
Weld Heat

In order to clarify the role of different post-weld heat treatment processes in the manufacturing process, welding tests, post-weld heat treatment tests, and finite element analysis (FEA) are carried out for 12C1MoV steel pipes. The simulated temperature field and residual stress field agree well with the measured results, which indicates that the simulation method is available. The influence of post-weld heat treatment process parameters on residual stress reduction results is further analyzed. It is found that the post weld dehydrogenation treatment could not release residual stress obviously. However, the residual stress can be relieved by 65% with tempering treatment. The stress relief effect of “post weld dehydrogenation treatment + temper heat treatment” is same with that of “temper heat treatment”. The higher the temperature, the greater the residual stress reduction, when the peak temperature is at 650–750 °C, especially for the stress concentration area. The longer holding time has no obvious positive effect on the reduction of residual stress.

Verification of a Finite Element Analysis Procedure for Modeling the Nonlinear, Monotonic In-Plane Behavior of 4 Inch, Schedule 10, Stainless Steel, 90° Elbows

2003 ◽  
Author(s):  
James K. Wilkins
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stainless Steel ◽  
Nonlinear Behavior ◽  
Shell Element ◽  
Analysis Procedure ◽  
Hoop Strain ◽  
Element Analysis ◽  
Butt Welding ◽  
Strain Data

A project has been conducted to verify a finite element analysis procedure for studying the nonlinear behavior of 90°, stainless steel, 4 inch schedule 10, butt welding elbows. Two displacement controlled monotonic in-plane tests were conducted, one closing and one opening, and the loads, displacements, and strains at several locations were recorded. Stacked 90° tee rosette gages were used in both tests because of their ability to measure strain over a small area. ANSYS shell element 181 was used in the FEA reconciliations. The FEA models incorporated detailed geometric measurements of the specimens, including the welds, and material stress-strain data obtained from the attached straight piping. Initially, a mesh consisting of sixteen elements arrayed in 8 rings was used to analyze the elbow. The load-displacement correlation was quite good using this mesh, but the strain reconciliation was not. Analysis of the FEA results indicated that the axial and hoop strain gradients across the mid-section of the elbow were very high. In order to generate better strain correlations, the elbow mesh was refined in the mid-section of the elbow to include 48 elements per ring and an additional six rings, effectively increasing the element density by nine times. Using the refined mesh produced much better correlations with the strain data.

Finite element analysis of the residual stress of automotive wheel made of long glass fiber-reinforced thermoplastic composite

2018 ◽  
Vol 233 (10) ◽  
pp. 3592-3602 ◽  
Author(s):  
Weihao Chai ◽  
Xiandong Liu ◽  
Yinchun Shan ◽  
Xiaofei Wan ◽  
Er Jiang
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Simulation Method ◽  
Residual Stress Distribution ◽  
Thermoplastic Composite ◽  
Element Analysis ◽  
Simulation Accuracy ◽  
Glass Fiber Reinforced ◽  
Long Glass Fiber ◽  
Bending Fatigue Test

To increase the simulation accuracy, a finite element analysis method for the prediction of the residual stress distribution in the injection molded wheel made of the long glass fiber-reinforced thermoplastic composite (LGFT) is studied, and a simulation method of the wheel bending fatigue test considering the residual stress distribution is investigated in this paper. First, the in-cavity residual stress is calculated using the molding simulation method. Then the residual stress relaxation process is analyzed and the final residual stress distribution is obtained. With the residual stress as the initial stress, the structural simulation of the LGFT wheel under the bending load is performed. To evaluate the influence of the residual stress on the LGFT wheel, an additional simulation without considering the residual stress is conducted. The result shows that the interior stress considering residual stress is much higher than that without considering residual stress. To verify the simulation accuracy of these two cases, the high-stress area locations in the simulation results are compared with the damage locations in physical bending fatigue test. The result illustrates that the simulation result considering the residual stress accords with the experimental result better. Therefore, the simulation result of the residual stress is reasonable, and it is necessary to consider residual stress in the simulation of the LGFT wheel.

Nonlinear Finite Element Analysis of Diagonally Reinforced Coupling Beams with Head Bar Reinforcements

2013 ◽  
Vol 831 ◽  
pp. 137-140
Author(s):  
Kang Min Lee ◽  
Liu Yi Chen ◽  
Rui Li ◽  
Keun Yeong Oh ◽  
Young Soo Chun
Keyword(s):  
Finite Element ◽  
Construction Projects ◽  
Nonlinear Behavior ◽  
Lateral Loads ◽  
Coupling Beams ◽  
Element Analysis ◽  
Coupled Wall ◽  
Finite Element Software ◽  
Small Depth ◽  
Coupled Wall Systems

Coupling beams resist lateral loads efficiently is well known in coupled wall systems. In many cases, geometric limits result in coupling beams that are deep in relation to their clear span. Coupling beams with small depth-to-span ratio shall be reinforced with two intersecting groups of diagonally placed bars symmetrical along the mid-span. It's always hard to optimize construction projects. This paper used the finite element software (Abaqus) to analysis and simulate the nonlinear behavior of a new reinforcement called head bar and compared the results to the current standards.

scholarly journals Effect of local instability on fire response of steel beams

2017 ◽  
Vol 1 (2) ◽  
pp. 170-179 ◽  
Author(s):  
Venkatesh Kodur ◽  
Mohannad Z. Naser
Keyword(s):  
Shear Loading ◽  
Shear Capacity ◽  
Valuable Insight ◽  
High Shear ◽  
Local Instability ◽  
Steel Girders ◽  
Fire Response ◽  
Limit States ◽  
Flexural Mode ◽  
Content Type

Purpose This purpose of this paper is to quantify the effect of local instability arising from high shear loading on response of steel girders subjected to fire conditions. Design/methodology/approach A three-dimensional nonlinear finite element model able to evaluate behavior of fire-exposed steel girders is developed. This model, is capable of predicting fire response of steel girders taking into consideration flexural, shear and deflection limit states. Findings Results obtained from numerical studies show that shear capacity can degrade at a higher pace than flexural capacity under certain loading scenarios, and hence, failure can result from shear effects prior to attaining failure in flexural mode. Originality/value The developed model is unique and provides valuable insight (and information) to the fire response of typical hot-rolled steel girder subjected to high shear loading.

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