Stress Analysis by Two Cuboid Isoparametric Elements

Rezaiee‐Pajand, Mohammad; Karimipour, Arash

doi:10.13052/ejcm2642-2085.2851

Cited by 4 publications

(3 citation statements)

References 26 publications

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“…It is assumed that vertical cracks have appeared in the beam under the first stage of loading, thus the positive tensile stress in the concrete can be ignored [27], but the tensile effect of steel fibers needs to be considered and the tensile stress provided by the steel fibers is simplified into a rectangular distribution diagram, as shown in Figure 2, and the equilibrium relationship of the internal forces by the diagram, there are: In Equations ( 1), ( 2), F is x The equilibrium force in the direction, M is the equilibrium bending moment; η 1 and η 2 are the internal force arm factor; τ 1 is the shear stress in the precast beam at h y , σ f t is the equivalent tensile stress in the precast beam steel fibers, b is the width of the beam, h 01 is the beam height.…”

Section: Stress Analysis Of Sfrp Beam Sectionmentioning

confidence: 99%

Research on Mechanical Characteristics and Load-bearing Behavior of Nodes of Steel Fiber Concrete Arch Bridges

Kailiang,

Sen

2023

TECM

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Steel fiber reinforced concrete (SFRC) is a new type of composite material formed by dispersing discontinuous short steel fibers in a uniform and random direction throughout the concrete, which has excellent properties of tensile, shear and high toughness, can effectively improve the load-bearing capacity of arch bridges. In this paper, the mechanics of SFRP in the nodal structure of an arch bridge is initially explored by means of indoor model tests and numerical simulation studies. The results show that the maximum principal tensile stress occurs at the intersection of arch rib, arch foot and tie beam, and the maximum principal compressive stress occurs at the connection between arch rib and arch seat, which should be considered in the design. In this paper, we hope to understand the characteristics of the force and bearing capacity of this type of structure to provide a reference for similar projects.

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Section: Stress Analysis Of Sfrp Beam Sectionmentioning

confidence: 99%

Research on Mechanical Characteristics and Load-bearing Behavior of Nodes of Steel Fiber Concrete Arch Bridges

Kailiang,

Sen

2023

TECM

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“…Wang et al [ 13 ] studied the seismic response of an unequal-span subway station under different site conditions and presented the distribution of structural tensile damage and its variation rule with site conditions. Rezaiee-Pajand et al [ 14 – 18 ] suggested several new types of finite element and analytical methods that can be used for dynamic and damage analysis of underground structures. Shirkhani et al [ 19 – 23 ] studied the seismic damping systems for structures and evaluated their effectiveness.…”

Section: Introductionmentioning

confidence: 99%

Damage and failure of underground subway stations under different soil constraint conditions

Zhang

et al. 2023

PLoS ONE

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Investigations from past earthquakes have shown that underground subway stations can suffer excessive deformation under strong seismic loads, leading to the damage of critical components and the collapse of structures. This study presents the results of finite element analyses on the seismic damage of underground subway stations installed under different soil constraint conditions. The plastic hinge distribution and damage characteristics of cut and cover double-storey and three-storey subway stations are analyzed using the finite element method software ABAQUS. Combined with the static analysis results of the column sections, a discriminant method for bending plastic hinges is presented. The numerical results show that the collapse of the subway stations begins with the failure of the bottom columns’ bottom sections, which leads to the bending of the plates and the destruction of the whole structure. The bending deformation at the end section of columns has an approximatively linear relationship with the inter-storey drift ratio, and the change in soil conditions shows no apparent influence. The sidewall deformation behavior varies significantly under different soil conditions, and the bending deformation at the bottom section of sidewalls increases along with an increase in the soil-structure stiffness ratio at the same inter-storey drift deformation level. The sidewall bending ductility ratio of the double-storey and three-storey stations at the elastic-plastic drift ratio limit increases by 61.6% and 26.7%, respectively. In addition, the fitting curves between the component bending ductility ratio and inter-storey drift ratio based on the analysis results are also presented. The findings may provide a helpful reference for the seismic performance evaluation and design of underground subway stations.

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“…The experimental analysis obtained that the inter-ply slip phenomenon occurs when the inter-ply shear stress of asphalt pavement under tire action is greater than its inter-ply shear strength, resulting in an inter-ply slip on the pavement surface and leading to slip cracks in the surface layer. Jon A. Epps et al [22][23][24][25]. Summarized a large number of actual cases to conclude that the areas prone to slip cracking such as airports and highways often have large shear stresses, and pointed out that the main cause of slip cracking is the shear strength of the interlayer interface.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Characteristics and Correlation Analysis of Crack Propagation and Slip Cracking in Asphalt Pavement Surface Layer

Yin

2023

TECM

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With the rapid development in the field of road traffic, the problems of slip cracking and U-shaped cracks on the surface of asphalt pavement are becoming more and more prominent, which seriously affect the safety and service life of roads. In order to solve this problem, a reliable asphalt pavement model is established in this study by combining the joint simulation and secondary development of experimental test parameters. The model can accurately simulate the slip cracking of asphalt pavements under different conditions and provide detailed parametric analysis of the factors affecting crack development. The results show that the inter-ply bond damage no longer deteriorates when the inter-ply strength is 0.3 MPa, indicating that the form of inter-ply contact plays a role in controlling the development of slip cracks. In addition, the maximum interlayer shear stress increased by 21.1% during the increase of vehicle axle load from 100 kN to 200 kN on the asphalt pavement, which led to an increase in the length of slip cracks. Meanwhile, the maximum longitudinal tensile stress in the asphalt pavement surface layer increased by 10.2% and the maximum shear stress increased by 18.3% when the elastic modulus of the asphalt pavement surface layer was increased from 7500 MPa to 14500 MPa.

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Stress Analysis by Two Cuboid Isoparametric Elements

Cited by 4 publications

References 26 publications

Research on Mechanical Characteristics and Load-bearing Behavior of Nodes of Steel Fiber Concrete Arch Bridges

Research on Mechanical Characteristics and Load-bearing Behavior of Nodes of Steel Fiber Concrete Arch Bridges

Damage and failure of underground subway stations under different soil constraint conditions

Mechanical Characteristics and Correlation Analysis of Crack Propagation and Slip Cracking in Asphalt Pavement Surface Layer

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