GLASS FIBER REINFORCED CONCRETE IN THIN-WALLED CONSTRUCTIONS

Fibrous composites are progressive materials for buildings and structures. Structures based on them are characterized by high technical and economic characteristics. Glass fiber concrete is effective for thin-walled structures. Various principles of structural mechanics applied to fiber composites are pro-posed for solving design problems. The optimal configuration of the covering is determined by the sta-tionarity of its potential energy for given values of the calculated resistances of the material compo-nents. This formulation of the problem leads to a global minimum of the covering volume. In particu-lar, an axisymmetrically loaded spherical cover is considered; the optimal thickness is determined from the condition of equal resistance by the von Mises yield criterion. Types of elements for precast glass-fiber concrete of various spans are recommended. In addition, the shallow tunnels are consid-ered; they are a prevalent object of transport communications. The rationality of using the thin-walled spatial systems consisting of rectangular plates is established. The isoperimetric problem is solved for a given volume of material based on the generalized Lagrangian principles. The thickness of the rec-tangular plates of the spatial system of the tunnel is taken as a variable parameter.

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Homogeneous generalized yield criterion based elastic modulus reduction method for limit analysis of thin-walled structures with angle steel

Thin-Walled Structures ◽

10.1016/j.tws.2014.02.030 ◽

2014 ◽

Vol 80 ◽

pp. 153-158 ◽

Cited By ~ 5

Author(s):

LuFeng Yang ◽

Qi Li ◽

Wei Zhang ◽

Wenlong Wu ◽

Yinhe Lin

Keyword(s):

Elastic Modulus ◽

Limit Analysis ◽

Reduction Method ◽

Yield Criterion ◽

Thin Walled Structures ◽

Thin Walled ◽

Angle Steel ◽

Modulus Reduction

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A characteristic type of instability in the large deflexions of elastic plates. I. Curved rectangular plates bent about one axis II. Flat square plates bent about all edges

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1952.0153 ◽

1952 ◽

Vol 214 (1116) ◽

pp. 98-118 ◽

Cited By ~ 5

Keyword(s):

Bending Moment ◽

Rectangular Plates ◽

Elastic Plates ◽

Surfaces Of Revolution ◽

Characteristic Type ◽

Axis Ii ◽

Curved Structures ◽

Thin Walled Structures ◽

Instability Characteristic ◽

Thin Walled

Part I . From a general equation governing the bending of thin elastic plates into certain types of surfaces of revolution are derived expressions for the behaviour of rectangular plates with initial curvatures, subjected to pure bending about one axis. It is found that such plates exhibit the type of instability characteristic of thin-walled structures which depend for their stiffness on curvature. Curves are drawn showing the deformation suffered by such plates, and an expression for the critical bending moment at which instability occurs is obtained. Experimental results show satisfactory agreement. Part II . The analysis of part I is extended to deal with the case of flat square or rectangular plates loaded by distributed bending moments applied to all four edges. Curves are drawn to describe their behaviour, and they are found to exhibit the characteristic instability displayed by thin-walled curved structures. Experimental verification is satisfactory.

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The Effect of Combined Tensile-Torsional Loading Path on the Stress/Strain States of Thin-Walled Circular Tubes

Advances in Civil Engineering ◽

10.1155/2020/6692109 ◽

2020 ◽

Vol 2020 ◽

pp. 1-16

Author(s):

Yue Gao ◽

Fei Shao ◽

Qian Xu ◽

Linyue Bai ◽

Qingna Ma ◽

...

Keyword(s):

Strain Path ◽

Yield Criterion ◽

Stress Path ◽

Loading Path ◽

Torsional Loading ◽

Linear Hardening ◽

Circular Tubes ◽

Thin Walled ◽

Von Mises Yield Criterion ◽

Von Mises

In this paper, an elastoplastic analysis model of thin-walled circular tubes under the combined action of axial force and torque is discussed. Based on the von Mises yield criterion and the assumption of isotropic linear hardening, the methods of stress path and strain path loading are analyzed to study the effect of combined tensile-torsional loading path on thin-walled circular tubes. A finite element model is used to analyze the loading path effect on thin-walled circular tubes. A series of tensile and torsional tests are also carried out on 304 stainless steel thin-walled circular tubes using a universal testing machine. In addition, the consistency of the selected material with the von Mises yield criterion, the assumption of isotropic linear hardening, and other classical elastoplastic mechanics are verified. The theoretical calculation results, the numerical analysis results, and the experimental test results are analyzed and compared. The “primary effect” influenced by the stress path and the “recency effect” affected by the strain path are proved, and their application prospects are discussed. The influence of tensile-torsional loading path on the final stress and strain states of thin-walled circular tubes after entering the plastic deformation stage is concretely demonstrated, facilitating the understanding of the principles of the aforementioned two effects. The investigation for a general principle concerning the effect of loading history on the mechanical behavior of engineering materials, based on the classical plastic mechanics, has an important theoretical significance. It is of great theoretical importance for advancements in plastic yield theory and the establishment of more accurate loading conditions suitable for specific materials in engineering practice.

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Application of Glass Fiber Concrete under Thin-Walled Middle Partition Wall Construction in Tunnel

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/769/3/032079 ◽

2021 ◽

Vol 769 (3) ◽

pp. 032079

Author(s):

Yuanyuan Tian ◽

Yigong Wang ◽

Haixiang Nie ◽

Hongyue You ◽

Junjie Zhang ◽

...

Keyword(s):

Glass Fiber ◽

Partition Wall ◽

Fiber Concrete ◽

Thin Walled ◽

Wall Construction

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The local theory of elastoplastic deformation processes and the stability beyond elastic limits of thin-walled structures subjected to complex loading

Vietnam Journal of Mechanics ◽

10.15625/0866-7136/10222 ◽

1992 ◽

Vol 14 (1) ◽

pp. 1-9

Author(s):

Dao Huy Bich

Keyword(s):

Constitutive Relations ◽

Complex Loading ◽

Local Theory ◽

Rectangular Plates ◽

Thin Walled Structures ◽

Plastic Deformation Process ◽

Deformation Processes ◽

Thin Walled ◽

The Stability ◽

Loading Parameter

The paper is concerned with the complete constitutive relations of elasto-plastic deformation process theory. Using this theory the stability beyond elastic limits of thin-walled structures subjected to complex loading is analyzed. The proposed method of loading parameter is a combination of numerical and analytical solutions. Calculations have been carried out for rectangular plates and cylindrical shells in order to compare this method and its results with other theoretical and experimental works.

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