Experimental Study on Bonding Mechanism between Corroded Bolts and Grout

2007 ◽  
Vol 345-346 ◽  
pp. 1063-1066
Author(s):  
Ning Xia ◽  
Mao Sen Cao ◽  
Qing Wen Ren
Keyword(s):  
Experimental Study ◽  
Stress Distribution ◽  
Mechanical Behavior ◽  
Corrosion Product ◽  
Pullout Test ◽  
Bond Stress ◽  
Experimental Results ◽  
Bonding Mechanism ◽  
The Relationship ◽  
Front Section

In this study, an experiment program is presented to study the bonding mechanism between corroded bolts and grout and in particular the influence on bonding behavior in terms of different corrosion sections along anchor. With respect to four groups of manufactured bolt specimens, the noncorroded and the corroded, respectively, on the front, middle and rear section along anchor, a pullout test is conducted to reveal the relationship between load and loading-end slip and to investigate the bond-stress distribution characterization along full anchor. Experimental results show that corrosion product, acting as lubricating effect at the interface between bolts and grout, can result in the degradation of bonding mechanical behavior. Meanwhile, corrosion on different sections along anchor has a different effect on the anchorage capacity of bolts. Especially, corrosion on the front section induces the greatest decrease of anchorage capacity of bolts. Thus, it is concluded that the front section along anchor is the key region affecting the bonding mechanical behavior between bolts and grout.

Experimental Study on Full-Scale Segment Model of Huaian Cable-Stayed Bridge Pylon

2011 ◽  
Vol 243-249 ◽  
pp. 1866-1870 ◽  
Author(s):  
Hong Yuan Tang ◽  
Shao Ping Meng
Keyword(s):  
Experimental Study ◽  
Stress Distribution ◽  
Theoretical Analysis ◽  
Full Scale ◽  
Experimental Results ◽  
Horizontal Load ◽  
Experiment Study ◽  
Segment Model ◽  
Cable Stayed Bridge

Through experiment study on full scale segmental model of Huaian bridge pylon, the stress distribution in the segmental model under the U shaped tendons and the horizontal load was measured. At the same time, the critical cracking load and the coefficient cracking safety class of the anchorage zone were obtained. At last, the theoretical analysis was compared with the experimental results, the theory agreed with the experiment well.

Experimental Study of Mechanical Behavior of HPL Composites

2015 ◽  
Vol 732 ◽  
pp. 139-142
Author(s):  
Milan Žaludek ◽  
Soňa Rusnáková ◽  
Ladislav Fojtl ◽  
Vladimír Rusnák
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Mechanical Behavior ◽  
Mechanical Behaviour ◽  
Experimental Results ◽  
Environment Effect ◽  
Service Load ◽  
Flexural Tests ◽  
Load Conditions

The paper provides experimental results from tensile and flexural tests of HPL composites. Mechanical properties of HPL laminates from four worldwide producers (Fundermax, Polyrey, Abet and Rexin) are compared. Composites are compared due to their stiffness and strength, both tensile and flexural. The exterior environment effect on mechanical behaviour of composites in service load conditions are presented too.

Mechanical Behavior of the Rubber Blanket Used for Electrical Machine Hanging

2012 ◽  
Vol 501 ◽  
pp. 145-150
Author(s):  
Ti Kun Shan
Keyword(s):  
Stress Distribution ◽  
Mechanical Behavior ◽  
Compression Strength ◽  
Applied Load ◽  
Electrical Machine ◽  
Static Rigidity ◽  
Relationship Of ◽  
The Relationship

In order to get optimal properties of rubber blanket used for electrical machine hanging, FEM calculation is used to conduct stress distribution of rubber blanket to detect its rubber mechanical behavior, normal temperature static rigidity and compression strength, and detect the relationship of applied load and distortion. Ultimately, the simulative results are verified feasibly and their operating requirements are satisfied.

Experimental Study on Folding Patterns and Deployability of Inflatable Structures

2019 ◽  
Author(s):  
Sachiko Ishida ◽  
Hakimi Azuri
Keyword(s):  
Experimental Study ◽  
Automobile Industry ◽  
Experimental Results ◽  
Design Parameters ◽  
Inflatable Structures ◽  
Trade Off ◽  
Satellite Antenna ◽  
Folding Angle ◽  
The Core ◽  
The Relationship

Abstract In this study, the authors experimentally investigate the relationship between folding patterns and performances of inflatable structures; compactness and deployability. Inflatable structures are widely applied in various engineering fields such as airbags in automobile industry, inflatable building in architectural field, and inflatable satellite antenna and landing equipment to Mars in space engineering field. However, these two requirements can be a tradeoff, as a compact product is hard to deploy in general. As a possible solution, circular spiral patterns are adopted in this study, because 1) they can be simultaneously deployed along spiral fold lines that is an advantage on deployability, and 2) the removal of the core of the circular sheet can make the sheet folded more compactly that is an advantage on compactness. Inflation models with different design parameters are created and tested. As experimental results, the inflation time (i. e. deployablity) and the initial width (i. e. compactness) can be optimized simultaneously in terms of four design parameters, but a trade-off relationship is observed in terms of the rest parameter; the folding angle formed by the V-shaped fold lines.

scholarly journals The bond stress x slipping relationship

2016 ◽  
Vol 9 (5) ◽  
pp. 745-753 ◽  
Author(s):  
M. T. G. BARBOSA ◽  
E. S. SÁNCHEZ FILHO
Keyword(s):  
Experimental Study ◽  
Statistical Analysis ◽  
High Strength Concrete ◽  
High Strength ◽  
Bond Stress ◽  
International Standards ◽  
Experimental Results ◽  
Strength Concrete ◽  
Pull Out ◽  
Steel Bar

Abstract A few international standards regulate the use of the high strength concrete, which may not be adopted generally without consideration of the differences that can be among the materials in different countries. This paper presents the results of an experimental study consisting of pull out tests of Brazilian steel, with five different concrete strengths, 20, 40, 60, 80 and 100 MPa, and three different steel bar diameters, 16.0, 20.0 and 25.0 mm. The experimental results for the bond stress vs. slipping relationship were compared with the provisions of the CEB and with some theoretical formulations found in literature. One statistical analysis is made and equations for predicting the bond stress were derived.

scholarly journals Behavior of Fibrous Reinforced Concrete Splices

2021 ◽  
Vol 15 (1) ◽  
pp. 441-462
Author(s):  
Mereen H.F. Rasheed ◽  
Ayad Z.S. Agha ◽  
Bahman O. Taha
Keyword(s):  
Reinforced Concrete ◽  
Stress Distribution ◽  
Differential Equations ◽  
Steel Fiber ◽  
Fiber Content ◽  
Bond Stress ◽  
General Solutions ◽  
The Relationship ◽  
Bar Diameter ◽  
Concrete Stress

Background: The tangent of the relationship between bond stress and displacement (slip) is called the modulus of displacement and gives the basis for the theory. This theory is used to determine the stress distribution along the spliced reinforcement bars. Objective: This research presents a modification on the theory of the modulus of displacement to determine the stress distribution along the spliced reinforcement bond for fibrous reinforced concrete. Methods: 1- General differential equations are derived for concrete stress, stress in reinforcement bars and bond stress between reinforcement bars and surrounding concrete. 2-The general solutions of these D.E. are determined and Excel data sheets are prepared to apply these solutions and determine the concrete, steel and bond stresses. Results: Excel data sheets are prepared to determine the concrete, steel and bond stresses. The stresses are determined along the bar splice length considering the effect of steel fiber content. Conclusion: The maximum concrete stress is obtained at center x=0 and minimum at . Maximum bond stress obtained at and minimum at the center. The maximum steel stress at and minimum at . The value of (σcmax) increased linearly with increasing of (ρ). The concrete stress increased nonlinearly with (ρ%) and linearly with ( fy) and (fc’). Also increasing of (k) and bar diameter have small effects. The value of bond stress decreased linearly with (Qf) and (ρ%).

scholarly journals Experimental and Numerical Study of Bead Welding Behavior of HDPE Pipe Under Uniaxial Loading

2019 ◽  
Vol 23 (1) ◽  
pp. 183-191
Author(s):  
Azzeddine Belaziz ◽  
Mohamed Mazari
Keyword(s):  
Experimental Study ◽  
Mechanical Behavior ◽  
High Density Polyethylene ◽  
Numerical Study ◽  
Base Material ◽  
Welding Process ◽  
Experimental Tests ◽  
Experimental Results ◽  
Butt Welding ◽  
Hdpe Pipe

Abstract The present paper is devoted to the experimental study of the mechanical behavior of high-density polyethylene structure subjected to traction and welded by means of butt-welding process. We were based ourselves on experimental tests which have been carried out to characterize the material studied, introducing the ductility or fragility of the bead welded section, and understood the effect of crosshead speeds on the mechanical behavior of the weld bead. The experimental results of the welded specimens are compared with those corresponding to the base material. In this study, two crosshead speeds of 10 and 50 mm/min were applied to make the comparison.

Experimental Study on Preventing Web Defects Under Transportation of High Performance Optical Films With Micro-Groove and Concave Rollers

2011 ◽  
Author(s):  
Hiromu Hashimoto
Keyword(s):  
Experimental Study ◽  
High Performance ◽  
Experimental Results ◽  
Axial Diameter ◽  
Optical Films ◽  
Wrinkle Generation ◽  
The Relationship ◽  
Cylindrical Roller

In this paper, experiments on preventing wrinkles by using concave rollers compared with cylindrical rollers are described. Wrinkle generation is examined using the following four test rollers: a cylindrical roller with a uniform axial diameter, a cylindrical roller with micro-grooves, a concave roller with a diameter that increases towards the two ends, and a concave roller with micro-grooves. Moreover, the relationship between the use of a concave roller and wrinkle generation is clarified by comparing all experimental results.

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