scholarly journals Analysis of Four Types of Anchorage Devices for Prestressed Glulam Beam and Experimental Research

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6494
Author(s):  
Mingfei Li ◽  
Mingtao Wu ◽  
Nan Guo ◽  
Lidan Mei ◽  
Yan Zhao
Keyword(s):  
Bearing Capacity ◽  
Mechanical Performance ◽  
Damage Model ◽  
Experimental Result ◽  
Glulam Beam ◽  
Finite Element Software ◽  
Relationship Of ◽  
The Impact ◽  
Prestressed Beam ◽  
Prestressed Beams

An anchorage device is an integral part of the prestressed Glulam beams. Therefore, its rationality and practicability have significant effects on the mechanical performance of the prestressed beams. To investigate the impact of the anchorage devices on the bearing capacity and stiffness of the prestressed beams, this paper compared and analyzed four kinds of anchors in detail through the finite element software. The results showed that when the initial mid-span deflection was 5 mm, 10 mm, and 15 mm, the bearing capacity of prestressed beams with four anchorage devices was 80.37–177.24%, 93.56–182.51%, and 95.62–194.60% higher than that of ordinary Glulam beam, respectively. When the initial mid-span top prestresses were 1 MPa, 1.5 MPa, and 2 MPa, the bearing capacity of prestressed beams with four anchorage devices was 101.71–172.57%, 105.85–175.88%, and 109.64–180.87% higher than that of ordinary Glulam beam, respectively. In addition, based on the simulation results, the prestressed beam with the external anchorage had the highest bearing capacity and stiffness. The deformation capacity of the beam with boot anchorage was the largest. The stress distribution of the beam installed under beam anchorage was the most uniform, and the beam with slotted anchorage was easy to cause stress concentration at the notch. Finally, based on the outstanding performance of the external anchorage, it was selected to carry out one experiment, and the experimental result showed that the simulation could predict the damage model and load–deflection relationship of the prestressed beams well.

scholarly journals Seismic Damage Model of Bridge Piers Subjected to Biaxial Loading Considering the Impact of Energy Dissipation

2019 ◽  
Vol 9 (7) ◽  
pp. 1481 ◽  
Author(s):  
Shangshun Lin ◽  
Zhanghua Xia ◽  
Jian Xia
Keyword(s):  
Energy Dissipation ◽  
Structural Damage ◽  
Biaxial Loading ◽  
Mechanical Performance ◽  
Damage Model ◽  
Damage Index ◽  
Seismic Damage ◽  
Bridge Piers ◽  
Dissipated Energy ◽  
The Impact

The large degradation of the mechanical performance of hollow reinforced concrete (RC) bridge piers subjected to multi-dimensional earthquakes has not been thoroughly assessed. This paper aims to improve the existing seismic damage model to assess the seismic properties of tall, hollow RC piers subjected to pseudo-static, biaxial loading. Cyclic bilateral loading tests on fourteen 1/14-scale pier specimens with different slenderness ratios, axial load ratios, and transverse reinforcement ratios were carried out to investigate the damage propagation and the cumulative dissipated energy with displacement loads. By considering the influence of energy dissipation on structural damage, a new damage model (M-Usami model) was developed to assess the damage characteristics of hollow RC piers. The results present four consecutive damage stages during the loading process: (a) cracking on concrete surface, (b) yielding of longitudinal reinforcements; (c) spalling of concrete, and (d) collapsing of pier after the concrete crushed and the longitudinal bars ruptured due to the flexural failure. The damage level caused by the seismic waves can be reduced by designing specimens with a good seismic energy dissipation capacity. The theoretical damage index values calculated by the M-Usami model agreed well with the experimental observations. The developed M-Usami model can provide insights into the approaches to assessing the seismic damage of hollow RC piers subjected to bilateral seismic excitations.

Analysis of Influence of Design Parameters on Ultimate Bearing Capacity of the Steel Spatial Tubular Joint

2011 ◽  
Vol 243-249 ◽  
pp. 294-297
Author(s):  
Rui Tao Zhu
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Bearing Capacity ◽  
Plate Thickness ◽  
Ultimate Bearing Capacity ◽  
Design Parameters ◽  
Finite Element Software ◽  
Computing Model ◽  
Tubular Joint ◽  
The Impact

Utilizing general finite element software ANSYS, the finite element computing model of the steel spatial tubular joint is built, which is used to analyze the mechanical properties under dead loads through changing its design parameters. According to the obtained and compared consequences, the different design parameters including stiffening ring thickness, cross-shaped ribbed plate thickness and stiffening ring length exert different influence on ultimate bearing capacity of the steel spatial tubular joint. Specifically, the ultimate bearing capacity under dead loads is affected by setting stiffening ring and changing cross-shaped ribbed plate thickness significantly. In contrast, if the thickness and length of stiffening ring are changed, the impact is insignificant. The results and conclusion can provide reference which is useful to optimize the design of steel spatial tubular joint in such category.

scholarly journals Collapse Behaviour of a Concrete-Filled Steel Tubular Column Steel Beam Frame under Impact Loading

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Lian Song ◽  
Hao Hu ◽  
Jian He ◽  
Xu Chen ◽  
Xi Tu
Keyword(s):  
Finite Element ◽  
Impact Loading ◽  
Mechanical Performance ◽  
Impact Load ◽  
Frame Structure ◽  
Actual Condition ◽  
Transverse Impact ◽  
Time Curve ◽  
Finite Element Software ◽  
The Impact

The progressive collapse of a concrete-filled steel tubular (CFST) frame structure is studied subjected to impact loading of vehicle by the finite-element software ABAQUS, in the direct simulation method (DS) and alternate path method (AP), respectively. Firstly, a total of 14 reference specimens including 8 hollow steel tubes and 6 CFST specimens were numerically simulated under transverse impact loading for verification of finite-element models, which were compared with the existing test results, confirming the overall similarity between them. Secondly, a finite-element analysis (FEA) model is established to predict the impact behaviour of a five-storey and three-span composite frame which was composed of CFST columns and steel beams under impact vehicle loading. The failure mode, internal force-time curve, displacement-time curve, and mechanical performance of the CFST frame were obtained through analyzing. Finally, it is concluded that the result by the DS method is closer to the actual condition and the collapse process of the structure under impact load can be relatively accurately described; however, the AP method is not.

The Finite Element Analysis for Mechanical Properties of Reinforced FRP Pipe Concrete under Axial Compression - Discussing the Impact of Reinforcement Ratio, Concrete Strength

2013 ◽  
Vol 457-458 ◽  
pp. 1517-1522
Author(s):  
Wen Li ◽  
Hai Nan Yan ◽  
Peng Wang ◽  
Xiao Gang Chen ◽  
Li Na Yao
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Bearing Capacity ◽  
Axial Compression ◽  
Constitutive Relations ◽  
Concrete Strength ◽  
Ultimate Bearing Capacity ◽  
Reinforcement Ratio ◽  
Finite Element Software ◽  
The Impact

According to the basic idea of the finite element method, using the finite element software ANSYS to establish the finite element model of the reinforcement FRP pipe concrete under axial compression, introducing the unit selection in the process of building model ,based on the principle of meshing boundary conditions and constitutive relations selected; The significant degree of the model verified by compare with the test results. Analyzed by finite element reinforcement ratio, concrete strength and other factors on the mechanical properties of concrete under axial compression reinforcement FRP pipe, the analysis of the results shows: The increase of reinforcement ratio to improve the point load of the specimens and improve the composite column ultimate bearing capacity, but the reinforcement ratio increase will reduce the binding effect of the FRP pipe; The whole component be improved the strength of concrete can improve the ultimate bearing capacity, but it reduces the mechanical properties of the specimens.

scholarly journals The enhancement of filament winding in marine launching rubber gasbag

2019 ◽  
Vol 26 (1) ◽  
pp. 540-549
Author(s):  
Jiazhong Xu ◽  
Meijun Liu ◽  
Hai Yang ◽  
Tianyu Fu ◽  
Jiande Tian
Keyword(s):  
Bearing Capacity ◽  
Process Design ◽  
Filament Winding ◽  
Application Process ◽  
Application Performance ◽  
Finite Element Software ◽  
Polyurethane Composite ◽  
Contact Nonlinearity ◽  
Cord Fabric ◽  
Relationship Of

AbstractThe traditional craft of marine launching rubber gasbag that made by hand laying cord fabric has the disadvantages of irregular reinforcing direction and discontinuity of cord, which leads to the limitation of bearing capacity of gasbag and poor reliability. Based on the analysis of the structure of the rubber gasbag and geodesic winding pattern used in marine launching, the winding process design and experiment of the fiber reinforced rubber gasbag are carried out to solve the problem. The numerical simulation of the wound rubber gasbag is established by the finite element software ABAQUS in order to study the geometrical and contact nonlinearity of the gasbag, and the nonlinear relationship of parameters in application process, and then compare the application performance with those of the traditional cord fabric placement molding. Finally, the winding pattern test and deformation simulation experiment are carried out to verify the fact that the reinforced rubber gasbag with glass fiber / polyurethane composite material has a higher bearing capacity compared with the traditional handmade rubber gasbag. Thus, it provides theoretical and experimental evidence for the winding process of rubber gasbag.

scholarly journals The experimental study and finite element analysis of wheel - buckle scaffold

2020 ◽  
Vol 165 ◽  
pp. 06018
Author(s):  
Tan Wang ◽  
Kun Luo ◽  
Kuo Yuan ◽  
Shuai feng Yuan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Bearing Capacity ◽  
Mechanical Performance ◽  
Rapid Development ◽  
Great Influence ◽  
Steel Tube ◽  
Element Analysis ◽  
Finite Element Software ◽  
Torsional Instability

With the rapid development of the construction industry, the country has a higher demand for scaffolding engineering, so it is very necessary to develop and promote the application of wheel buckle scaffolding. Steel tube scaffold with wheel buckle has the characteristics of clear transmission and good mechanical performance. In order to study the structural performance of steel tubular scaffolding with wheel buckle, the single span three-step element frame was tested. The failure mode and ultimate bearing capacity of the frame are obtained. The finite element software Sap2000 was used to conduct 3d modeling and linear buckling analysis of scaffolds in the test. The results of experiments and finite element analysis show that the failure type of steel tubular scaffolding is the overall torsional instability failure. The connection stiffness at the joint of the diagonal brace fastener has a great influence on the wheel-buckle scaffold. The diagonal brace has obvious influence on the bearing capacity of steel tubular scaffolding body with buckles.

Analysis and Experimental Study on Mechanical Performance of the Extruded Forming Channel Type Embedded Part

2014 ◽  
Vol 578-579 ◽  
pp. 968-973
Author(s):  
Qian Tan ◽  
Chuan Guo Jia ◽  
Ying Min Li ◽  
Liu Liu
Keyword(s):  
Bearing Capacity ◽  
Mechanical Performance ◽  
New Technology ◽  
Work Load ◽  
Experimental Result ◽  
Element Analysis ◽  
Deformation And Failure ◽  
Pull Out ◽  
Extrusion Forming ◽  
Channel Type

A kind of channel type embedded part which has been disposed through extrusion forming new technology needed to extensive apply in engineering. Theoretical analysis and experimental research have been carried out on shear properties of bolt and one-way static pull-out performance of channel. Got the ultimate bearing capacity, deformation and failure mode, compared the results between test and finite element analysis, fit a formula for calculating the bearing capacity of channel. Experimental result shows that embedded parts working performance is good. It has higher strength than work load and the expected ultimate load according to the theoretical calculation. Meantime, specimens has relatively good ductility before failure. The test results have provided the experimental basis for the application of embedded parts in engineering.

Effects of Different Initial Imperfections including Residual Stress on the Compressive Bearing Capacity of Steel Angles in Towers

2012 ◽  
Vol 252 ◽  
pp. 167-171
Author(s):  
Bin Rong Zhu ◽  
Jing Bo Yang ◽  
Qing Hua Li
Keyword(s):  
Residual Stress ◽  
Bearing Capacity ◽  
Slenderness Ratio ◽  
Shell Element ◽  
General Purpose ◽  
Transmission Tower ◽  
Initial Imperfections ◽  
Finite Element Software ◽  
Steel Angles ◽  
The Impact

Angles are extensively used in latticed transmission tower. Initial imperfections have a significant impact on the compressive instability and failure of angle components. To study the impact of different initial imperfections on the compressive bearing capacity, general-purpose finite element software ANSYS is used. With shell element SHELL181, selecting angle L200×20 of the slenderness ratio of 20, 40, 60, 80, 100 and 120, the bearing performance analysis with initial imperfections is conducted, including initial bending, section defects, initial eccentricity, residual stress, and a combination of imperfections. At the same time, for the angle components of the optimal slenderness ratio of 40 and slenderness ratio of 80, under the single influence of initial bending, section defects and residual stress, how the size of the value of the imperfections affects the bearing performance is investigated.

scholarly journals Study on Bearing Capacity of Tank Foundation with Alternatively Arranged Vortex-Compression Nodular Piles

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5273
Author(s):  
Chun-Bao Li ◽  
Gao-Jie Li ◽  
Ran-Gang Yu ◽  
Jing Li ◽  
Xiao-Song Ma
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
Pile Foundation ◽  
Three Dimensional ◽  
Solid Model ◽  
Test Results ◽  
Finite Element Software ◽  
The Impact ◽  
Nodular Pile ◽  
Vortex Compression

Types of tapered piles are widely applied in tank foundation consolidation, but their inherent deficiencies in design and construction limit their further promotion. Vortex compression pile is a novel nodular pile. Compared with the traditional equal-section pile, vortex compression nodular pile is featured by stronger bearing capacity and slighter settlement. In this paper, the model test results showed that vortex compression nodular pile can greatly improve the bearing capacity and reduce the settlement. Through the finite element software ABAQUS analysis the bearing characteristics of equal-section pile foundation and vortex-compression nodular pile foundation were compared. The three-dimensional solid model was established by ABAQUS finite element software. The impact of cushion modulus, cushion thickness, vertical load, pile modulus, soil modulus around the pile on the bearing capacity of the vortex-compression nodular pile foundation were studied.

scholarly journals Using statistical methods to determine the load-bearing capacity of rectangular CFST columns

2018 ◽  
Vol 234 ◽  
pp. 04002 ◽  
Author(s):  
Glib Vatulia ◽  
Yevhen Orel ◽  
Maryna Rezunenko ◽  
Nataliia Panchenko
Keyword(s):  
Bearing Capacity ◽  
Composite Structures ◽  
Maximum Load ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Regression Parameters ◽  
External Reinforcement ◽  
Cfst Columns ◽  
Relationship Of ◽  
The Impact

In the current practice of construction and design of transport facilities, structures with external reinforcement are commonly used which effectively resist compression. The use of steel-concrete and composite structures enables us to reduce material consumption and cost of structures significantly. There are a few established approaches used to evaluate the load-bearing capacity of steel-concrete structures under axial and eccentric compression, each being based on the initial prerequisites, which underlie the calculation formulas. In this paper, the functional relationship of the value of the maximum load-bearing capacity of rectangular concrete-filled steel tubular (CFST) columns under axial compression with the random eccentricity is plotted. A regression model is proposed based on the methods of mathematical statistics, which allows for the evaluation of the impact of geometrical and physical characteristics of rectangular CFST columns on the value of their load-bearing capacity. The correspondence of the obtained model to the experimental data, as well as the significance of the regression parameters are confirmed by Fisher and Student criteria.

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