Research on Strengthening Existing Bridges by Widening

2013 ◽  
Vol 639-640 ◽  
pp. 1092-1095
Author(s):  
Guang Hui Wang ◽  
Lian Shen ◽  
Cheng Long Wei
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
Basic Theory ◽  
Parameter Analysis ◽  
New Method ◽  
Analysis Model ◽  
Set Up ◽  
Existing Bridges

This paper aims to put forward a new method of strengthening the existing bridges with narrow decks and low bearing capacity to overcome the high cost and pollution problems in dismantling them. The method, strengthening bridges by built stringers and cross beams, is by widening some parts of a bridge. Based on the basic theory of finite element, we have set up an analysis model of strengthening the bridges by widening, which helps to demonstrate the rationality of this method. Meaningful conclusions have been drawn from the parameter analysis of the rigidity of the new widening stringers, the rigidity of the new cross beams and the relative settlement of the new and the old foundations. This method can be referenced by the reinforcement and maintenance of medium and small bridges.

Design and Research of Double-Drum Winch with Anti-Pressure Wheel

2012 ◽  
Vol 479-481 ◽  
pp. 1709-1713
Author(s):  
Kai An Yu ◽  
Tao Yang ◽  
Chang Zhi Gong
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
Finite Element Methods ◽  
Design Method ◽  
New Method

In view of the problems of large stress and severe bearing heating in double-drum winch at present, this paper adopted a new method to enhance bearing capacity for double-drum winch by adding anti-pressure wheels between two drums. Finite element methods were used to analyze the strength of 4000kN-traction double-drum winches with anti-pressure wheels and without anti-pressure wheels respectively. The results of the analysis revealed that the stress of the cylinder bearing decreased from 264MPa to 167MPa. The new method by adding anti-pressure wheels had remarkably improved the endurance of the bearing. Therefore, the design method can be widely used in large-traction double-drum winch.

Finite Element Analysis on Integral Structure of Light Steel Temporary Buildings

2013 ◽  
Vol 405-408 ◽  
pp. 921-924
Author(s):  
Xue Feng Cai ◽  
Zheng Zhang ◽  
Yong Chao Ma ◽  
Ji Zhong Zhou
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Simple Structure ◽  
Lateral Displacement ◽  
Structure Model ◽  
Analysis Model ◽  
Element Analysis ◽  
Finite Element Analysis Model ◽  
Integral Structure ◽  
Set Up

Light steel temporary building is commonly used in the construction site, with advantages on simple structure, repeat used and small deadweight. There are still not enough researches and relevant standards to conduct the design and construction of the buildings. In order to precede to theoretical study on integral structure of light steel temporary buildings a method which used to set up finite element analysis model about integral structure of light steel temporary buildings was proposed in this paper. The method is based on finite element analysis software, Ansys. Using this method a monolayer integral structure, a two-story integral structure and a trilaminar integral structure model were set up. Lateral displacement under design load of the integral structure was solved out by these finite element models.

scholarly journals Experimental and Numerical Analysis of The Used Hollow Slab

2018 ◽  
Vol 175 ◽  
pp. 01036
Author(s):  
Xudong Hua ◽  
Xingwei Xue ◽  
Junlong Zhou ◽  
Hai Zhang
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
Three Dimensional ◽  
Reinforced Concrete Structure ◽  
Analysis Model ◽  
Element Analysis ◽  
Dimensional Finite Element ◽  
Long Time ◽  
Bending Capacity ◽  
Three Dimensional Finite Element

The actual bearing capacity of a bridge in active service is crucial to the structure, but such data is generally difficult to obtain. In order to obtain the actual ultimate bending capacity of the used hollow slab, a destructive test of a hollow slab, which has been used ten years, has been carried out. Moreover, based on the experimental analysis of the material parameter data, a three-dimensional finite element nonlinear analysis model of the used hollow slab was established. Through the experiment and finite element analysis of the used hollow slab, the comparisons of the failure mode, crack propagating and ultimate bending capacity were focused on. The main conclusions obtained through the study are as follows: (1) Strand is a kind of stable prestressed material, which can maintain good mechanical properties for a long time; (2) The used hollow slab still maintains good ultimate bending capacity, although underwent a decreased rigidity due to long-term cumulative damage; (3) The total strain fracture model is qualified for simulating the nonlinearity of concrete material, and can obtain the ultimate bearing capacity of reinforced concrete structure effectively as well as simulates the development of cracks well.

New Approach to Treat Broken Pile in Cast-In Site Bored Pile

2013 ◽  
Vol 639-640 ◽  
pp. 615-618
Author(s):  
Guang Hui Wang ◽  
Cheng Long Wei
Keyword(s):  
Finite Element ◽  
Cement Paste ◽  
New Combination ◽  
Analysis Model ◽  
New Approach ◽  
Finite Element Software ◽  
Bored Pile ◽  
Bore Pile ◽  
Combination Approach ◽  
Set Up

Many cast-in-site bore pile have broken pile because of collapsing in wall of holl. Based on the principle of mechanics, a new combination approach was proposed for dealing with the broken pile. The approach is displacing the soil in the pile by cement paste and increasing the height and the steal ratio of the top beam which is on the defect pile. Using the finite element software, we have set up the analysis model of the approach, which helps to demonstrate the rationality of this method. This method can be referenced by the reinforcement and maintenance of the bridges.

Impact Studies on the Setting Styles of Stiffened Board to the Ultimate Strength of Tubular K-Joints

2010 ◽  
Vol 97-101 ◽  
pp. 2703-2706
Author(s):  
Feng Lin Gan ◽  
Yuan Peng ◽  
Chang Ye Chen
Keyword(s):  
Mechanical Property ◽  
Finite Element ◽  
Bearing Capacity ◽  
Ultimate Strength ◽  
Steel Structures ◽  
Steel Tube ◽  
Steel Pipe ◽  
Solid Models ◽  
Set Up ◽  
Stiffened Steel

This study taking the transmission steel pipe tower in the actual project as research background analyzes the mechanical property of stiffened steel tube K-joint. However, stiffened steel tube K-joint is not in the range of the code for design of steel structures GB50017━2003 of China. The corresponding solid models of finite element including K-joint in code of China and stiffened K-joint in actual project are set up to study the plastic distribution on post pipe and the influence of different setting styles of stiffened board to ultimate bearing capacity of K-joints. It was finally known that the stiffened K-joint has better mechanical property than unstiffened K-joint.

Masonry Homogenization Micro-Mechanics Analysis Model

2013 ◽  
Vol 838-841 ◽  
pp. 2242-2249
Author(s):  
Di Hu ◽  
Akenjiang Tuohuti
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
Yield Criterion ◽  
Superposition Principle ◽  
Homogeneous Material ◽  
Analysis Model ◽  
Linear Superposition ◽  
Material Stiffness ◽  
Mechanics Analysis ◽  
Linear Superposition Principle

Micro-mechanics models of masonry basic cell were established to obtain homogenized Young's module and Poissons ratio, according to the finite element homogenization analysis (FEA) results in x, y, z. Model results demonstrate that relatively small errors (less than 6%) occur compare with exact solution.The paper concentrates on the issue of linear homogenization, therefore, it can be used as effective estimates for homogeneous material stiffness degradation of nonlinear range. Through linear superposition principle, homogenization material yield criterion obtained from mechanics models, which can be used as the lower limit of cell bearing capacity.

Finite Element Analysis on Integral Structures of Mobile Steel Buildings

2014 ◽  
Vol 1049-1050 ◽  
pp. 260-263
Author(s):  
Zheng Zhang ◽  
Xue Feng Cai ◽  
Yong Chao Ma ◽  
Meng Yi Lian ◽  
Ji Zhong Zhou
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Steel Buildings ◽  
Analysis Model ◽  
Element Analysis ◽  
Story Structure ◽  
Finite Element Analysis Model ◽  
Integral Structure ◽  
Integral Structures ◽  
Set Up

Mobile steel building is a prefabricated building built in a factory, with advantages on moving conveniently, simple structure and scalability. There are still not enough relevant standards and requirements to conduct the design and construction of this kind of buildings. In order to precede to theoretical study on integral structures of mobile steel buildings a method which used to set up finite element analysis model about this kind of structure was proposed. This method is based on finite element analysis software, ANSYS. Using this method a two-story structure model with one box unit in each story was analyzed. Lateral deformations under design load of the integral structure were solved out by these finite element models and were compared with the former experimental results, and the results were discussed.

Analysis of Life-Cycle Fatigue for a Car’s Front Sub-Frame

2011 ◽  
Vol 63-64 ◽  
pp. 361-364
Author(s):  
Jiang Tao Xu ◽  
Yan Dong Song
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Bench Test ◽  
Analysis Model ◽  
Analysis Software ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Mechanical Products ◽  
Fatigue Life Analysis ◽  
Set Up

This paper based on the data of enterprise’s bench test, first set up the finite element analysis model for the front sub-frame by using the of professional finite element analysis software and fatigue life analysis software, then got the distribution information (such as the situation and the cycles) for the front sub-frame after analyzing, with these messages not only easily found out the danger area, but also provided reference for bench test improving, once more found a method that can forecast the life for mechanical products.

Structural behaviour of inner set bolted joints in steel tubes under tension

2020 ◽  
Vol 23 (8) ◽  
pp. 1601-1613
Author(s):  
Li Xing ◽  
Qingshuai Cao ◽  
Ru Zhang
Keyword(s):  
Finite Element ◽  
Yield Criterion ◽  
Steel Tube ◽  
Analysis Model ◽  
Structural Behaviour ◽  
Element Analysis ◽  
Response Characteristics ◽  
The Cross ◽  
Modelling Assumptions ◽  
Set Up

In this article, the structural behaviour of a new continuous joint of steel tube under tension is systematically studied. Structural analyses of six typical joints under tension are carried out. The experimental set-up and details of the specimens are introduced, followed by descriptions of the results and experimental observations. Based on the experimental results, the main behavioural patterns are discussed and the salient response characteristics related to stress concentration and capacity are examined. An ideal elastoplastic stress–strain relationship, Mises yield criterion and geometric nonlinear finite element analysis model are established, and a detailed description of the modelling assumptions is presented. A large number of finite element parameters are further analysed. The experimental and numerical findings presented in this article offer direct information on the influence of key bearing capacity properties, such as the plugged length of the cross-gusset, the area of the cross-gusset and the area of the cushion-plate, on the main response characteristics. The results also provide essential data for future analytical and design-oriented studies.

Structural Analysis of Composite Shield Cutter-Head and Cutters Arrangement Optimization Based on Finite Element

2010 ◽  
Vol 97-101 ◽  
pp. 3741-3744
Author(s):  
Yi Min Xia ◽  
Xi Wen Zhou ◽  
Jing Xue ◽  
De Zhi Luo
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Limit Load ◽  
Structural Features ◽  
Structure Design ◽  
Analysis Model ◽  
Element Analysis ◽  
Maximum Deformation ◽  
Set Up ◽  
Cutter Head

With the comprehensive use of finite element and computer simulation, the cutter-head was analyzed and optimized. Based on the full analysis of structural features of the cutter-head, the finite element analysis model of the cutter-head was set up by using Solidworks and ANSYS. The analyses of the cutter-head under two kinds of limit load conditions were carried out and the stress distribution of the cutter-head was obtained. According to the tunneling characteristics, the cutters were re-arranged. The analysis showed that under the same conditions, the stress distribution of the improved structure was more symmetrical and the maximum stress and maximum deformation also had a remarkable reduction. Also there was a greater stress between the corbel and the flange; it would be of vital significance to increase the welding strength of these parts. And the results could provide basic data for the structure design of cutter-head.

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