Study on Bearing Capacity of Beams Strengthened with Section Enlargement Method Considering Secondary Loading Process

2011 ◽  
Vol 368-373 ◽  
pp. 2200-2203 ◽  
Author(s):  
Si Meng Liu ◽  
Ma Sun ◽  
Qing Yang Liu
Keyword(s):  
Theoretical Analysis ◽  
Bearing Capacity ◽  
Ultimate Bearing Capacity ◽  
Civil Infrastructure ◽  
Rc Beams ◽  
Loading Process ◽  
Reinforced Beams ◽  
Bridge Strengthening ◽  
Non Linear ◽  
Reinforcement Beam

Bridges are the key components of civil infrastructure. Since decades ago, bridge strengthening and rehabilitation have become popular and their wider applications would be needed in the future. Although much research was carried in this field, some important problems including bearing capacity of reinforced beams didn’t form concordant views in this community. To research influence on bearing capacity of reinforced RC beams, we analyzed the loading process of RC reinforced beams from the beam-loaded-only stage to that of co-working of compound beams (including original beams and their strengthening layers), developed non-linear FEM program to simulate that loading progress, and finally validated the results with data from reference. This paper presents the theoretical analysis, and compares data yielded by program with those of experiment. We found that for adequate reinforcement beam the influence of secondary loading on the ultimate bearing capacity of reinforced beams is very limited. Our finding was confirmed by the experiment and FEM program.

Bearing Capacity of Beams Strengthened by Common Methods Considering Strain Lag Effect

2012 ◽  
Vol 166-169 ◽  
pp. 1789-1792 ◽  
Author(s):  
Si Meng Liu ◽  
Qing Yang Liu
Keyword(s):  
Bearing Capacity ◽  
Rc Beams ◽  
Critical States ◽  
Loading Process ◽  
Lag Effect ◽  
The World ◽  
Non Linear ◽  
Reinforcing Material

A lot of bridge reinforcement and rehabilitation projects are been implementing throughout China and many countries in the world. However, some fundamental questions still remain unsettled, and this paper addressed one of them, which is the bearing capacity of strengthened beams. We analyzed the loading process of beams after strengthening with strain lag effect, and focused on several critical states. To validate our conclusions, we developed a non-linear FEM program, and compared the data yielded by program with those from reference. We found that for adequate reinforcement RC beams the influence of strain lag effect on the bearing capacity depends on the property of reinforcing material. The conclusion matched with experiment very well.

scholarly journals Experimental Study and Theoretical Analysis on Flexural Mechanical Propertiesof Reinforced Timber Beams

2018 ◽  
Vol 27 (1) ◽  
pp. 096369351802700
Author(s):  
Xiong Xueyu ◽  
Wang Yiqingzi ◽  
Xue Rongjun ◽  
Lu Xuanxing
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
Failure Modes ◽  
Theoretical Calculations ◽  
Development Trend ◽  
Ultimate Bearing Capacity ◽  
Bending Test ◽  
Element Analysis ◽  
Finite Element Software ◽  
Reinforced Beams

As Chinese architecture masterpiece, ancient Hui-style architecture is the admiration for Chinese and foreign master builders. According to the bending test, the theoretical calculations and Abaqus finite element analysis on 5 Hui-style architecture beams, this paper points out the differences between un-reinforced beams and reinforced beams on ultimate bearing capacity, deflection and other performance indicators. The reinforcement methods of embedding steel bars, embedding CFRP bars and pasting CFRP plate can respectively improve the ultimate bearing capacity by 20.2%, 32.6% and 37.0%. Based on the plane section assumption and considering thereduction of tensile strength causedby wood knots and defects in tension zone, this paper predicts failure modes of the test beams may occur, and gives the ultimate bearing capacity of different failure modes. In addition, this paper uses the Abaqus finite element software for simulating test beams, and the development trend of load-deflectioncurve between the test and numerical simulation are in good agreement, providing reference for further research of Hui-style architecture.

Theoretical Analysis on the Ultimate Bearing Capacity for Steel Tubular Transmission Tower’s Joints with Annular Plate

2014 ◽  
Vol 664 ◽  
pp. 175-181 ◽  
Author(s):  
Zhi Juan Rong ◽  
Xue Ming Wang ◽  
Bao Hua Lv ◽  
Xin Yue Zhang ◽  
Ling Zhang
Keyword(s):  
Theoretical Analysis ◽  
Bearing Capacity ◽  
Annular Plate ◽  
Ultimate Bearing Capacity ◽  
Simplified Model ◽  
Force Distribution ◽  
Element Analysis ◽  
Energy Principle ◽  
State Of Stress ◽  
Principle Theory

The aim of this paper is to study the ultimate bearing capacity of steel tubular transmission tower’s joint with annular plate based on the theoretical analysis. A simplified model of annular plate joints was performed to investigate the force distribution of the tube-gusset joints. To obtain the state of stress and ultimate bearing capacity, the annular plate with clamped boundary condition on the inner edges and subjected to diametric loading is employed in this study by the direct integration and thin plate energy principle theory. Experiment and finite element analysis are carried out and the results show that both are the similar.

scholarly journals H-M Bearing Capacity of Cone-Shaped Foundation for Onshore Wind Turbine under Monotonic Horizontal Loading

2019 ◽  
Vol 2019 ◽  
pp. 1-14 ◽  
Author(s):  
GuoQi Xing ◽  
ChangJiang Liu ◽  
ShanShan Li ◽  
Wei Xuan
Keyword(s):  
Finite Element ◽  
Aspect Ratio ◽  
Theoretical Analysis ◽  
Bearing Capacity ◽  
Influence Factors ◽  
Fine Sand ◽  
Ultimate Bearing Capacity ◽  
Element Analysis ◽  
Horizontal Loading ◽  
Loading Eccentricity

In this paper, monotonic horizontal loading tests were carried out to study the bearing capacity of the cone-shaped foundation in marine fine sand. With load-controlled methods, the horizontal load was applied to the rod of cone-shaped foundation at loading eccentricity ratios of 5.0, 6.0, and 7.0. In addition, theoretical analysis was used to investigate the horizontal ultimate bearing capacity, and finite element analysis was also used in this paper to investigate the influence factors of the bearing capacity of cone-shaped foundation. Based on the theoretical analysis, the formula for horizontal ultimate bearing capacity was deduced. Test results show that, at the same loading eccentricity, cone-shaped foundation can provide higher H-M bearing capacity as well as lower lateral deflection compared to regular circular foundation for wind turbines. In addition, the deflection-hardening behavior of load-deflection curve for cone-shaped foundation is also observed. Numerical analysis results show that the H-M bearing capacity of the cone-shaped foundation increases with increasing aspect ratio and buried depth, however, and decreases with increasing loading eccentricity. Based on the results from finite element analyses, several equations to calculate the maximum moment bearing capacities are put forward, which take the aspect ratio, loading eccentricity, and embedded depth into account.

Stability Test on Aluminum Alloy Round Pipe for Structure

2011 ◽  
Vol 368-373 ◽  
pp. 253-257
Author(s):  
Yong Tao Gao ◽  
Ting He ◽  
Peng Bin Fu
Keyword(s):  
Aluminum Alloy ◽  
Theoretical Analysis ◽  
Bearing Capacity ◽  
Test Data ◽  
Slenderness Ratio ◽  
Ultimate Bearing Capacity ◽  
Stability Test ◽  
Stable Form ◽  
Data Record ◽  
Test Process

For the aluminum alloy pipe stable form and buckling capacity, axis compressing test for 4 sections which each specification in three members, total 36 members, thus, we work out the ultimate bearing capacity for a little slenderness ratio alloy round pipe and relation between slenderness ratio and coefficient of stability, to provide test data for drawing pillars curve of the same type member. Through observed aluminum alloy compressing member changing with test process, record test phenomenon, and combined with instruments of test data record, providing the basis for further theoretical analysis.

Experimental Study on Mechanical Behaviors of Damaged RC Beams after Reinforcement

2014 ◽  
Vol 638-640 ◽  
pp. 1330-1335
Author(s):  
Cong Qi Li ◽  
Wen Jie Ge ◽  
Da Fu Cao ◽  
Ling Long Pan ◽  
Bi Yuan Wang
Keyword(s):  
Experimental Study ◽  
Bearing Capacity ◽  
Concrete Structure ◽  
Ultimate Bearing Capacity ◽  
Rc Beams ◽  
Mechanical Behaviors ◽  
Sufficient Strength

Based on 6 testing beams in site cast, the mechanical behaviors of RC beams after reinforcement are analyzed. Concrete-replacing and grouting were used to reinforce the damaged component. When the reinforcement materials reached sufficient strength and maturity, beams were subjected to experiments of bending bearing capacity. Cracking load and ultimate bearing capacity were analyzed relatively, drawing some conclusions which could use as the reference of reinforcing concrete structure after damage.

scholarly journals Analysis on the Mechanical Performance of the Joints of the Wheel-coupler type formwork Support

2021 ◽  
Vol 261 ◽  
pp. 02070
Author(s):  
Shilong Jia ◽  
Fang Zhou ◽  
Zhongliang Chen
Keyword(s):  
Mechanical Properties ◽  
Bearing Capacity ◽  
Mechanical Performance ◽  
Ultimate Bearing Capacity ◽  
Displacement Curve ◽  
Ansys Software ◽  
Rotational Stiffness ◽  
Non Linear ◽  
Tension And Compression ◽  
Load Displacement

In order to study the mechanical properties of the joints, ANSYS software was used to simulate and analyse the failure form, ultimate bearing capacity, load-displacement curve and the rotational stiffness of the wheel-coupler joint node under force. Results: The wheel-coupler joint node has obvious non-linear characteristics when subjected to force; The bilateral symmetric tension and compression state could better reflect the failure form and deformation of the joint; The rotational stiffness of the wheel-coupler joint node under tension and bending was greater than that under bending and torsion, and was greater than that under tension, bending and torsion.

scholarly journals Failure Modes Analysis of Stone Arch Bridges

2015 ◽  
Vol 9 (1) ◽  
pp. 442-449
Author(s):  
Song Jun ◽  
Wang Fumin ◽  
Shi Kang
Keyword(s):  
Bearing Capacity ◽  
Failure Modes ◽  
Ultimate Bearing Capacity ◽  
Scale Model ◽  
Arch Bridge ◽  
Loading Process ◽  
Bridge Safety ◽  
Destruction Mechanism ◽  
Arch Bar ◽  
Arch Bridges

A destruction test based on the bridge safety appraisal is one way to verify the failure law of an actual bridge. In this paper, a stone arch bridge in a 1:10 scale model and with a span of 60 m (namely, an arch bar of the same length as the object of test) has been tested, methods of its whole test and loading process introduced, and ultimate bearing capacity, deflection and development rules of cracks in the loading process figured out. With the clarification of destruction mechanism, the ultimate forms of disease and remaining height of section have been acquired and, finally, the destruction theory of stone arch bridges has been verified and optimized.

Experiment on Flexural Capacity of Damaged RC Beams Strengthened with Composite CFRP

2014 ◽  
Vol 501-504 ◽  
pp. 932-935
Author(s):  
Tao Luo
Keyword(s):  
Bearing Capacity ◽  
Ultimate Bearing Capacity ◽  
Experimental Results ◽  
Rc Beam ◽  
Rc Beams ◽  
Reinforcement Effect ◽  
Flexural Capacity ◽  
Loading Test ◽  
Research Results ◽  
Cfrp Sheets

In order to study the flexural capacity of the seismic damaged RC beams after reinforcement, the bearing capacity and ductility are comprehensively evaluated, which is based on the results of three points of division loading test on 8 models which are divided into 4 groups. Experimental results show that compared with the direct pasting CFRP, the ultimate bearing capacity of RC beam strengthened by composite CFRP sheets is much higher, the average is 20.7%. Cracking load and ductility are also improved higher. The reinforcement effect of CFRP sheets is used very well. The research results provide advice and reference for the next seismic damaged RC beams in the reinforcement engineering.

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