Influence of Reinforcement Ratio to the Ductile Property in Prestressed Concrete Hollow Slab

2013 ◽  
Vol 671-674 ◽  
pp. 693-696
Author(s):  
Dong Han ◽  
Xiu Qin Cui ◽  
Rong Wu ◽  
Shi Ge Lv
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Prestressed Concrete ◽  
Steel Wire ◽  
Concrete Strength ◽  
Reinforcement Ratio ◽  
Analysis Method ◽  
Whole Process ◽  
Ductile Property ◽  
Steel Bar

The numerical analysis method is applied to simulate the whole process of bending. Keeping the section dimensions and the types of loads constant in prestressed concrete hollow slab with mid-strength spiral-rib steel wire, strength of concrete, strength of steel bar, reinforcement ratio, span-depth ratio and stretching control stress are analyzed and compared. The influence of reinforcement ratio to the ductile property in prestressed concrete hollow slab is discussed by numerical simulation.

Influence of Span-Depth Ratio to the Ductile Property in Prestressed Concrete Hollow Slab

2013 ◽  
Vol 671-674 ◽  
pp. 492-495
Author(s):  
Han Dong ◽  
Xiu Qin Cui ◽  
Shi Ge Lv
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Prestressed Concrete ◽  
Steel Wire ◽  
Concrete Strength ◽  
Analysis Method ◽  
Whole Process ◽  
Depth Ratio ◽  
Ductile Property ◽  
Steel Bar

The numerical analysis method is applied to simulate the whole process of bending. Keeping the section dimensions and the types of loads constant in prestressed concrete hollow slab with mid-strength spiral-rib steel wire, strength of concrete, strength of steel bar, reinforcement ratio, span-depth ratio and stretching control stress are analyzed and compared. The influence of span-depth ratio to the ductile property in prestressed concrete hollow slab is discussed by numerical simulation.

Discussion on the Influencing Factors of Deflection-Span Ratio at Failure in Prestressed Concrete Hollow Slab

2011 ◽  
Vol 255-260 ◽  
pp. 174-177
Author(s):  
Xiu Qin Cui ◽  
Hua Wei Zhao ◽  
Nan Zhao
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Prestressed Concrete ◽  
Steel Wire ◽  
Concrete Strength ◽  
Reinforcement Ratio ◽  
Analysis Method ◽  
Whole Process ◽  
Depth Ratio ◽  
Steel Bar

The numerical analysis method is applied to simulate the whole process of bending. Keeping the section dimensions and the types of loads constant in prestressed concrete hollow slab with mid-strength spiral-rib steel wire, span-depth ratio, reinforcement ratio, strength of concrete, strength of steel bar and stretching control stress are analyzed and compared. The influence of span-depth ratio, reinforcement ratio, strength of concrete, strength of steel bar, and stretching control stress on deflection-span ratio at failure of prestressed concrete hollow slab is discussed by numerical simulation.

Study on the Influencing Factors of Deflection-Span Ratio under Standard Load in Prestressed Concrete Hollow Slab

2012 ◽  
Vol 446-449 ◽  
pp. 156-160
Author(s):  
Xiu Qin Cui ◽  
Bing Guo ◽  
Yan He
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Prestressed Concrete ◽  
Steel Wire ◽  
Concrete Strength ◽  
Reinforcement Ratio ◽  
Analysis Method ◽  
Whole Process ◽  
Depth Ratio ◽  
Steel Bar

The numerical analysis method is applied to simulate the whole process of bending. Keeping the section dimensions and the types of loads constant in prestressed concrete hollow slab with mid-strength spiral-rib steel wire, strength of concrete, strength of steel bar, reinforcement ratio, span-depth ratio and stretching control stress are analyzed and compared. The influence of strength of concrete, strength of steel bar, reinforcement ratio, span-depth ratio and stretching control stress on deflection-span ratio under standard load of prestressed concrete hollow slab is discussed by numerical simulation.

Discussion on the Influencing Factors of Cracking Bending Moment in Prestressed Concrete Hollow Slab

2011 ◽  
Vol 94-96 ◽  
pp. 136-140
Author(s):  
Xiu Qin Cui ◽  
Bing Guo ◽  
Zhong Ren Feng
Keyword(s):  
Numerical Simulation ◽  
Prestressed Concrete ◽  
Steel Wire ◽  
Concrete Strength ◽  
Bending Moment ◽  
Reinforcement Ratio ◽  
Analysis Method ◽  
Whole Process ◽  
Depth Ratio ◽  
Steel Bar

The numerical analysis method is applied to simulate the whole process of bending. Keeping the section dimensions and the types of loads constant in prestressed concrete hollow slab with mid-strength spiral-rib steel wire, strength of concrete, strength of steel bar, reinforcement ratio, span-depth ratio and stretching control stress are analyzed and compared. The influence of strength of concrete, strength of steel bar, reinforcement ratio, span-depth ratio and stretching control stress on ratio of cracking bending moment and design bending moment of prestressed concrete hollow slab is discussed by numerical simulation.

Seismic Behavior of Coupled Eco-Composite Wall

2015 ◽  
Vol 744-746 ◽  
pp. 279-282
Author(s):  
Li Na Hou ◽  
Bao Jun Wen
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Influencing Factors ◽  
Seismic Behavior ◽  
Concrete Strength ◽  
Low Frequency ◽  
Shear Capacity ◽  
Wall Structure ◽  
Steel Bar ◽  
Composite Wall

Coupled eco-composite wall is one of the most commonly used lateral-load resisting member in eco-composite wall structure. The test of a coupled eco-composite wall under low-frequency cyclic loading is carried out to study the seismic behavior of the coupled eco-composite wall. At the same time, the main influencing factors of shear capacity for the wall are analyzed by numerical simulation. Experimental results and numerical analysis show that: the coupled eco-composite wall has better seismic performance in contrast with the standard wall, and such factors as shear-span ratio, ribbed steel bar, block strength, section height and reinforced area of end column and concrete strength of end frame column are the main influencing factors of shear capacity 。

scholarly journals Numerical simulation of beam-to-column joints with flange cleats

2018 ◽  
Vol 174 ◽  
pp. 03009
Author(s):  
Agnieszka Jabłońska-Krysiewicz ◽  
Jakub Gołowczyc
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Experimental Studies ◽  
Steel Frames ◽  
Economic Benefits ◽  
Steel Beam ◽  
Analysis Method ◽  
Initial Value ◽  
Fem Model ◽  
Analysis And Design

Although the effect of semi-rigid steel beam-to-column connections on the behaviour of steel frames and their substantial economic benefits are recognized nowadays, many structural analyses still consider connections as either fixed or pinned. For that reasons, there is need to be able the generate moment-rotation responses of semi-rigid connections that can be used for analysis and design proposes. Characteristic of the joints can be found using FEM models. The objective of the analysis was to find moment-rotation curves for beam-to-column joints with flange cleats and compare them to curves obtained from experimental studies. Numerical elastic-plastic 3D finite models was performed in order to establish a numerical analysis method for evaluating deformation of connections. For all joints there were obtained the FE results lightly underestimates results achieved from experiments. Some differences in the initial value of stiffness and resistances indicate the need for further work on improving FEM models. The inclusion of dimensional deviations of the IPE nad HEB sections, variability in the values of the prestressing forces of the bolts and the not centric positions of the bolts in the holes in the FEM model may contribute to increasing the degree of compliance of the results from experimental and numerical analyzes.

The Analysis of the Reliability and Design for Mechanical Anchorage of HRB500 Steel Bars

2011 ◽  
Vol 94-96 ◽  
pp. 970-974
Author(s):  
Xian Rong ◽  
Peng Cheng Liu ◽  
Xue Li
Keyword(s):  
Concrete Strength ◽  
Concrete Cover ◽  
Statistical Regression ◽  
Analysis Method ◽  
Anchorage Length ◽  
Pull Out ◽  
Steel Bar ◽  
Steel Bars ◽  
Mechanical Anchoring ◽  
Cover Thickness

The factors on mechanical anchoring performance of HRB500 steel bars, such as concrete strength, concrete cover thickness, diameter of steel bar, anchorage length of steel bar and transverse reinforcement ratio, were studied based on pull-out tests of 45 specimens. And the formula of mechanical anchoring bond strength for HRB500 steel bars was concluded by statistical regression analysis method. Through the reliability analysis, the mechanical anchoring length of design value and the table of conversion ratio between mechanical and direct anchoring length of HRB500 steel bars have been proposed. So it could be used as a basis for practical projects. The results indicate that the mechanical anchorage length of HRB500 steel bars can be still designed with the formula proposed in GB 50010-2002 “Code for design of concrete structures”.

scholarly journals FLEXURAL SIMULATION ANALYSIS OF RC T-GIRDERS STRENGTHED WITH POLYURETHANE CEMENT-PRESTRESSED STEEL WIRE ROPES

2021 ◽  
Vol 30 (4) ◽  
Author(s):  
Kexin Zhang
Keyword(s):  
Finite Element ◽  
Ultimate Load ◽  
Simulation Analysis ◽  
Steel Wire ◽  
Concrete Strength ◽  
Reinforcement Ratio ◽  
Structural Safety ◽  
Finite Element Program ◽  
Yield Load ◽  
Wire Ropes

To verify the effectiveness of polyurethane cement-prestressed steel wire ropes for flexural reinforcement of reinforced concrete T-girders, this paper conducts flexural test research on 12 pieces of T-girder specimens. Through the ABAQUS finite element program to build a model for numerical simulation, the results show polyurethane cement prestressed steel wire rope reinforcement can significantly increase the yield load and ultimate load of reinforced girders. Taking a girder in the test (20mm reinforcement thickness of polyurethane cement) as an example, yield load and ultimate load increased by 61.5% and 102.3% compared to unreinforced girder. The finite element model calculation results of T-girder bending reinforcement are in good agreement with the bending reinforcement test, and the error is only about 2%. For different strength concrete, the yield load increases slightly with the increase of concrete strength. For T-girders with different reinforcement ratios, the bearing capacity of strengthened girders changes significantly with the increase of longitudinal reinforcement ratio. The yield load of girders with reinforcement ratio of 1.82% and 1.35% is 29.84% and 65.85% higher than that of girders with reinforcement ratio of 0.91%. The yield deflection is 13.18% and 3.99% higher than that of girders with reinforcement ratio of 0.91%. It can be concluded that the bending reinforcement method of polyurethane cement prestressed steel wire ropes can effectively strengthen the main girder and ensure the structural safety.

The Study on the Construction Technology of Large-Scale Underground Interchange Tunnels under the Rivers

2012 ◽  
Vol 170-173 ◽  
pp. 1583-1594
Author(s):  
Gen Qiao Zhu ◽  
Zhi Lin
Keyword(s):  
Numerical Analysis ◽  
Mechanical Behavior ◽  
Large Scale ◽  
Design Parameters ◽  
Construction Technology ◽  
Analysis Method ◽  
Whole Process ◽  
Practical Engineering ◽  
Construction Organization ◽  
Important Design

A Large-scale underground interchange tunnels will be applied in the Chongqing Two Rivers Tunnel project with six crossings and four interchanges adopting NATM. The paper analyzes and discusses the whole-process construction mechanical behavior of the underground interchange by the numerical analysis method, at the same time considering the similar project established, and then suggests some important design parameters about crossings and close overlap interchanges between NATM tunnels, such as proper space of crossings and interchanges. Through the analyses, the paper suggests the design and construction method and construction organization project, especially for the crossings and close overlap interchanges between the NATM tunnels. The paper discusses the key problems of an underground interchange tunnels, and first suggests a mode how to construct an underground interchange tunnels. So, it is important in theory and practical engineering.

scholarly journals Extrusion of Multi-Material Components

2014 ◽  
Author(s):  
Nooman Ben Khalifa ◽  
Annika Foydl ◽  
Daniel Pietzka ◽  
Andreas Jäger ◽  
A. Erman Tekkaya
Keyword(s):  
Numerical Analysis ◽  
Steel Wire ◽  
Reinforcement Ratio ◽  
Extrusion Force ◽  
Material Distribution ◽  
Composite Rod ◽  
Aluminum Profiles ◽  
Analytical Approaches

Three innovative extrusion processes for the manufacture of multi-material parts are discussed: co-extrusion of discontinuously steel reinforced aluminum profiles, composite extrusion of continuously steel wire reinforced profiles and composite rod extrusion. In the first two processes the embedded steel elements are not deformable while by composite rod extrusion both materials are deformable. By means of experimental and numerical analysis, the parameters that mainly influence the reinforcement ratio, the extrusion force as well as the material distribution are analyzed. On the basis of this, analytical approaches are deduced to describe the process limits for the technologies. The paper closes with examples of applications regarding the lightweight requirements as well as functional integrations by forming multi-materials.

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