Experimental Research on the Composite Steel-Concrete Beams with Partial Shear Connection

2011 ◽  
Vol 71-78 ◽  
pp. 954-958 ◽  
Author(s):  
Guo Fu ◽  
Wei Cui
Keyword(s):  
Experimental Research ◽  
Concrete Beams ◽  
Experimental Results ◽  
Simply Supported ◽  
Shear Connection ◽  
Steel Sections ◽  
Interface Slip ◽  
Theoretical Analyses ◽  
Good Agreement ◽  
Composite Steel

Experiments were conducted on 5 simply-supported composite steel-concrete beams (SCB) with compact steel sections to investigate their deflection behaviors. The influences of degree of shear connection and stud arrangement are discussed. The load-deflection relationships and the interface slip distribution along the span of the beam are analyzed. Based on the experimental research and theoretical analyses, the formulae are derived for the rigidity of the composite steel-concrete beams with partial shear connection. The predicted of deflection values are in good agreement with the experimental results.

Experimental Research on Interface Mechanic Behavior of the Composite Steel-Concrete Beams

2012 ◽  
Vol 204-208 ◽  
pp. 4471-4475
Author(s):  
Guo Fu
Keyword(s):  
Experimental Research ◽  
Concrete Beams ◽  
Bench Mark ◽  
Element Analysis ◽  
Shear Connection ◽  
Loading Mode ◽  
Steel Sections ◽  
Interface Slip ◽  
Test Process ◽  
Composite Steel

Experiments were conducted on 7 simply-supported composite steel-concrete beams (SCB) with compact steel sections to investigate their interface mechanic behavior. The influences of different loading mode, degree of shear connection and stud arrangement are discussed. The test process, specimen failure matter and uplift distribution along the span of the beam are analyzed. Based on the experimental research, the formulae are derived for the interface slip and uplift rigidity of the stud in composite steel-concrete beams. The present values bench-mark finite element analysis of load bearing capacity and deflection of composite steel-concrete beams.

Research on Stiffness Damage of Simply Supported Beam after Fire

2014 ◽  
Vol 1079-1080 ◽  
pp. 135-139
Author(s):  
Dong Fu Zhao ◽  
Mei Liu ◽  
Xiao Ruan Song ◽  
Dan Wang
Keyword(s):  
Fire Test ◽  
Reduction Method ◽  
Concrete Beams ◽  
Experimental Results ◽  
Simply Supported Beam ◽  
Static Test ◽  
Simply Supported ◽  
Damage Degree ◽  
Width Reduction ◽  
Good Agreement

First, a fire test on concrete beams was carried out. Then after the static test of simply supported beam, the phenomena of simply supported beamsbefore and after fire were compared in order to determine the damage degree ofmechanical property. Finally, the width reduction method was proposed tocalculate the stiffness of beam after fire. And the formula applied toengineering practice was also deduced. The comparison of calculation resultsand experimental results was in a good agreement.

scholarly journals Assessing the Instantaneous Stiffness of Cracked Reinforced Concrete Beams Based on a Gradual Change in Strain Distributions

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Chunyu Fu ◽  
Dawei Tong ◽  
Yuyang Wang
Keyword(s):  
Experimental Data ◽  
Reinforced Concrete ◽  
Cross Section ◽  
Concrete Beams ◽  
Internal Force ◽  
Experimental Results ◽  
Reinforced Concrete Beams ◽  
Gradual Change ◽  
Concrete Cracking ◽  
Good Agreement

Concrete cracking causes a gradual change in strain distributions along the cross section height of reinforced concrete beams, which will finally affect their instantaneous stiffness. A method for assessing the stiffness is proposed based on the gradual change, which is considered through modeling different strain distributions for key sections in cracked regions. Internal force equilibria are adopted to find a solution to top strains and neutral axes in the models, and then the inertias of the key sections are calculated to assess the beam stiffness. The proposed method has been validated using experimental results obtained from tests on five reinforced concrete beams. The predicted stiffness and displacements are shown to provide a good agreement with experimental data. The instantaneous stiffness is proven to greatly depend on the crack number and depth. This dependence can be exactly reflected by the proposed method through simulating the gradual change in concrete strain distributions.

Experimental Research on Bending Performance of Concrete Beams Reinforced with CFRP-PCPs Composite Rebars

2013 ◽  
Vol 438-439 ◽  
pp. 804-806
Author(s):  
Jiong Feng Liang ◽  
Jian Bao Wang ◽  
Jian Ping Li
Keyword(s):  
Experimental Research ◽  
Prestressed Concrete ◽  
Crack Width ◽  
Concrete Beam ◽  
Concrete Beams ◽  
Experimental Results ◽  
Flexural Behavior ◽  
Bending Performance ◽  
Reinforced Beams

The flexural behavior of concrete beams reinforced with CFRP-PCPs composite rebars was studied. Experimental results showed that the deflection of beams reinforced with highly prestressed prisms is at service loads coMParable to deflection of steel reinforced beam. Flexural cracks of CFRP-PCPs composite rebars reinforced beams are hairline before prism cracking, and widened after the prism cracking. When the concrete beam was reinforced with the prestressed concrete prisms, the crack width decreased as the prestress in the prism increased.

Investigation of Efficiency of Vibration Isolation for Cabins of Self-Propelled Machines

1996 ◽  
Vol 15 (4) ◽  
pp. 157-160
Author(s):  
Mikhail (Yudimovich) Liberman
Keyword(s):  
Experimental Research ◽  
Vibration Isolation ◽  
Experimental Results ◽  
Vibration Isolators ◽  
Elastic Elements ◽  
Oscillatory Energy ◽  
Good Agreement

A method for calculation of the efficiency of vibration isolating systems, which are used in self-propelled machines, is presented. The influence of parameters of vibration isolating systems (masses and stiffnesses of foundation, load and elastic elements of vibration isolators, losses of oscillatory energy in elements of system) on efficiency of vibration isolation is determined. Good agreement is found between theoretical and experimental results. Results of experimental research for vibration isolating systems, which are used in real machines (excavator and tractor), are presented.

scholarly journals About the use of semi-continuity in simply supported composite steel and concrete beams, to remove fireproof coatings for standard-fire resistance requirement of less than 30 minutes

2019 ◽  
Vol 12 (5) ◽  
pp. 1183-1204
Author(s):  
L. C. ROMAGNOLI ◽  
V. P. SILVA
Keyword(s):  
Fire Resistance ◽  
Concrete Beams ◽  
Local Buckling ◽  
Rotational Stiffness ◽  
Design Code ◽  
Simply Supported ◽  
Standard Fire ◽  
Equivalent Time ◽  
Lower Standard ◽  
Composite Steel

Abstract Previous studies of the behavior under fire conditions of composite steel and concrete beams, not subjected to local buckling (compact steel profile), showed that it’s not possible to justify, by design code methods, the absence of fire coating for 30 minutes standard-fire resistance requirement, even when considering the support rotational stiffness provided by the upper longitudinal slab reinforcement (semi-continuity). The purpose of this work is to verify the viability of this proposal for lower standard-fire resistance time, which, although rare, may occur with the use of the equivalent time method.

Experimental Research on Flexural Behavior of Self-Repairing Concrete Beams Applied to Seaport Wharf

2015 ◽  
Vol 744-746 ◽  
pp. 387-391
Author(s):  
Xin Yuan Cheng ◽  
Zhuo Bin Wen ◽  
Yi Gao
Keyword(s):  
Influencing Factors ◽  
Experimental Research ◽  
Concrete Beams ◽  
The Self ◽  
Flexural Behavior ◽  
Loading Capacity ◽  
Simply Supported ◽  
Maintenance Requirement ◽  
The Third ◽  
Glass Tubes

Based on the maintenance requirement of seaport wharf, the glass tubes filled with TY-6638 polyester adhesive or cyanogen gel adhesive were embedded in the self-repairing concrete to make the simply supported beams. Through the third-point bending experiment, the repairing capability and its influencing factors of two kinds of adhesive beams were analyzed from loading capacity and flexibility. The results show the loading capacity of cyanogen gel adhesive beams and polyester adhesive beams can be restored averagely to more than 90.0% after repair,so self-repairing concrete for maintenance of seaport wharf is technically feasible, it deserves to be studied farther.

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