The Concrete Structure Strengthen Technology and Engineering Application

2011 ◽  
Vol 194-196 ◽  
pp. 835-839
Author(s):  
Jun Hong Li
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Concrete Structure ◽  
Engineering Application ◽  
Steel Reinforcement ◽  
Reinforced Concrete Structure ◽  
Fiber Reinforced Plastic ◽  
Advantages And Disadvantages ◽  
Reinforced Plastic ◽  
Concrete Reinforcement

In this paper, the background of concrete structure strengthen is described, and several common methods of strengthening concrete structure in current construction are introduced. Also the advantages and disadvantages application of reinforcement methods are discussed. so as to valuable experiences for strengthening reinforced concrete structures are accumulate. Both the advantages and disadvantages of the reinforcement methods are described in detail. For example, the increasing cross-section reinforcement method, the replacing concrete reinforcement method, the bonding steel reinforcement method, the pasting steel reinforcement method, the pasting fiber reinforced plastic reinforcement method and so on. And so many accumulated experiences are provided for later strengthening reinforced concrete structure, and the process of strengthening concrete structure is improved.

Discussion on Formula for the Flexural Capacity of Concrete Beams Strengthened with FRP

2015 ◽  
Vol 1094 ◽  
pp. 278-281
Author(s):  
Xu Jun Chen ◽  
Qiao Yang ◽  
Jun Guo
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structure ◽  
Concrete Beams ◽  
Fiber Reinforced ◽  
Reinforced Concrete Structure ◽  
Flexural Capacity ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Tension Strength

The flexural capacity formula of reinforced concrete structure strengthened with FRP in Code for Design of strengthening concrete structure(GB 50367—2013) was introduced, and the rationality of the formula was analyzed. The results showed that the concrete compression height is independent of the tension strength of Fiber Reinforced Plastic (FRP), and the concrete compression height decreases with the increase of the tension strain of FRP, which is contrary to fact. The flexural capacity formula of reinforced concrete structure strengthened with FRP in Code for Design of strengthening concrete structure (GB 50367—2013) is worth discussing.

Structural Comparison and Project Cost Analysis on Two Kinds of Frame Structures

2012 ◽  
Vol 193-194 ◽  
pp. 1197-1200
Author(s):  
Zhong Min Liu ◽  
Xue Hua Liu ◽  
Jing Ji
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structure ◽  
Steel Structure ◽  
Development Trend ◽  
Economic Benefits ◽  
System Structure ◽  
Frame Structure ◽  
Reinforced Concrete Structure ◽  
Project Cost ◽  
Advantages And Disadvantages

This article introduces two kinds of frame structure system structure for steel structure and reinforced concrete structure, analyzes the similarities and differences in the structural properties, structural occupied area, time limit for a project, project cost and comprehensive economic benefits and other aspects. The advantages and disadvantages of them are analyzed, and the engineering cost is compared and analyzed. Results show that the steel structure has more the advantage than reinforced concrete structure, and it is development trend of factories and high-rise building in the future.

Effect of Interrupting Electricity Period on Electrochemical Chloride Extraction of Reinforced Concrete

2015 ◽  
Vol 754-755 ◽  
pp. 342-347
Author(s):  
Mien Van Tran ◽  
Dong Viet Phuong Tran ◽  
Mohd Mustafa Al Bakri Abdullah
Keyword(s):  
Reinforced Concrete ◽  
Corrosion Rate ◽  
Current Density ◽  
Concrete Structure ◽  
Chloride Concentration ◽  
Steel Reinforcement ◽  
Reinforced Concrete Structure ◽  
Half Cell ◽  
Cell Potential ◽  
Electrochemical Chloride Extraction

Electrochemical chloride extraction – ECE is an effective method to rehabilitate reinforced concrete structure, which has been corroded. This study investigated concentration of chloride remained in concrete and half-cell potential of the steel reinforcement after ECE using interrupting period of electricity current. Efficiency of ECE using Ca (OH)2was surveyed with two current density of 0.5 and 1A/m2. In this study, ECE treatment was proceeded intermittently in approximately 8 weeks. Results pointed out that chloride concentration decreased to 30 – 60% significantly, especially at in the vicinity of reinforcing steel. Simultaneously, half-cell potential of the steel reinforcement after 4 weeks halted treatment stabilizes in low-corrosion rate.

scholarly journals Analysis of different interface treatments between masonry of AAC blocks and reinforced concrete structure after uniaxial compression strength test

2021 ◽  
Vol 71 (343) ◽  
pp. e252
Author(s):  
D.S. Silva ◽  
E.G.P. Antunes
Keyword(s):  
Reinforced Concrete ◽  
Uniaxial Compression ◽  
Concrete Structure ◽  
Load Capacity ◽  
Maximum Load ◽  
Steel Reinforcement ◽  
Reinforced Concrete Structure ◽  
Uniaxial Compression Strength ◽  
Compression Resistance ◽  
Interface Treatment

Autoclaved aerated concrete (AAC) masonry is widely used in civil construction but requires further investigation. Hence, this experimental study evaluated three types of interface treatment between the reinforced concrete structure and AAC masonry, in scale, after a uniaxial compression resistance test. The types of interface treatment considered are reinforcement with steel bars, with rough polymeric cementitious mortar, and without treatment. The maximum load capacity, displacements, and occurrence of cracks were analysed. The results showed that the maximum individual load capacity did not significantly differ among the examined groups. However, the analysis of the displacements and cracks showed that the group with steel reinforcement had the smallest displacements and largest cracks. This behaviour is owing to the greater solidarity of forces conferred by steel reinforcement.

Cable stayed bridge over the Crati river in Cosenza

2021 ◽  
Author(s):  
Pierangelo Pistoletti ◽  
Marcello Vaccarezza ◽  
Simone Varni ◽  
Paolo Roggero ◽  
Marco Sciarra
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Concrete Structure ◽  
Constant Width ◽  
Variable Cross Section ◽  
Variable Cross ◽  
Middle Plane ◽  
Reinforced Concrete Structure ◽  
Cable Stayed Bridge ◽  
The City

<p>The “Bridge over the Crati River” is a cable stayed bridge in a single span of 114.725m, designed by the architect Santiago Calatrava for the city of Cosenza. The main elements are the main tower, the deck, the cables, the reinforced concrete pier and the abutments; one of those is the restraint of the main rear cables. The steel tower has a variable cross section that tapers towards the top where the cables anchoring devices are located. It is inclined of 51° from the vertical and it is anchored by means of 2 anchor stays. The bridge is composed of two parts: a reinforced concrete structure with a span of 30 m that overhangs the railway and the composite cable-stayed bridge with a span of 114.725 m. The cross section of the bridge has a constant width of 24 m all over its length. The deck is sub-divided in four vehicle lanes, two in each direction, divided by a central pedestrian lane slightly raised in comparison with the vehicle lanes. There are 40 stays, placed symmetrically in respect to the middle plane of the structure and arranged according to a mixed geometry between an harp and a fan shape to facilitate the positioning of the anchoring devices at the top of the pylon.</p>

Experimental Study of Corrosion Sensors for the Design Technology of Bridge Longevity

2014 ◽  
Vol 597 ◽  
pp. 421-424
Author(s):  
Jin A Jeong
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structure ◽  
Corrosion Potential ◽  
Steel Corrosion ◽  
Chloride Content ◽  
Steel Reinforcement ◽  
Reinforcement Corrosion ◽  
Reinforced Concrete Structure ◽  
Corrosion Condition ◽  
Potential Measurement

Corrosion of steel reinforcement is a major factor in the deterioration of harbor and bridge structure. Steel corrosion in concrete must be checked for investigating the condition of a reinforced concrete structure. The several way how to measuring corrosion condition of reinforced concrete, but the corrosion potential measurement is a very simple, rapid, cost-effective and non-destructive technique to evaluate the severity of corrosion in reinforced concrete structure. However some particular situations may not relate to the reinforcement corrosion probability and a simple comparison of the corrosion potential data with the ASTM Standard on steel reinforcement corrosion probability could prove meaningless because of environment factors as oxygen concentration, chloride content, the concrete resistance. Therefore this paper proposed compact designed corrosion sensors to monitor several corrosion factors, and the electrochemical measurement and evaluation have been carried out to investigate rebar corrosion, and a reasonable prediction of corrosion has been obtained in terms of nondestructive electrochemical point of view.

Experimental Research on the Character of Resist Explosion for Reinforced Concrete Structure of Sand Filling

2014 ◽  
Vol 543-547 ◽  
pp. 4014-4017
Author(s):  
Wan Peng Wang ◽  
Chun Ming Wang ◽  
Xing Tao Ren ◽  
Yun Xiao Cui ◽  
Ying Liang
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Concrete Structure ◽  
Damage Mechanics ◽  
Low Cost ◽  
Reinforced Concrete Structure ◽  
Hoop Strain ◽  
Simple Process ◽  
Central Cross Section ◽  
Explosive Charges

Explosion containment structure (chamber) is used to protect personnel and experimental equipment during the destruction of explosion environmental for research blasting or disposal exploder. Reinforced concrete has advantiage of low cost and simple process in buliding ,so it was usually used of buliding the structure of resist explosion.This paper demonstrates reinforced concrete structures character of resist explosion under envirmonent of filling sand,the hoop strain of structure central cross section were measured loaded by different mass explosive charges,the safe criterion of reinforced concrete structure was obtained. Loaded by the explosion,the damage mechanics of reinforced concrete structure that diameter equal to height was analysed,and the method for avoiding the structure fail was suggest.

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