Study on Temporary Load-Carrying System of Reinforced Concrete Structure on Construction

2011 ◽  
Vol 94-96 ◽  
pp. 1082-1086
Author(s):  
Shu Ping Cong ◽  
Lai Wang ◽  
Jin Sheng Han
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structure ◽  
Geometrical Model ◽  
Secondary Development ◽  
Early Age ◽  
Time Varying ◽  
Reinforced Concrete Structure ◽  
Concrete Members ◽  
Structure Reliability ◽  
Load Carrying

Load-carrying system of reinforced concrete structure on construction is different from load-carrying system on service life. This temporary load-carrying system is composed of shores and concrete members of early age on construction. Geometrical model and material property of structure are time-varying on construction. Through secondary development of ANSYS, the processes of placing concrete and removing shore are simulated on construction. Critical effect factors are determined through the analysis on mechanical property of temporary load-carrying system, such as shore stiffness, foundation stiffness and diurnal temperature difference. Results of analog calculation to temporary load-carrying system will provide basis for shoring system design and structure reliability analysis on construction.

Research Progress on Reinforced Concrete Laminated Slab in China

2012 ◽  
Vol 174-177 ◽  
pp. 263-267
Author(s):  
Ming Li ◽  
Zhe Zhe Sun ◽  
Wei Jian Zhao ◽  
Yong Liu
Keyword(s):  
Reinforced Concrete ◽  
Experimental Research ◽  
Concrete Structure ◽  
Early Stage ◽  
Research Progress ◽  
Horizontal Load ◽  
Reinforced Concrete Structure ◽  
Research Results ◽  
Load Carrying ◽  
New Generation

The development of new generation prefabricated reinforced concrete structure is still at an early stage in China. Reinforced concrete laminated slab, as an important horizontal load carrying member, is paid much attention to in research. Based on the research results about it in China, the progress of which is summarized, including the form, characteristics and experimental research of sandwich laminated slab, anti-ribbed laminated slab, and hollow laminated slab etc. Finally, the further research is prospected.

Reliability Analysis for Transverse Crack of Concrete Structure

2014 ◽  
Vol 501-504 ◽  
pp. 748-751
Author(s):  
Bin Cai ◽  
Xin Hui Liu
Keyword(s):  
Reinforced Concrete ◽  
Reliability Analysis ◽  
Concrete Structure ◽  
Reliability Index ◽  
Transverse Crack ◽  
National Standard ◽  
Reinforced Concrete Structure ◽  
Fuzzy Reliability ◽  
Limit States ◽  
Concrete Members

According to the national standard "Code for Design of Concrete Structure", the reliability index for the structural members of reinforced concrete have not been given, which are controlled by serviceability limit states. A methodological framework was proposed, which made use of fuzzy invalidation rule for reliability analysis of reinforced concrete members. Firstly, A membership function was chosen. Secondly, A equivalent function was established to deal with the fuzzy reliability of concrete structure by traditional JC method. Finally, the fuzzy reliability index of transverse crack of reinforced concrete structure was obtained.

Reliability Evaluation of Reinforced Concrete Structures of the Fuzzy Evaluation Model

2011 ◽  
Vol 255-260 ◽  
pp. 123-127
Author(s):  
Jian Qiang Chen ◽  
Wen Bo Li ◽  
Jin Huan Zhao
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structure ◽  
Evaluation Model ◽  
Reliability Evaluation ◽  
Reinforced Concrete Structures ◽  
Fuzzy Evaluation ◽  
Reinforced Concrete Structure ◽  
Structure Reliability ◽  
Comprehensive Judgment ◽  
Fuzzy Evaluation Model

Based on the fuzzy manthematics theory,two-grade fuzzy comprehensive judgement used in reinforced concrete structure reliability appraisal is studied, the fuzzy comprehensive appraising model of structure reliability is founded. The paper supplies a fuzzy evaluation model for reinforced concrete fuzzy comprehensive judgment from qualitative analyze to quantificational analyze.

Research on the Mechanical Properties of Concrete Members under Holding Load

2011 ◽  
Vol 255-260 ◽  
pp. 309-313
Author(s):  
Li Hua Lu ◽  
Hai Xia Sun ◽  
Si Li Chen ◽  
Gui Sheng Pan ◽  
Min Ji Yang
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Concrete Structure ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Reinforced Concrete Structure ◽  
Concrete Members ◽  
Practical Engineering

In order to study the bearing capacity conditions of the reinforced concrete structure in service in the phase of using,test the mechanical properties of the bending members of reinforced concrete structures under loading and not loading conditions,and compare and analyze the relationship of load and deflection, crack, steel strain,concrete face strain under the two conditions,has got the conclusion that the bearing capacity decreased almost 12% under holding load, and analyze the effect of the bearing capacity and deformation under holding load; use ABAQUS finite element to simulate bending members of reinforced concrete structures under holding loading,and the simulation values are very close to the experimental results; indicate that finite element simulation can be carried out in prediction the service life of reinforced concrete structure in practical engineering.

Test and Study on Impact of Corrosion on Bond Force between Steel and Concrete

2010 ◽  
Vol 36 ◽  
pp. 176-181
Author(s):  
Xian Feng He ◽  
Shou Gang Zhao ◽  
Yuan Bao Leng
Keyword(s):  
Reinforced Concrete ◽  
Corrosion Rate ◽  
Concrete Structure ◽  
Steel Corrosion ◽  
Reinforced Concrete Structure ◽  
Bond Force ◽  
Steel Bars ◽  
Protection Layer ◽  
Corrosion Of Steel ◽  
The Impact

The corrosion of steel will have a bad impact on the safety of reinforced concrete structure. In severe cases, it may even be disastrous. In order to understand the impact of steel corrosion on the structure, tests are carried out to study corrosion and expansion rules of steel bars as well as the impact rules of corrosion on bond force between steel and concrete. The results show that wet and salty environment will result in steel corrosion; relatively minor corrosion will not cause expansion cracks of protection layers; when steel rust to a certain extent, it will cause cracks along the protection layer; when there exists minor corrosion in steel and the protection layer does not have expansion cracks, the bond force is still large and rapidly decreases as the corrosion rate increases.

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