Experimental study on effect of corrosion-induced cracking on bond property between deformed steel bar and concrete

Precast concrete building system has gained its popularity in Malaysia because of the many advantages such as high quality of structural components, less labour intensive at the construction site, and shorter completion time of a project. One of the constraints in precast concrete structures is to ensure that the connections are strong enough to ensure the structural integrity and robustness of the overall frames. In this study, a total of nine rectangular steel splice-sleeve connections were tested experimentally under incremental tensile loads. Two steel plates were inserted and welded to each end of the steel splice-sleeve. The steel plates act as shear key to provide the interlocking mechanism to the grout and to enhance the bond property between the grout and the splice. These plates were adopted to prevent the grout slippage from the sleeve. The grout strength, embedded steel bar lengths and the size of the steel sleeve splice were varied among the specimens to study their effect on the tensile performance of the connection. The results showed that the higher strength of grout, longer embedded length of steel bar and smaller size of the sleeve contributes to a higher ultimate tensile load.

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Experimental Study on Seismic Performance of Composite Reinforced Concrete Block Masnory

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.243-249.630 ◽

2011 ◽

Vol 243-249 ◽

pp. 630-635

Author(s):

Ying Jie Zhu ◽

Lan Li ◽

Wen Hui Yang

Keyword(s):

Experimental Study ◽

Reinforced Concrete ◽

Seismic Performance ◽

Failure Process ◽

Concrete Block ◽

Width Ratio ◽

Steel Bar ◽

Core Column ◽

Constructional Column ◽

Hysteresis Characteristics

Seismic performance under low cyclic experimental study on the six of constructional column- core column composite reinforcement concrete block masnory wall is preasented in this paper, considering the height-width ratio, window hole and without window hole, the setting of the horizontal reinforcing steel bar in the walls. Failure process and failure pattern, hysteresis characteristics, bearing capacity, ductility, skeleton curves, the viscous damping coefficient, stiffness and steel strain change the properties are analyzed, respectivily. Test results shown that this kind of composite reinforced concrete block masnory system has better seismic performance.

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Experimental Study on Influence on Structural Mechanical Behavior Caused by Steel Bar Corrosion of Hollow Slab Hinge Joints

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.163-167.1058 ◽

2010 ◽

Vol 163-167 ◽

pp. 1058-1062

Author(s):

Li Ying Peng ◽

Jun Wei ◽

Xia Ban

Keyword(s):

Experimental Study ◽

Theoretical Analysis ◽

Mechanical Behavior ◽

Steel Bar

Through experiment and theoretical analysis, this paper researched the influence of steel bar corrosion of hollow slab hinge joints on the structural mechanical behavior. The results showed that when load was little corrosion of hinge joints steel bar would do little to affect the joint between hollow slabs and hinge joints would work together with hollow slabs as a whole. When load was large, corrosion of hinge joints steel bar would decrease the joint between hollow slabs.

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