Experiment research on the bending behavior of stainless steel reinforced concrete slabs

2014 ◽  
pp. 103-108
Keyword(s):  
Stainless Steel ◽  
Reinforced Concrete ◽  
Concrete Slabs ◽  
Experiment Research ◽  
Steel Reinforced Concrete ◽  
Reinforced Concrete Slabs ◽  
Bending Behavior

scholarly journals Investigation on Structural Behavior of Bamboo Reinforced Concrete Slabs under Concentrated Load

2021 ◽  
Vol 50 (1) ◽  
pp. 227-238
Author(s):  
Yanuar Haryanto ◽  
Nanang Gunawan Wariyatno ◽  
Hsuan-Teh Hu ◽  
Ay Lie Han ◽  
Banu Ardi Hidayat
Keyword(s):  
Reinforced Concrete ◽  
Concrete Slab ◽  
Absorption Capacity ◽  
Concrete Slabs ◽  
Structural Behaviour ◽  
Reinforced Concrete Slab ◽  
Concentrated Load ◽  
Steel Reinforced Concrete ◽  
Reinforced Concrete Slabs ◽  
Cracking Pattern

Reinforced concrete is perhaps the most widely used building material in the world. However, the materials used for reinforcement of concrete i.e. steel is quite expensive and scarcely available in the developing world. As a result, bamboo is considered to be a cheaper replacement with high tensile strength. This research investigated the structural behaviour of bamboo-reinforced concrete slabs used for footplate foundation subjected to concentrated load. For this purpose, four different reinforced concrete slab panels were developed and analyzed. The influence of replacing steel with bamboo for the reinforcement of concrete slabs on their structural behaviour was assessed by determining the load-deflection characteristics, the ultimate load, the stiffness, the ductility, the cracking pattern, and the energy absorption capacity. The results showed that in comparison to steel reinforced concrete slabs, the strength of 82% can be acquired by the bamboo reinforced slabs. Furthermore, ductility demonstrated by the two types of specimens was almost equivalent i.e. up to 93%. Those indicated that the structural behaviour demonstrated by bamboo reinforced slabs is quite comparable to that of steel reinforced concrete slabs. Therefore, bamboo can prove to be a promising substitute for steel in concrete reinforcement. Future studies may further examine this opportunity.

scholarly journals Flexural Behavior Performance of Reinforced Concrete Slabs Mixed with Nano- and Microsilica

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Rakesh Kancharla ◽  
Venkata Rao Maddumala ◽  
T. V. N. Prasanna ◽  
Lokaiah Pullagura ◽  
Ratna Raju Mukiri ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
High Performance ◽  
High Performance Concrete ◽  
High Strength ◽  
Flexural Behavior ◽  
Concrete Slabs ◽  
The Past ◽  
Reinforced Concrete Slabs ◽  
Concrete Mix ◽  
Bending Behavior

Present technology has been evaluated greatly over the past decades, where new particles are being designed and fabricated to fulfill specific needs. The field of nano- and micromaterials has prospered in many disciplines. It has been recently used in reinforced concrete in the production of high-strength, high-performance concrete. Microsilica (MS) and nanosilica (NS) particles have proven to be highly profitable to the concrete mix. Concrete has become denser with considerable improvement in their mechanical characteristics, particularly compressive strength. This proposed method includes a comparative study of the flexural bending behavior of conventional reinforced concrete (without MS or NS) slabs with other slabs. Each has various mixes of MS and NS particles incorporated into the concrete mix. The material content utilized in the slabs is kept constant by replacing a portion of the cement with an equivalent amount of either NS or MS particles or both. MS particles are altered from 0, 5, and 10% while NS particles are altered from 0, 0.5, and 1.0%. It cracks the widths and has higher final load-bearing capacity.

scholarly journals Determination of features of composite steel and concrete slab behavior under fire condition

2021 ◽  
Vol 6 (7 (114)) ◽  
Author(s):  
Valeriia Nekora ◽  
Stanislav Sidnei ◽  
Taras Shnal ◽  
Olga Nekora ◽  
Iryna Dankevych ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Temperature Distribution ◽  
Fire Resistance ◽  
Temperature Regime ◽  
Strain State ◽  
Concrete Slabs ◽  
Standard Temperature ◽  
Steel Reinforced Concrete ◽  
Steel Sheets ◽  
Reinforced Concrete Slabs

Methods for calculating the fire resistance of steel-reinforced concrete slabs made using profiled steel sheets under the influence of a standard temperature regime for more than 120 minutes are considered and analyzed. Research has been carried out to determine the heating parameters and the stress-strain state of steel-reinforced concrete slabs made using profiled steel sheets under fire conditions for more than 120 minutes. The results of this study allow to obtain indicators of temperature distribution for assessing the fire resistance of such structures for fire resistance classes above REI 120. Accordingly, the results obtained are a scientific basis for improving the existing method for calculating the fire resistance of steel-reinforced concrete slabs made using profiled steel sheets. The temperature distribution in the cross-section of structures was obtained using a general theoretical approach to solving the problem of heat conduction using the finite element method. Using the obtained temperature distributions, the parameters of the stress-strain state were determined based on the method of limiting states. To carry out the calculations, appropriate mathematical models were created that describe the effect of the standard temperature regime of a fire, to determine the temperature distribution at every minute in the sections of steel-reinforced concrete slabs with profiled steel sheets. A method is proposed for dividing the section into zones to take into account the decrease in the indicators of the mechanical properties of concrete and steel. A simplified method for the design assessment of steel-reinforced concrete slabs made using profiled steel sheets is proposed, which is consistent with the current EU standards and can be effectively used to analyze their fire resistance when establishing their compliance with the fire resistance class REI 120 and higher.

scholarly journals Calculation method steel reinforced concrete continuous bridge spans with two reinforced concrete slabs on the effect of concrete shrinkage

2021 ◽  
pp. 84-89
Author(s):  
Valerii Snytko ◽  
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Calculation Method ◽  
Concrete Bridges ◽  
Concrete Slabs ◽  
Steel Reinforced Concrete ◽  
Concrete Shrinkage ◽  
Reinforced Concrete Slabs ◽  
Reinforced Concrete Bridges ◽  
Bridge Spans

The article is considered calculation method steel reinforced concrete continuous bridge spans with two reinforced concrete slabs on the effect of concrete shrinkage. For long-term processes that must be considered when calculating the span structures of bridges, besides creep, concrete shrinkage applies. Object of study: composite steel and concrete span beam bridge with two reinforced concrete slabs. Purpose: to develop a calculation method the cross section steel reinforced concrete bridges with two reinforced concrete slabs on the effect of concrete shrinkage considering concrete creep. Continuous spans of steel reinforced concrete bridges with two reinforced concrete slabs over intermediate supports much more economically, in terms of metal consumption, compared to steel reinforced concrete bridges with one concrete slab. Cross section of a reinforced reinforced concrete beam consists of a steel part that combined with two reinforced concrete slabs. The article presents the results of the calculation of continuous steel-concrete superstructure of a road bridge with two reinforced concrete slabs by the above method.

scholarly journals An experimental study of a shear connection of steel-reinforced concrete slabs with angle shear studs

Vestnik MGSU ◽  
2021 ◽  
pp. 144-152
Author(s):  
Gennadij P. Tonkih ◽  
Denis A. Chesnokov
Keyword(s):  
Reinforced Concrete ◽  
Experimental Research ◽  
Laboratory Tests ◽  
Testing Machine ◽  
Design Parameters ◽  
Concrete Slabs ◽  
Steel Reinforced Concrete ◽  
Shear Connection ◽  
Reinforced Concrete Slabs ◽  
Steel Deck

Introduction. Angle shear studs, attachable by powder-actuated fasteners, are used as an alternative to traditional welded elements ensuring the shear connection of steel-reinforced concrete slabs. The objective is to revise their strength characteristics for different options of steel-reinforced concrete slab designs pursuant to SP 266.1325800.2016. Materials and methods. The programme of laboratory tests was developed in compliance with GOST R 58336-2018 to identify the strength behaviour of angle shear studs. Static shear testing of angle studs was performed at the LISMIiK laboratory of the Moscow State University of Civil Engineering using universal servo-hydraulic reconfigurable testing machine MTS.Multiaxial.DS1.4811.DS1.50019, designated for the testing of static and dynamic loads applied to large constructions. Displacements were measured by a tripod-mounted piston-type indicator. Results. The programme of theoretical and experimental research into the behaviour of a shear connection with angle shear studs in steel-reinforced concrete slabs that also had steel deck profile sheets was developed on the basis of the analysis of regulatory documents and sources of research information. Laboratory tests showed that the strength of the shear connection in an angle stud depends not only on the geometry of the steel deck, used as the stay-in-place formwork, but also on the position of a shear stud in the deck. Conclusions. The results of the theoretical and experimental research can be used to obtain new information about the strength and deformability of angle shear studs, connected by powder-actuated fasteners with the help of high strength expansion anchors; they allow to revise the currently used provisions governing the calculation of the reduction factor pursuant to SP 266.1325800.2016 with account taken of the design parameters of a shear connection.

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