Stiffness of Post-Tensioned Girderless Floor With Different Column Grids

The paper considers models of monolithic flat floor slabs with five spans in both directions. The cell sizes are 6×6m, 6×9m, and 6×12m. The calculation method is based on the application of temperature load and rope modeling of rod elements. It is shown that post-stressing should be used for slab side lengths over 7 m, as the installation of pre-stressed reinforcement for shorter lengths is less feasible and causes high economic costs.

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Large-Size Jointless Concrete Slab-on-Grade with Combined Prestressing

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.309.201 ◽

2020 ◽

Vol 309 ◽

pp. 201-207

Author(s):

Andrei V. Tur

Keyword(s):

Rational Design ◽

Structural Reliability ◽

Concrete Slab ◽

Theoretical Background ◽

Shear Stresses ◽

Ground Floor ◽

Flat Slabs ◽

Large Size ◽

Floor Slabs ◽

Post Tensioned

In the international and national practice of design, a different type of slab on the various types of grade are becoming increasingly common. For such structural elements, shrinkage and temperature influences in combination with low tensile stress, mainly in early age, leads to the risk of cracking in reinforced concrete structures, and as result, a reduction of its durability. The present article describes some of the possible ways of usage of the post-tensioned flat slabs and the rational design procedures to provide their structural reliability. The theoretical background of the punching resistance checking, in the case when the piles support the foundation post-tensioned slabs, presented. For ground floor slabs, an iterative method is given for determining design compression pre-stresses distribution in slab sections, taking into account the restrained effect created by the friction shear stresses in contact between the slab and the base. Besides, the article presents some practical implementations of the post-tensioned slabs as an artificial base in the presence of weak soils and as a large-size ground floor (slab-on-grade) without any joints.

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Study on Multi-Objective Optimal Planning of Electric Vehicle Charging Stations with Alternative Sites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1070-1072.1656 ◽

2014 ◽

Vol 1070-1072 ◽

pp. 1656-1663 ◽

Cited By ~ 1

Author(s):

Guang Chen ◽

Zhuo Ran Song ◽

Pan Dai ◽

Yang Liu ◽

Yong Ma

Keyword(s):

Calculation Method ◽

Pareto Front ◽

Economic Costs ◽

Multi Objective ◽

Charging Station ◽

Electric Vehicle Charging ◽

Proposed Model ◽

Alternative Sites ◽

Charging Stations

Planning of charging stations for electric vehicles (EVs) is the foundation of EV’s promotion and development. A novel multi-objective optimization model is proposed in this paper to better locate and size the charging stations for EVs from given alternative sites. Economic costs of charging station and the time wasted in waiting for charging are minimized in the model. The capacity constraints of the charging stations are included as main constraints. Pareto front is used to compare and estimate the practical value of the current substation locating and sizing plans. A calculation method based on rasterization and Voronoi diagram is proposed to make it clear where the jurisdiction of each charging station ends. Finally, the proposed model and calculation method are verified using case study.

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Structural Safety and Reliability of Post-Tensioned Floor-Slabs

IABSE Symposium Report ◽

10.2749/222137804796302275 ◽

2004 ◽

Vol 88 (5) ◽

pp. 31-36

Author(s):

Uwe Albrecht ◽

Gilbert Raynard

Keyword(s):

Structural Safety ◽

Floor Slabs ◽

Safety And Reliability ◽

Post Tensioned

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REALIBILITY OF THE LARGE SIZE POST-TENSIONED SLAB-ON-GRADE

Inżynieria Bezpieczeństwa Obiektów Antropogenicznych ◽

10.37105/iboa.6 ◽

2019 ◽

Author(s):

Andrei Tur ◽

Viktar Tur

Keyword(s):

Rational Design ◽

Structural Reliability ◽

Theoretical Background ◽

Shear Stresses ◽

Ground Floor ◽

Design Procedures ◽

Flat Slabs ◽

Large Size ◽

Floor Slabs ◽

Post Tensioned

The present article describes some of the possible ways of usage of the post-tensioned flat slabs and the rational design procedures to provide their structural reliability. Theoretical background of the punching resistance checking, in the case when the piles support the foundation pos-tensioned slabs, presented. For ground floor slabs, an iterative method given for determining design compression pre-stresses distribution in slab sections, taking into account the restrained effect created by the friction shear stresses in contact between slab and the base. In addition, the article presents some uncial practical implementations of the post-tensioned slabs as an artificial base in the presence of weak soils and as a large-size ground floor (slab-on-grade) without any joints.

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EXPERIMENTAL STUDY OF PUNCHING SHEAR OF UNBONDED POST-TENSIONED REINFORCED CONCRETE SLABS

Bulletin of the Tver State Technical University. Series «Building. Electrical engineering and chemical technology» ◽

10.46573/2658-7459-2020-4-6-14 ◽

2020 ◽

pp. 6-14

Author(s):

T.R. Barkaya ◽

◽

A.V. Gavrilenko ◽

V.V. Fedorov ◽

P.V. Kulyaev ◽

...

Keyword(s):

Reinforced Concrete ◽

Shear Test ◽

Punching Shear ◽

Concrete Slabs ◽

Reinforced Concrete Slabs ◽

Shear Loads ◽

Floor Slabs ◽

Geometrical Dimensions ◽

Positive Effect ◽

Post Tensioned

In this paper there are results of a punching shear test of slab samples, which were modeling post-tensioned reinforced concrete floor slabs when they are punched by columns. Geometrical dimensions of slab samples and properties of used materials are listed as well. There were 4 series of samples which differed to each other by level of prestress. Load have been applied through stamps of several types, which have allowed to research different positions of tensioned reinforcement relatively to the punching pyramid. Obtained results are discussed. Recommendations, which compliance may allow to obtain positive effect in ultimate punching shear loads for unbonded post-tensioned slabs are given.

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Experimental Investigation on Flexure Performance of New Steeldeck-Concrete Thermal Insulation Composite Floor Slabs

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.584-586.993 ◽

2014 ◽

Vol 584-586 ◽

pp. 993-996

Author(s):

Ping Zhou Cao ◽

De Li ◽

Rong Zhuo Lin

Keyword(s):

Experimental Investigation ◽

Bearing Capacity ◽

Thermal Insulation ◽

Calculation Method ◽

Experimental Results ◽

Floor Slabs ◽

Flexural Bearing Capacity ◽

New Formula ◽

Steel Deck

A new Steel deck-concrete composite floor slabs was proposed that with the effect of het preservation and insulation, and the flexure performance of the slabs has been studied. Calculation method of flexural bearing capacity was put forward. Based on comparative and analysis experimental results, it has been verified that the applicability of new formula of flexural bearing capacity of the new slabs.

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