Cross-laminated timber flooring and concrete slab flooring: A comparative study of structural design, economic and environmental consequences

2019 ◽  
Vol 26 ◽  
pp. 100881 ◽  
Author(s):  
Osama A.B. Hassan ◽  
Fredrik Öberg ◽  
Emil Gezelius
Keyword(s):  
Comparative Study ◽  
Structural Design ◽  
Concrete Slab ◽  
Cross Laminated Timber ◽  
Environmental Consequences

Comparative Study on Design of Exposed Penstock Laid on Ground Using Chinese and American Specifications

2014 ◽  
Vol 580-583 ◽  
pp. 2000-2006
Author(s):  
Lei Hu ◽  
He Gao Wu ◽  
Chang Zheng Shi ◽  
Ying Han Xie
Keyword(s):  
Comparative Study ◽  
Wall Thickness ◽  
Structural Design ◽  
Shell Thickness ◽  
Pressure Vessels ◽  
Hydropower Station ◽  
Allowable Stress ◽  
Direct Factor ◽  
Safety Coefficient ◽  
Load Combination

In this paper, differences by using selected three typical specifications—DL/T 5141-2001 (Chinese), ASCE No.79 in the version of 1993(American) and ASCE No.79 in the version of 2012 (American)—in structural design of exposed steel penstock were explored. A practical example about exposed penstock laid on ground applied in hydropower station was also used to analyze specifications clearly. The result shows that the main differences between Chinese and American specifications are allowable stress and load combination. The former is direct factor of calculating exposed penstock shell thickness. Therefore, ASCE No.79 (2012) designs the minimum wall thickness, followed by DL/T 5141-2001 and the last is ASCE No.79 (1993), which is correspondingly contrary to sort by allowable stress. Basically, ASCE No.79 (2012) defines lower safety coefficient for exposed penstock, which is identical with authoritative rules of pressure vessels in the U.S.A and EU. The safety of DL/T 5141-2001 has been proved via rich engineering experience and this specification is recommended for Chinese projects. Besides, ASCE No.79 (2012) is recommended.

Microcomputer analysis of reinforced concrete slab systems

1993 ◽  
Vol 20 (4) ◽  
pp. 587-601 ◽  
Author(s):  
Pierre Léger ◽  
Patrick Paultre
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Structural Design ◽  
Concrete Slab ◽  
Three Dimensional ◽  
Structural Behaviour ◽  
Reinforced Concrete Slab ◽  
Element Analysis ◽  
Equivalent Frame ◽  
Frame Method

Microcomputer finite element analysis of reinforced concrete slab systems can now be routinely performed to produce realistic numerical simulation of three-dimensional structural behaviour. However, an efficient use of this approach requires an automated integration of design and analysis procedures. Guidelines for proper finite element modelling of slab systems are first presented along with simple post-processing algorithms to perform automatically the design or verifications from the analytical results. Numerical applications on simple slab systems subjected to uniform and concentrated loads are then used to illustrate the relative performance between finite element analyses and the equivalent frame method. Key words: microcomputer, reinforced concrete slab, finite element method, structural design.

Structural design of Cross Laminated Timber (CLT) by advanced plate theories

2010 ◽  
Vol 70 (9) ◽  
pp. 1368-1379 ◽  
Author(s):  
R. Stürzenbecher ◽  
K. Hofstetter ◽  
J. Eberhardsteiner
Keyword(s):  
Structural Design ◽  
Cross Laminated Timber

Temperature Gradient of Concrete Pavement Slab Overlaid with Asphalt Surface Course

2000 ◽  
Vol 1730 (1) ◽  
pp. 25-33 ◽  
Author(s):  
Tatsuo Nishizawa ◽  
Shigeru Shimeno ◽  
Akinori Komatsubara ◽  
Masashi Koyanagawa
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Thermal Stress ◽  
Temperature Gradient ◽  
Numerical Simulations ◽  
Structural Design ◽  
Concrete Slab ◽  
Concrete Pavement ◽  
Reduction Effect ◽  
The Relationship

In the structural design of composite pavement with a concrete pavement slab overlaid with an asphalt surface course, it is very important to estimate the temperature gradient in the concrete slab. An asphalt surface course reduces the temperature gradient in an underlaid concrete slab, resulting in the reduction of thermal stress of the concrete slab. This effect was investigated by temperature measurement in model pavements and by thermal conductivity analysis. Thermal properties were estimated by a backanalysis by using measured temperatures over 1 year. From the numerical simulations varying the thickness of asphalt surface and concrete slab, the relationship between the reduction effect and the asphalt thickness was derived as a function of the thickness of asphalt surface course, which can be used in the structural design of the composite pavement.

scholarly journals Design of the New Arch Bridge at Mioveni

2014 ◽  
Vol 3 (1) ◽  
pp. 12-22
Author(s):  
Dima Alexandru ◽  
Răcănel Ionuţ Radu
Keyword(s):  
Comparative Study ◽  
Steel Plate ◽  
Concrete Slab ◽  
Bridge Decks ◽  
Steel Bridges ◽  
Safety Factors ◽  
Arch Bridge ◽  
Longitudinal Stiffeners ◽  
Composite Solution ◽  
Bracing System

Abstract Road bridges with steel arches are used efficiently for medium and large spans. These solutions show advantages determined by the arches geometry, by the number and distributions of hangers and by the form and type of the arches bracing system. The appearance of the welding as standard connection procedure for steel bridges, for road bridge decks two solutions are mainly used: - the solution with a concrete slab acting together with the stringers and cross beams (the composite solution); - the solution with orthotropic deck (the orthotropic deck consists in a network formed by the continuous longitudinal stiffeners and cross beams connected at the upper part by a steel plate). In this paper a comparative study of the strength and fatigue checks performed on the new road bridge over river Argeşel near Mioveni in Argeş county is presented. The results are obtained using the Romanian standards STAS 1844-75 and SR 1911-1998 and the European norms SR EN 1990, SR EN 1993 and SR EN 1994. The deck was designed with two parallel steel arches, which are sustaining through vertical hangers a concrete slab connected with steel girders at the way level. The aim of the paper is to outcome the safety factors obtained from checks performed on steel hangers using the Romanian standards with respect with those obtained using Eurocodes.

Effects of Fibres on Improvement the Cracking in Concrete Slabs

2014 ◽  
Vol 1025-1026 ◽  
pp. 997-1004
Author(s):  
Arton Dautaj ◽  
Naser Kabashi ◽  
Cene Krasniqi ◽  
Patriot Ahmeti
Keyword(s):  
Structural Design ◽  
Composite Structures ◽  
Concrete Slab ◽  
Concrete Slabs ◽  
Design Requirement ◽  
Polypropylene Fibres ◽  
Hardening Process ◽  
Traditional Definition ◽  
Definition Of ◽  
Concrete Elements

The behaviour of concrete elements under loads, hydrated process and several conditions is one of the actually problems on improvement of structures or elements of structures. In this paper we analyze the problem of cracking, such a result of loading and hardening process of concrete. One of the way for improvement is using the polypropylene fibres , and creating the composite materials In this case of studies we used experimental examinations of concrete slab, such a model, for - slab (referent model) - slab with different percent of fibres The most of comparing results are on comparing the effect of fibres in improvement of energy capacity of concrete elements, and following the crack situation, or decreasing the dimensions of cracks. One of the most important value based on the behavior of the structure is ductility. The ductility is a structural design requirement in most design codes. The traditional definition of ductility cannot be applied to composite structures, but will be analyzed on the increasing the dissipations of energy. Several methods are used on the analyzing of this problem and propose to calculate the absorption the energy in concrete slab and to analyze the positions of cracks.

scholarly journals STUDI KOMPARASI ANTARA PRACETAK MASIF DAN FLY SLAB STUDI KASUS: STRUKTUR GEDUNG RUSUNAWA SURAKARTA

2018 ◽  
Vol 6 (2) ◽  
pp. 71-80
Author(s):  
Redaksi Tim Jurnal
Keyword(s):  
Comparative Study ◽  
Technological Development ◽  
Concrete Slab ◽  
Precast Concrete ◽  
Reduction Reaction ◽  
Structural Elements ◽  
Conventional Concrete ◽  
Style Transfer ◽  
Central Java ◽  
Concrete Plate

Fly slab is one of the precast concrete slab technological development that has been researched and patented by Ir . Sulistyana in 2011. The concept is how to reduce the mass of precast concrete slab with makes ribs on the concrete slab. To minimize the volume of concrete plate and while maintaining tensile area to makes the style transfer mechanism of concrete to reinforcement or otherwise, are expected to reduce the mass of the structure without reducing strength. Comparative study will be conducted in this research based on Planning of Building Construction Rusunawa in Surakarta, Central Java. This comparative study is done by compare the results of the structural design Rusunawa existing Surakarta and ready to build using conventional precast concrete massive, with a new structure plan Rusunawa Surakarta with using fly slab as material plate, beam and column structural elements using conventional concrete. Based on the analysis results, showed reduction in the volume of concrete and reinforcement elements beam and coloumn Rusunawa Surakarta structure is 20,25% and 6,3 %. Reduction reaction in the vertical structure of the Rusunawa Building in Surakarta is 16,93%.

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