scholarly journals DWT Based Deflection Optimization in Deck Slab with Free Vibration Analysis

2021 ◽  
pp. 285-291
Author(s):  
Nikhil Agrawal ◽  
Dr. Rajeev Chandak
Keyword(s):  
Reinforced Concrete ◽  
Free Vibration ◽  
Vibration Analysis ◽  
Concrete Slab ◽  
Free Vibration Analysis ◽  
Reinforced Concrete Slab ◽  
Deck Slab

This review presents several types of deck slab technologies that have appeared over the last 20 years. The slab is a reinforced concrete slab that can reduce the amount (volume) of voided concrete. However, it has only been used in one way and must be supported by a beam and / or a fixed wall. The idea was to make a deck slab two-axis slab with the same function as a solid slab, but the weight was significantly reduced due to excessive concrete removal.

scholarly journals Behavior of Self Compacting Reinforced Concrete One Way Bubble Deck Slab

2020 ◽  
Vol 23 (1) ◽  
pp. 1-11
Author(s):  
Ali H. Yaagoob ◽  
Ibrahem S. Harba
Keyword(s):  
Reinforced Concrete ◽  
Experimental Work ◽  
Ultimate Load ◽  
Concrete Slab ◽  
Experimental Program ◽  
Shear Reinforcement ◽  
Reinforced Concrete Slab ◽  
Ball Diameter ◽  
New Type ◽  
Deck Slab

Reinforced concrete slab with plastic voids (Bubbled Deck system) is a new type of slabs which has two-dimensional arrangement of voids within the slab that is developed to decrease the slab self-weight while maintaining approximately the same load carrying capacity as compared with the solid slabs. Plastic voided slabs have the ability to reduce concrete amount by about 30 percent and this reduction is so important in terms of cost saving and enhancement the structural performance. In this research paper investigation is carried out to study the shear strength behavior of one-way bubble deck slab using self-compacting reinforced concrete. The experimental program consists of testing thirteen one-way slabs with dimensions of (1700 length, 700 width and 150 thick) mm. One of the tested slabs is a solid slab (without balls) is used as a reference, the remaining twelve bubbled slabs with ball diameter (73, 60) mm are divided into five groups according to the parameters of the experimental work, the parameters of the experimental work include: type of slab (bubble and solid slabs), ball diameter (73, 60) mm, shear reinforcement and spacing between balls. The experimental results showed that the bubbled slabs without shear reinforcement have a decrease in the ultimate load as compared to solid slab by about 3.7% to 14.3% and an increase in the deflection at ultimate load by about 10% to 22%, at the same time the first crack load decreases by about 15.3% to 42.4% as compared to solid slab due to decreases of moment of inertia of bubble slab compared to solid slab. Also, the results showed that the bubbled slabs withe shear reinforcement (multi-leg) have an increase in the ultimate load as compared to solid slab by about 35.4% to 57.3% and an increase in the deflection at ultimate load by about 1% to 15%, at the same time the first crack load decreases by about 2.8% to 27.4% as compared to solid slab.

Experimental investigation of fibre-reinforced concrete deck slabs without internal steel reinforcement

1993 ◽  
Vol 20 (3) ◽  
pp. 398-406 ◽  
Author(s):  
Aftab A. Mufti ◽  
Leslie G. Jaeger ◽  
Baidar Bakht ◽  
Leon D. Wegner
Keyword(s):  
Reinforced Concrete ◽  
Concrete Slab ◽  
Steel Reinforcement ◽  
Punching Shear ◽  
Fibre Reinforced Concrete ◽  
Reinforced Concrete Slab ◽  
Shear Connectors ◽  
Deck Slabs ◽  
Concrete Deck ◽  
Deck Slab

It is now well established that concrete deck slabs of slab-on-girder bridges subjected to concentrated loads develop an internal arching system provided that certain conditions of confinement of the concrete are met. Because of this arching system, the deck slab, being predominantly in compression, fails in punching shear rather than in flexure. This aspect of deck slab behaviour, coupled with the corrosion problems associated with steel reinforcement in concrete, has prompted the authors to investigate the feasibility of fibre-reinforced concrete decks that are entirely devoid of steel. Through tests on a small number of half-scale models, it has been established that fibre-reinforced concrete slab with inexpensive non-ferrous fibres is indeed feasible, provided that the top flanges of the steel girders are connected just below the deck by transverse steel straps and the concrete deck is joined to the girders and diaphragms by shear connectors. The straps and shear connectors together provide the restraint necessary for development of the internal arching system in the slab, whilst the fibres control cracking due to the effects of shrinkage and temperature in the concrete. This paper describes the exploratory model tests and presents their results. Key words: deck slab, fibre-reinforced concrete, internal arching, punching shear, slab-on-girder bridge.

Sign in / Sign up

Export Citation Format

Share Document