scholarly journals TENDENCY IN STRUCTURAL ELEMENTS OF BUILDINGS FOCUSED ON REINFORCED CONCRETE SLAB WITH BEAMS

2020 ◽  
Vol 26 (62) ◽  
pp. 37-42
Author(s):  
Nagayoshi SOU ◽  
Yoshihisa NAKATA ◽  
Kazuki TAJIMA ◽  
Takumi ARAMAKI ◽  
Atsunori MIYATA ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Concrete Slab ◽  
Structural Elements ◽  
Reinforced Concrete Slab

scholarly journals TENDENCY IN STRUCTURAL ELEMENTS OF BUILDINGS FOCUSED ON REINFORCED CONCRETE SLAB WITHOUT BEAMS

2019 ◽  
Vol 25 (61) ◽  
pp. 1051-1056
Author(s):  
Nagayoshi SOU ◽  
Yoshihisa NAKATA ◽  
Kazuki TAJIMA ◽  
Atsunori MIYATA ◽  
Takumi ARAMAKI ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Concrete Slab ◽  
Structural Elements ◽  
Reinforced Concrete Slab

scholarly journals Effect of Successive Impact Loads From a Drop Weight on a Reinforced Concrete Flat Slab

2019 ◽  
Vol 281 ◽  
pp. 02003 ◽  
Author(s):  
Ali Jahami ◽  
Yehya Temsah ◽  
Ossama Baalbaki ◽  
Mohamad Darwiche ◽  
Youmn Al-Rawi ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Impact Load ◽  
Concrete Slab ◽  
Residential Buildings ◽  
Structural Elements ◽  
Dynamic Impact ◽  
Rock Falls ◽  
Reinforced Concrete Slab ◽  
Flat Slabs ◽  
Different Types

Lebanon is one of the countries which are at high risk of experiencing rock falls. In order to ensure public safety, engineers must take into consideration this risk. In the past years, numerous researches were conducted on the behavior of horizontal structural elements, slabs, of different types under dynamic impact load. Reinforced concrete flat slabs are commonly used slabs in residential buildings. To build a profound understanding of the structural behavior of the slabs under such loadings, it is important to investigate the effect of energy dissipation on the equivalent impact force, mid-span deflection and damage pattern. In this study a sample reinforced concrete slab of 500 x 1000 x 100 mm dimensions is considered. The aim of this paper is to find how these factors vary with the increase in energy as the drop load resembling the real rock fall is left to drop freely from different heights 0.6 m and 1 m.

scholarly journals A review on the performance of reinforced concrete structures under blast loading

2020 ◽  
Vol 3 (4) ◽  
pp. 216-228
Author(s):  
K. Senthil ◽  
Iwansh Gupta ◽  
S. Rupali ◽  
Loizos Pelecanos
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beam ◽  
Concrete Slab ◽  
Concrete Columns ◽  
Reinforced Concrete Beam ◽  
Structural Behavior ◽  
Charge Weight ◽  
Structural Elements ◽  
Reinforced Concrete Slab ◽  
Reinforced Concrete Columns

An explosion on the elevated structures caused by terrorist activities or manmade events can induce significant deformations in the Civil Engineering structures. Therefore, it is necessary to review the response of the structural behavior such as reinforced concrete slab, reinforced concrete beams, and columns. On the basis of this objective, a detailed literature review is conducted to understand the scope for protecting such structures and the structural behavior under blast loading. Based on the detailed literature survey, the investigations about the behavior of conventional reinforced concrete columns and slab initiated in 2005 however, the behavior of reinforced concrete beam was focused since the year 2010. Also, the literature reveals that the investigations on structural elements using analytical techniques are limited in comparison to experiments and simulations. In addition to that, the response of the structural elements was predicted and the trend was calibrated and fitted logarithmically with the experimental results. The predicted spall diameter in the reinforced concrete slab is 0.95 m corresponding charge weight of 100 kg however the influence of spalling was found to be negligible after the 100 kg of charge weight. The predicted spall length in the reinforced concrete beam is 1.6 m corresponding charge weight of 100 kg and the effect may be negligible after 100 kg of charge weight. The predicted deflection in the reinforced concrete columns is 30 mm corresponding to a peak reflected impulse of 1000 MPa-ms, whereas the deflection was found to be negligible after the 1000 MPa-ms of peak reflected impulse.

Dimension and Frequency Profiles of Concrete Highway Bridges in New Madrid Region of Southeastern Missouri

1997 ◽  
Vol 1594 (1) ◽  
pp. 84-93 ◽  
Author(s):  
Ralph Alan Dusseau
Keyword(s):  
Reinforced Concrete ◽  
Concrete Slab ◽  
Highway Bridges ◽  
Ambient Vibration ◽  
Earthquake Hazards ◽  
Empirical Formulas ◽  
Reinforced Concrete Slab ◽  
Box Girder ◽  
Bridge Spans ◽  
New Madrid

The results of a study funded by the U.S. Geological Survey as part of the National Earthquake Hazards Reduction Program are presented. The first objective of this study was the development of a database for all 211 highway bridges along I-55 in the New Madrid region of southeastern Missouri. Profiles for five key dimension parameters (which are stored in the database) were developed, and the results for concrete highway bridges are presented. The second objective was to perform field ambient vibration analyses on 25 typical highway bridge spans along the I-55 corridor to determine the fundamental vertical and lateral frequencies of the bridge spans measured. These 25 spans included six reinforced concrete slab spans and two reinforced concrete box-girder spans. The third objective was to use these bridge frequency results in conjunction with the dimension parameters stored in the database to develop empirical formulas for estimating bridge fundamental natural frequencies. These formulas were applied to all 211 Interstate highway bridges in southeastern Missouri. Profiles for both fundamental vertical and lateral frequencies were then developed, and the results for concrete highway bridges are presented.

An Assessment of the Long-Term Durability of Concrete in Radioactive Waste Repositories

1985 ◽  
Vol 50 ◽  
Author(s):  
A. Atkinson ◽  
D. J. Goult ◽  
J. A. Hearne
Keyword(s):  
Reinforced Concrete ◽  
Radioactive Waste ◽  
Concrete Slab ◽  
Laboratory Studies ◽  
Preliminary Assessment ◽  
Reinforced Concrete Slab ◽  
Radioactive Waste Repositories ◽  
Waste Repositories ◽  
Durability Of Concrete

AbstractA preliminary assessment of the long-term durability of concrete in a repository sited in clay is presented. The assessment is based on recorded experience of concrete structures and both field and laboratory studies. It is also supported by results of the examination of a concrete sample which had been buried in clay for 43 years.The enoineering lifetime of a 1 m thick reinforced concrete slab, with one face in contact with clay, and the way in which pH in the repository as a whole is likely to vary with time have both been estimated from available data. The estimates indicate that engineering lifetimes of about 103 years are expected (providing that sulphate resisting cement is used) and that pH is likely to remain above 10.5 for about 106 years.

Computer Nonlinear Analysis of the Formation and Development of Cracks in a Reinforced Concrete Slab Loaded by a Planar Uniform Load

2014 ◽  
Vol 606 ◽  
pp. 229-232 ◽  
Author(s):  
Petr Tej ◽  
Vítězslav Vacek ◽  
Jiří Kolísko ◽  
Jindřich Čech
Keyword(s):  
Reinforced Concrete ◽  
Ground Water ◽  
Nonlinear Analysis ◽  
Concrete Slab ◽  
Lower Surface ◽  
Uniform Load ◽  
Reinforced Concrete Slab

The paper focuses on a computer nonlinear analysis of the formation and development of cracks in a concrete slab exposed to a uniform continuous load on the lower surface. The analysis is based on an actual example of the formation and development of cracks in a basement slab exposed to ground water buoyancy.

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