Lliterature Review for master of structure engineering

7/29/2019 Lliterature Review for master of structure engineering

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DYNAMIC ANALYSIS OF

REINFORCED CONCRETEBEAM WITH WEB OPENINGS

GUIDED BY:-

Prof. P.G.Patel

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PRESENTED BY:-

NILESH H. SAKSENAEN. NO. 110280715004

SUBJECT AREA:-ANALYSIS, DESIGN, FEM


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INTRODUCTION In the construction of modern buildings, a network of

pipes and ducts is necessary to accommodate essentialservices like water supply, sewage, air-conditioning,

electricity, telephone, and computer network.

Usually, these pipes and ducts are placed underneath thebeam soffit and, for aesthetic reasons, are covered by a

suspended ceiling, thus creating a dead space.

Passing these ducts through transverse openings in thefloor beams leads to a reduction in the dead space andresults in a more compact design.

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INTRODUCTION

For small buildings, the savings thus achieved may not be

significant, but for multistory buildings, any saving in story height

multiplied by the number of stories can represent a substantial

saving in total height, length of air-conditioning and electricalducts, plumbing risers, walls and partition surfaces, and overall

load on the foundation.

However provisions of openings in web of the beam increase thestress concentration around the openings and change the simple

behavior of the beam into very complex behavior.3


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LITERATURE STUDY

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PAPER :1

TITLE:Investigation of the Opening Effects onthe Behavior of Concrete Beams Without

Additional Reinforcement in Opening Region

Using Fem Method.

AUTHOR:Soroush Amiri, Reza Masoudnia.

JOURNAL:Australian Journal of Basic and

Applied Sciences.

YEAR:2011.


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In this study they simulate the simply supported concrete beams

consisting of circular openings with varying diameters using

ANSYS 10.

All beams had an identical cross section of 100 mm 250

mm and 2000 mm in length with the circular opening inseven diameters: 150 mm, 130 mm, 120 mm, 110 mm, 100

mm, 80 mm and 60 mm.

The beams were simulated to obtain the load-deflection

behavior.


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VERIFICATION STUDY:

They modeled two beams one without opening and other with

rectangular openings using ANSY10.

The beam already tested experimentally by Abdalla etal. (2003).

The dimensions of the full-size beams were 100 mm 2050

mm250 mm. The span between the two supports was 2000

mm. Longitudinal reinforcements and shear stirrups are modeled

throughout the beam.

The goal of the comparison of the FE model and the beam fromAbdalla (2003) is to ensure that the simulation process is

correct.


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The first beam was RC solid beam without opening that the ultimate load obtained

from the experimental test was 83,000N, while the ultimate load extracted from

ANSYS analysis outputs is 77,925N. Therefore, the difference is about 6% and it

was proven that ANSYS software is an appropriate method to predict the behavior

of RC beams.


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The second beam was RC beam with rectangular opening (height of the opening

= 100 mm and width of the opening = 300mm). The ultimate load obtained from

the experimental test was 41,000N, whilst the ultimate load attained from

ANSYS analysis outputs is 47,582N. Therefore, the difference is about 16% and

it was acceptable.


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EFFECTS OF CIRCULAR OPENING SIZES WITH

VARYING DIAMETERS:

LOAD VD DEFLECTION CURVE FOR DIFFERENT MODELS


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RESULTS FROM THE LOAD VS DEFLECTION CURVE:


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CONCLUSION:

The results obtained from this study showed that the

performance of the beams with circular openings with diameterless than 0.48D (D is depth of the beam web) has no effect on

the ultimate load capacity of the RC rectangular section beams.

Introducing the circular opening with diameter more than

0.48D reduces the ultimate load capacity of the RC rectangular

section beams at least 26%.


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PAPER:2

TITLE:The Study of the Effects of Web Openings on theConcrete Beams.

AUTHOR:Soroush Amiri, Reza Masoudnia and Ali Akbar

Pabarja

JOURNAL:Australian Journal of Basic and Applied Sciences

YEAR:2011.


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ABSTRACT:

This paper aims to review the results of previous research

studies on precast and prestressed beams, T-beams, deep

beams, and rectangular concrete beams with web openings.

The behavior of both reinforced concrete beams with

rectangular and circular openings and precast beams withrectangular and circular openings was investigated.

The effects of the size and location of the openings on the

behavior of such beams are examined and the strengths ofthese openings are explored as well.


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PAPER:3

TITLE:DESIGN OF REINFORCED CONCRETE BEAMS

WITH WEB OPENINGS.

AUTHOR:M.A. Mansur.

JOURNAL:The 6th Asia-Pacific Structural Engineering andConstruction Conference (APSEC 2006).

YEAR:2006.


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ABSTACT:

In this paper, major findings relevant to the analysis and design

of such beams under the most commonly encountered loadingcase of bending and shear are extracted and summarized.

BEAMS WITH SMALL OPENINGS:

Openings may be considered as small openings if depth (or

diameter) of the opening is less than 40% of the overall beam

depth.

BEAMS WITH LARGE OPENINGS:

Openings having depth more than 40% of overall depth are

considered as large openings.


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REINFORCEMENT DETAILS:

REINFORCEMENT DETAILS FOR BEAM WITH SMALL

CIRCULAR OPENING.


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18REINFORCMENT DETAILS FOR BEAM WITH LARGE

OPENING.

REINFORCEMENT DETAILS:


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PAPER:4

TITLE: A review of design specifications of opening in the webfor simply supported RC beams.

AUTHOR: Soroush Amiri*, Reza Masoudnia and Mohammad

Amin Ameri.

JOURNAL: Journal of Civil Engineering and Construction

Technology.

YEAR: April 2011.


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FACILITATION OF SELECTING THE SIZE AND

LOCATION OF THE WEB OPENINGS:


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CONCLUSIONS:

In this paper they gives the details for the location of the

openings in the beam.

More evaluation of behavior for concrete beam with webopenings is needed to gain more efficient and reasonable

methods for designing and construction.


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OBJECTIVES OF THE RESEARCH

To determine the effects of the size and location of the

openings on the behaviour of the beam.

Dynamic analysis of the beam with openings using finite

element analysis in ANSYS 14.

Interpretation of the result obtained by software analysisand its comparison with experimental result.

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MODELOFBEAMCREATEDINANSYS 14 WORKBENCH:

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WORK SCHEDULE

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Sr.

No.

Month Work to be done

1 August-2012 Topic selection and literature collection

2 September-2012 Review of literature

3 October-2012 Learning software ANSYS

4 November-2012 Learning software ANSYS

5 December-2012 Application of the software to the modeling

6 Jauary-2013 Modeling of the beam using appropriate software

7 February-2013 Analysis of the model

8 March-2013 Interpretation of the result

9 April-2013 Reporting

10 May-2013 Submission

11 June-2013 Defense


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Documents

Lliterature Review for master of structure engineering