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WORLD UNIVERSITY

o f B a n g l a d e s h

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welcome to our presentation

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Project Report on…………….

ANALYSIS OF SHEAR WALL

DUE TO

LATERAL LOAD

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Supervisor:

Ahmed Shiblee NomanAsst. ProfessorDept. of Civil EngineeringWorld University of Bangladesh

Project Work Done By:

MD. ABDUL BATEN MD. ABUL KASHEM MD. ZAHIRUL HOQUE RANZU AHMED & MD. MASUD RANA

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Introduction:

High rise building is a structure vertically cantilevered from the ground level subjected to axial loading and lateral forces.

Lateral forces generated either due to wind blowing against the building or due to the inertia forces induced by ground shaking.

For building taller than ten stories, frame action obtain by the interaction of slabs and columns is not adequate to give the required lateral stiffness.

However it can be improved by statically placing shear walls as it very effective in maintaining the stability of tall buildings under severe wind or earthquake loading.

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ABSTRACT

The purpose of this study is to model and analyze the non planar shear wall assemblies of shear wall-frame structures.

These models are based on conventional wide column analogy.

For modeling closed section shear walls, in addition to this the torsional stiffness of the wide columns are adjusted by using a series of equations.

Shear wall systems having different shapes of wall-frame & Flat Plate shear wall assemblies are analyzed by static lateral load

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Objectives:

To carry out a frame analysis on shear wall models using ETABS non linear version 8.5 software.

To check the reliability of frame analysis method compare to wall frame shear wall and flat plate shear wall.

The study is focused on the determination of the ultimate lateral load due to wind and earthquake.

To find out and compare the different calculated value of those wall frame and flat plate shear wall structures.

To draw few recommendations based on the study.

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Scope of the Study :

The main intention of the research work presented in this thesis is to study the majority of the high rise building structures in Bangladesh have shear wall-frame systems.

The study is to model and analyze shear wall-frame structures having non-planar shear walls.

Proper analysis and design of building structures that are subjected to static and dynamic loads is obtaining acceptable accuracy in the results.

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Shear wall system:

Shear walls have been the most common lateral force resisting

elements for tall building besides frame

system.

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Monolithic shear wall can be classified as short, squat or cantilever as shown in figure according to there

height/depth ratio.

Shape of Shear Wall

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Method of Analysis of Shear wall

structures

Analysis on shear wall structures can be made in thefollowing three types of methods

Finite Element Analysis (FEA) Continuous connection method (CCM): Equivalent Frame Analysis (EFA)

This manual presents a set of simple building systems thathave been analyzed using ETABS Version 8.5 software.

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modeling of shear walls

Shear wall models in the literature can be divided into two:

1. Models developed for elastic analysis of building structures.

2. Models developed for nonlinear analysis of building structures.

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Open Section Shear Walls

It is a common assumption that due to the highin-plane stiffness of floor slabs, open sectionshear walls can be considered as thin-walled

beams of non-deformable contour

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Fig: Open Section Shear Wall

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Fig: Open Section Shear Wall

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0

5000

10000

15000

20000

25000

30000

35000

40000

EQ-X EQ-Y

Plate

Column

Axis (X, Y)

Comparative values of Base Moment due to Lateral Load

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0

200

400

600

800

1000

1200

1400

1600

WIND-X WIND-Y

Plate

Column

Axis (X, Y)

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Conclusion:

▶ Analyzed of Plate shear wall and column shear wall structures find base moment values are very closed.

▶ According to analysis of two methods that we get more accurate results in frame method as a alternate for plate element method.

▶ The frame element method is more economical and memory efficient.

▶ Frame analysis method is very simple rather than plate element method.

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Recommendation:

◊ The study is used for building structure, but it also be used in Bridge structure.

◊ We have done this method by static analysis, but dynamic analysis should also be performed.

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Special Thanks

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