Presentation onDrift control of RCC Building 1

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6. Presentation on
Drift control of RCC Building
Name Roll No
 Md. Saiful Islam 02
 Tahsin Raza 11
 Khaza Ahmed Palash 36
 Mofasser Uddin Ahmed 42
 Md. Ashraful Islam 43

7. Under the Supervision of
Pronob Kumar Ghosh
Lecturer
Dhaka International University

8. Structures are designed for strength (safety) and
serviceability (performance).
Serviceability issues include
• deflection,
• vibration
• corrosion
But with respect to wind the issue of concern is
story drift of structure.
Philosophy of Design for Drift

9. What is Drift?
Drift is the lateral displacement of one level of a multi-
storey structure relative to the level above or below
due to lateral loads. Lateral loads are mainly responsible
for drift.
Philosophy of Design for Drift

10. Due to lateral loads there will be a drift or sway on
the high rise structures.
The magnitude of displacement at the top of a
building relative to its base is total drift.
Shear wall is a wall composed of shear panels to
counter the gravity loads and also lateral load
performing on a structure.
Philosophy of Design for Drift

11. The main issues in our thesis is-
Modelling and Analysis to Drift Control and Wind
Loads .
Furthermore, the sub-topics address modeling
procedures /techniques, methods of analysis, wind
loading, code formulations, quantifying drift damage,
damage definitions and cases of recorded building
response.
Project Objective

12. To study the performance of column shape (with
shear wall & without shear wall) on storey drift.
 To study the effects of moment of inertia of beams
(with shear wall & without shear wall) on storey drift.
To carry out a limited parametric study to observe the
effects of different geometric column shape and
beam size on performance of the structure.
The objective of the response also
includes

13.  Chapter 1 – Introduction: In this chapter, a brief introduction of
the thesis its objectives possible outcomes.
 Chapter 2 – Literature Review: wind load and shear wall and
methodology for load analysis.
 Chapter 3 – Building modeling and analysis: In this chapter the
modeling of building are presented and analysis of that models
by ETABS v9.7.2 software.
 Chapter 4 – Parametric study: the analytical results for changing
different geometric parameter of beams and columns of the test
building.
 Chapter 5 – Conclusions and Recommendations: this chapter
summaries the findings of this research.
Thesis Organization

14.  Alexander Gustave Eiffel recognized the effects of
wind when he designed the Eiffel Tower. At 986 feet,
the Eiffel Tower was the tallest structure in the world
from 1889 until 1931, when it was surpassed by the
Empire State Building.
…….
History of Wind and Structures

15. There are three important structural failures involving
wind that deserve mention here.
Attention to wind was first brought to the forefront
of the field in 1940 when Washington State’s Tacoma
Narrows Bridge collapsed under moderate, 40 mph
winds.
……..
History of Wind and Structures

16. The second failure was the 400-foot reinforced
concrete cooling towers failure in 1965.
• Located in England, the failure of the Ferry bridge
cooling towers demonstrated the dynamic effects of
wind at a time when most designs considered wind
loading.
History of Wind and Structures

17. The third example involves Boston’s John Hancock
Tower.
• In 1973 the John Hancock tower experienced 75 mph
winds that were believed to cause over 65,000 pounds
of double plane windows to crash to the sidewalks
below.
History of Wind and Structures

18. Drift Index.
 Drift index = displacement/height
 total drift index = total drift/building height = Δ/H
 interstory drift index = interstory drift/story height= δ/h

19. Drift is controlled by varying
Beam Size
Column Size
Column Height
Position of Shear Wall
Bracing

20. In structural engineering, a shear wall is a structural
system composed of braced panels to counter the
effects of lateral load acting on a structure.
Shear Wall

21. Thank you