Beirut Arab University-Dept. of Civil Engineering
Welcome to Reinforced Concrete RC IICVLE421
Lecture 1-Introduction
Zaher Abou Saleh, Ph.D
TEXTBOOKS
Reinforced Concrete: Mechanics and Design, 6th Edition
James G. MacGregor, James K. Wight, Prentice Hall,
FACULTY OF ENGINEERING AND ARCHITECTURE
Department of Civil & Environmental Engineering
CIVE 420- Concrete I
Fall 2009-2010
Prof. M. Harajli
Assignment II (Outcome IV- Flexural Analysis)
I.
Calculate the ultimate flexural resistance Mu of the doubly reinf
FACULTY OF ENGINEERING AND ARCHITECTURE
Department of Civil & Environmental Engineering
CIVE 420- Concrete I
Spring 2012-2013
Prof. M. Harajli
Assignment III (Outcome 5 Flexural Design)
I. Design the rectangular simply supported concrete beam shown in the
Reinforced Concrete Materials
Plain Concrete: obtained by mixing coarse aggregate, fine aggregate/sand,
cement, and water.
Proportions of Aggregate: Sand: Cement by weight = 1 : 0.4 to 0.6 : 0.3 to
0.5
The three most important characteristics of plain con
Introduction
Definition: Reinforced concrete is a combination of two complementary materials:
Plain concrete which is strong in compression but relatively weak in tension, and steel
bars embedded in concrete to provide the needed strength in tension
The m
Service Load Deflections
Deflection Control
Control of deflections in R/C is important for avoiding serviceability
problems in the structure. Examples of serviceability problems include:
(i)
Cracking of partition or infill walls,
(ii) Breaking of glass wi
Service Load Analysis and Design of Concrete
Sections/Members in Flexure
Analysis Process
Given a R/C member that was designed using Ultimate Strength Design
(USD) method, it is often necessary to evaluate the behavior (deflection,
crack widths, tension s
Ultimate Flexural Strength Analysis
of R/C Members
Computation of Nominal Flexural Strength of R/C Section/Member
Define:
b
= width of concrete section
d
= depth from top fiber in compression to
centroid of tension steel.
As
= area of tension steel bars.
Ultimate Flexural Strength Analysis:
Tension + Compression Steel (Doubly Reinforced Sections)
& Flanged Sections
Advantages of Compression Steel
Compression steel is used in R/C members to:
1. Increase ductility (very important requirement for earthquake
FACULTY OF ENGINEERING AND ARCHITECTURE
Department of Civil & Environmental Engineering
CIVE 420 - Concrete I
Fall 2011-2012
Prof. M. Harajli
Assignment I (Outcome 2 Service Load Analysis)
I.
For the section below the following is given: applied total dea
FACULTY OF ENGINEERING AND ARCHITECTURE
Department of Civil & Environmental Engineering
CIVE 420- Concrete I
Fall 2008
Prof. M. Harajli
Assignment I
I.
Calculate the ultimate flexural resistance Mu of the R/C section shown in the figure below.
Check if th
Introduction
Definition: Reinforced concrete is a combination of two complementary materials:
Plain concrete which is strong in compression but relatively weak in tension, and steel
bars embedded in concrete to provide the needed strength in tension
The m
Reinforced Concrete Materials
Plain Concrete: obtained by mixing coarse aggregate, fine aggregate/sand,
cement, and water.
Proportions of Aggregate: Sand: Cement by weight = 1 : 0.4 to 0.6 : 0.3 to
0.5
The three most important characteristics of plain con
Ultimate Flexural Strength Analysis
of R/C Members
Computation of Nominal Flexural Strength of R/C Section/Member
Define:
b
= width of concrete section
d
= depth from top fiber in compression to
centroid of tension steel.
As
= area of tension steel bars.
Service Load Analysis and Design of Concrete
Sections/Members in Flexure
Analysis Process
Given a R/C member that was designed using Ultimate Strength Design
(USD) method, it is often necessary to evaluate the behavior (deflection,
crack widths, tension s
Service Load Deflections
Deflection Control
Control of deflections in R/C is important for avoiding serviceability
problems in the structure. Examples of serviceability problems include:
(i)
Cracking of partition or infill walls,
(ii) Breaking of glass wi
Design of R/C Members/Sections for Flexure
Design Process
Given beam span length and support conditions, externally applied load (live
load, superimposed dead load, etc), it is required to estimate the size of the
beam (section height h, width b, and dept
Ultimate Flexural Strength Analysis:
Tension + Compression Steel (Doubly Reinforced Sections)
& Flanged Sections
Advantages of Compression Steel
Compression steel is used in R/C members to:
1. Increase ductility (very important requirement for earthquake
Shear Design of R/C Members
Shear failure is one of the most brittle types of failure in R/C members and
hence should be avoided through careful and adequate shear design.
Basic Principles of Mechanics
Consider a section of a beam member subjected to some
Bond and Development of Reinforcing Bars
When we design reinforced concrete members we assume perfect bond
between steel and concrete. Without this bond between these two
complementary materials, R/C members are no better than concrete
members constructed
FACULTY OF ENGINEERING AND ARCHITECTURE
Department of Civil & Environmental Engineering
CIVE 420 - Concrete I
Spring 20112012
Prof. M. Harajli
Assignment IIa (Outcome 4 Flexural Analysis)
I.
Check if the RC section below satisfies the maximum and minimum