1
FLEXURE AND AXIAL LOADS
IN REINFORCED CONCRETE
1 Introduction
Interaction of flexure and shear
Engineers usually treat them as independent.
In steel I-beams, that is a good assumption (M in flanges, V in web).
In RC, they influence each other to some ex
CEE 511
Homework 4
Autumn 2010
Due 27 October 2010.
A building is located in a moderate seismic zone. It is square, with four bays in each
direction, and 20 stories high. The bay size is 18 c/c of columns and the story height is
12 ft. The beams are 21 x
STRUT & TIE MODELING
1 Introduction
1.1 Potatoes, St Venant, and Structural Design
Idaho is famous for potatoes. Suppose that the City of Idaho had commissioned you to
design a celebratory statue of a potato that was 1000 times life size, and solid. The w
CONCRETE
1
Concrete under Uniaxial Load
1.1
Compression
1.1.1
Behavior
Low loads:
(fc 0.30 f'c)
No mechanical cracking. Shrinkage cracks only. Linear
High service loads: (0.30f'c fc 0.50 f'c)
Bond cracks. Paste starts to separate locally from aggregate.
1
SHEAR IN REINFORCED CONCRETE
1
Introduction.
Shear is the most complicated and least well-understood aspect of design in reinforced concrete.
This view is supported by the complexity and lack of integration of Chapter 11 (Shear and
Torsion) in ACI 318.
TORSION IN REINFORCED CONCRETE
1 Introduction
1.1 St Venant and Restraint of Warping Torsion.
Behavior and analysis of torsion in reinforced
concrete follow lines analogous to the
developments for shear.
We usually distinguish between two types of
torsion
DESIGN PHILOSOPHIES
1
Introduction.
Much of structural design centers around the process of making sure that the structure is
strong enough and stiff enough to fulfill its purpose. However, strong enough is not a
unique definition, and different approache
CEE 220
Torsion
1 INTRODUCTION
A body is subjected to torsion when the two moment vectors that load it are collinear.
Often, members that carry torsion are also prismatic. This means that they have a
longitudinal axis and that the cross-section properties
Deep beam. A transfer girder is to carry two 24 in. square columns, each with factored loads
of 1200 kips located at the third points of its 36 ft span, as shown in Fig. 10.14a. The beam has
a thickness of 2 ft and a total height of 12 ft. Design the beam
BUCKLING OF REINFORCING BARS IN
CIRCULAR RC COLUMNS UNDER CYCLIC
LATERAL LOAD
John F. Stanton
(Professor, University of Washington)
and
Wayne A. Brown
(Designer, Degenkolb Engineers)
FOREWORD
The PRESSS project on precast concrete, on which I came to know
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CONFINEMENT MODEL FOR HIGH-STRENGTH CONCRETE
By Salim Razvi1 and Murat Saatcioglu,2 Member, ASCE
ABSTRACT: A mathematical model is developed to express the stress-strain relationship of hi
MOMENT REDISTRIBUTION IN STATICALLY INDETERMINATE MEMBERS
1 What is it?
Moment redistribution in statically indeterminate flexural members is the process of designing each
section for a moment that differs slightly from the elastic one. The redistribution
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EFFECTS OF SHRINKAGE AND TEMPERATURE
1 Background
Environmental strains, such as thermal and shrinkage, cause deformations and stresses in
flexural members. The deformations and stresses may be purely axial (if the member
geometry and the environmental st
CEE 511
Homework 6
Autumn 2010
Due 10 November 2010.
1. In this question you will compare the ACI empirical equation for creep deflection
with a more precise calculation.
Consider a rectangular beam with dimensions b, h d and d. The tension and
compressio
CEE 511
Homework 5
Autumn 2010
Due 2010.11.03
1. MMFX steel has a stress-strain relationship that can be characterized by a Menegotto-Pinto curve, with
parameters E0= 30,000 ksi, f0 = 160 ksi, b = 0.01 and R = 1. However, its high strength makes it more
p