# New School of Architecture Compressive Stress in Concrete Footing Questions

Anonymous

### Question Description

Problem#1

A W12x87 Steel Column, 14'tall is subjected to a load of 215 kips The cross sectional area of the column is A = 25.6 in^2

A- What is the compressive stress in the column?

B- Whet is the bearing stress between the steel base plate and the concrete footing?

C- Whet is the bearing stress between the concrete footing and the soil?

Problem #2
A- FIND THE FORCE IN MEMBER AC AND THE FORCE IN MEMBER BC (hint, the system above is statically determinant) B- FIND THE STRESSES IN MEMBER AC AND MEMBER BC.

C-WHAT IS THE STRAIN IN MEMBER AC? D- WHAT IS THE CHANGE IN LENGTH (IN INCHES) OF MEMBER AC AFTER ALDING THE LOAD (AND DOES IT STRETCH OUT CR COMPRESS?) - (ELONGATES, SHORTENS CIRCLE 1)

Problem #3

A 10,000 LB LOAD IS SUPPORTED BY A ONE INCH-DIAMETER STEEL ROD (E = 29,000 KSI) AS SHOWN ABOVE.

A. WHAT IS THE STRESS IN THE ROD?

B. WHAT IS THE STRAIN IN THE ROD?

C. HOW MUCH DOES THE ROD ELONGATE?

Problem #4

A- Find this Maximum Shear stress () in the Wood Beam above.

B- Circle which of the following is true(circle1)

C- If the maximum allowable shear stress is only 120 psd, does the saction have adequate strength?

### Unformatted Attachment Preview

brianreyes958
School: Cornell University

Hello, kindly find the attached answer, both a PDF version amd word document version. Leave a good review. Thank you

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Date:

Problem#1
A W12x87 Steel Column, 14'tall is subjected to a load of 215 kips The cross sectional area of the
column is A = 25.6 in^2
A- What is the compressive stress in the column?
πππππππππππ ππππππ =

πππππ πππππππ
ππππ
=
= π. πππ
π
ππππ
ππ. π ππ
πππ

B- What is the bearing stress between the steel base plate and the concrete footing?
π€πππππ ππ πππ ππππππ = ππ β ππ = ππππ ππ = π. πππ ππππ
πππππ ππππππ ππ πππ ππππ πππππ = πππ + π, πππ = πππ. πππ ππππ
πππππππ ππππππ =

πππππ πππ. πππ
ππππ
=
= π. πππ π
ππππ
ππ β ππ
ππ

C- What is the bearing stress between the concrete footing and the soil?
ππππ ππ ππππππππ ππππππππ = ππππππ β πππππππ
= (π β π)πππ β ππππ β

πππ
β πππ πππ = ππππππ = π. πππππππ
ππππ

πππππ ππππππ ππ πππ ππππ πππππ = πππ + π, πππ + π. πππ = πππ. πππ ππππ

πππππππ ππππππ ππ ππππππππ πππππππ =

πππππ πππ. πππ ππππ
ππππ
=
= π. πππ π
π
(π β π)ππ
ππππ
ππ

Problem #2
A- FIND THE FORCE IN MEMBER AC AND THE FORCE IN MEMBER BC (hint, the system above
is statically determinant)

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