What is the key purpose of a roof?

Slides:

Advertisements

Similar presentations

Muscle Biomechanics.

Advertisements

Physics of Bridges Mr. Hoa STEM 2014.

Equilibrium and Elasticity

Civil Engineering Science Concepts. Forces Static forces act on objects at rest. Compression forces shorten objects. These forces push structures. Tension.

Structural Components

 Key Learning ◦ Various shaped objects offer different strengths.  Unit Essential Question ◦ Why is it important to know the strengths of various shaped.

Bridge Lauren Caine and Loren Short. My Bridge Broke My bridge broke in the middle bottom. The bottom just fell out. My Bridge Broke there because that.

Shear - Tensile - Compression Stresses Slip Ted 126 Spring 2007.

Cables. Principal Elements for practical suspension systems Vertical supports or towers Main cables Anchorages Stabilizers.

Tension Elastic Force Gravity Normal Force Friction Drag.

ENGR 20 Statics Raymond Great Hall Ceiling Trusses Stephen Morse Steven Granados.

A multi-force member is generally subjected to internal _____.

Your Challenge…   Build the tallest tower you can that can support a textbook!

Fasteners, Load and Stress. Loads Load is an engineering term for the forces that are exerted on a structure. Loads are considered either static or dynamic:

Examining Forces on Bridges.  At any given time, two main forces act upon a bridge: compression and tension.  It is the job of engineers to design bridges.

-Beam -Truss -Arch -Suspension -Cable Stayed

There are many types of bridges including:

Chapter 6 Designing Structural Systems. Terminology Structure – a body that will resist external forces without changing its shape, except for that due.

Tension and Compression. Compression This pressure is like a squeeze or a push. Think of the books on the 3 little houses.

Structures. Defining a structure… A structure usually refers to any large, man-made object permanently fixed to Earth's surface, as a result of construction.

 Part One: Material Properties  Part Two: Forces and Torque  Assessment.

STRUCTURE By Simonnett Rosenberg Gabriela Di Lorenzo.

Roofs By Denis Gifford.

1 STRESS There are 4 main types of stress: Tension Compression Bending Torsion Tension When an object is being stretched it is said to be under tension,

ELASTICITY. Elasticity  Elasticity is a branch of Solid mechanics that deals with the elastic behavior of solids. It is the property of material of a.

Torque and Equilibrium Practice

Chapter 12 Equilibrium and elasticity. Equilibrium We already introduced the concept of equilibrium in Chapter 8: dU(x)/dx = 0 More general definition.

Forces and Loads.

Forces Engineering Science S4. Forces There are a number of different forces which act on objects all around us An example of some forces are: Static.

Bridges Introduction to design.

Structural Engineering

 Gravitational force – always present between two objects that have mass. Usually not felt unless one of the objects is very large. On earth 9.81 m/s.

STRUCTURAL MEMBERS by Jaime R. Rico.

Available at: Lesson 2.1, Construct a Truss Tower Construct a Truss Tower Graphic retrieved from, photos.org/Paris/Eiffel_Tow.

Forces on Bridges How are bridges designed to withstand the forces that act on them?

BFC (Mechanics of Materials) Chapter 7: Statically Determinate Plane Trusses Shahrul Niza Mokhatar

Civil Engineering Science Concepts. Forces Static forces act on objects at rest. Compression forces shorten objects. These forces push structures. Tension.

WHAT IS A STRUCTURE? A structure is something that will support an object or a load. A structure must be strong enough to support its own weight and whatever.

Structures What things do I need to find out in order to predict if what I design will stand up to the use I intend to put it through?

Bridges bridge, span a structure that allows people or vehicles to cross an obstacle such as a river or canal or railway etc.span physics, the physical.

Structural Elements.

I’m reading a great book on anti-gravity. I can’t put it down.

Bridges Mr. Ruddle.

Troop 8 Truss Presentation. What are Trusses? A truss is a type of framework, usually comprising straight struts and ties, which is designed to be stiff.

Bridge Structures.

Deform - What it means to change shape.

Week 3: Structures Plan for Giant Trampoline Bridge in Paris.

Free Body Diagram of Cable-Pulley System

The Structures in our Lives

Motion and Force. Motion and Force Chapter Four: Forces 4.1 Forces 4.2 Friction 4.3 Forces and Equilibrium.

Structures What do we understand when we talk about structures in Design and technology?

Forces: Equilibrium Examples

2. Compression and Tension

The Longest Bridges in the World...

Jeopardy types of bridges Stresses Factors Bridge shapes

STRAW TOWER SUMMARY/EVALUATION NOTES LESSON

Suspension Bridges.

Building Frame (Column & Beam)

Building Construction I

FORCES AND STRUCTURES Force - the influence that tends to change the speed and direction of a stationary or a moving body. External Forces Internal Forces.

Equilibrium Of a Rigid Body.

Topic 4 – Forces, Loads and Stresses

Construction: Building and Beams

Forces Internal and External.

Motion and Force. Motion and Force Chapter Four: Forces 4.1 Forces 4.2 Friction 4.3 Forces and Equilibrium.

Motion and Force. Motion and Force Chapter Four: Forces 4.1 Forces 4.2 Friction 4.3 Forces and Equilibrium.

The Basics of FORCES.

Suspension Bridges Suspension Bridges Efficient Structure b/c:

Presentation transcript:

What is the key purpose of a roof?

Why are there so many different styles of roof?

Tensile and Compression Force Tension The rope is under tension as the two people pull on it. This stretching puts the rope under tension. Compression Weightlifters find that their body is compressed by the weights they are holding above their head.

Basic structural elements All structures have forces acting on them. The part of the structure that has a tensile force acting on it is called a TIE. The part that has a compressive force acting on it is called a STRUT.

Roof design The roof beams are under pressure from the weight of the tiles on the roof (compressive force). The ceiling beam is being stretched (tensile force).

Tension or compression? Identify which members are in tension or compression http://commons.wikimedia.org/wiki/File:Ironbridge002.JPG

Tension or compression? Identify which members are in tension or compression http://benjaminwey2000.files.wordpress.com/2008/01/calatrava.jpeg

Tension or compression? Identify which members are in tension or compression http://www.unm.edu/~fll/eiffel-tower-day.jpg

Tension or compression? Identify which members are in tension or compression http://www.fosterandpartners.com/content/projects/0300/4740.jpg