Download to read offline
Uploaded byKhizar Sandhou
Bridges
This document provides information about different types of bridges. It discusses beam bridges, cantilever bridges, arch bridges, suspension bridges, cable-stayed bridges, and truss bridges. For each type, it describes the basic design and how forces are distributed. The document also gives a brief history of bridge development from ancient clapper bridges to modern prestressed concrete and steel designs.
More Related Content
Bridges
- 1. PRESENTED BY ; Khizarali PRESENTED TO ; Sir Talha 42716
- 2. TABLE OF CONTENTS •WHATIS A BRIDGE.? •DIFFERENT TYPES OF BRIDGES. •PART OF BRIDGE . •HISTORY WORKING.
- 3. BRIDGE • BRIDGE ISA STRUCTURE BUILT TO SPAN A VALLEY, ROAD, RIVER, BODY OF WATER, OR ANY OTHER PHYSICAL OBSTACLE. • DESIGNS OF BRIDGES WILL DEPENDING ON THE FUNCTION OF THE BRIDGE AND THE NATURE OF THE AREA WHERE THE BRIDGE IS TO BE CONSTRUCTED.
- 4. Asia 1,304 years ago Romans 2,104 yearsago Clapper Bridge Tree trunk Stone Arch design evenly distributes stresses Natural concrete made from mud and straw Roman Arch Bridge History of Bridge Development Great Stone Bridge in China Low bridge Shallow arch Allows boats and water to pass through
- 5. History of BridgeDevelopment Truss Bridges Mechanics of Design Wood Suspension Bridges Use of steel in suspending cables 1900 1920 Prestressed Concrete Steel 2000
- 6. TYPES OF BRIDGES THEREARE SIX MAIN TYPES OF BRIDGES: 1. BEAM BRIDGES 2. CANTILEVER BRIDGES 3. ARCH BRIDGES 4. SUSPENSION BRIDGES 5. CABLE-STAYED BRIDGES AND 6. TRUSS BRIDGES
- 7. BEAM BRIDGES CONSISTS OFA HORIZONTAL BEAM SUPPORTED AT EACH END BY PIERS. THE WEIGHT OF THE BEAM PUSHES STRAIGHT DOWN ON THE PIERS. THE FARTHER APART ITS PIERS, THE WEAKER THE BEAM BECOMES. THIS IS WHY BEAM BRIDGES RARELY SPAN MORE THAN 250 FEET.
- 8. BEAM BRIDGE •FORCES WHEN SOMETHINGPUSHES DOWN ON THE BEAM, THE BEAM BENDS. ITS TOP EDGE IS PUSHED TOGETHER, AND ITS BOTTOM EDGE IS PULLED APART.
- 10. CANTILEVER BRIDGES • ACANTILEVER BRIDGE IS A BRIDGE BUILT USING CANTILEVERS: STRUCTURES THAT PROJECT HORIZONTALLY INTO SPACE, SUPPORTED ON ONLY ONE END.
- 11. ARCH BRIDGES • THEARCH HAS GREAT NATURAL STRENGTH. THOUSANDS OF YEARS AGO, ROMANS BUILT ARCHES OUT OF STONE. TODAY, MOST ARCH BRIDGES ARE MADE OF STEEL OR CONCRETE, AND THEY CAN SPAN UP TO 800 FEET.
- 12. Forces The arch issqueezed together, and this squeezing force is carried outward along the curve to the supports at each end. The supports, called abutments, push back on the arch and prevent the ends of the arch from spreading apart. Types of Bridges Arch Bridges
- 14. Suspension Bridges This kindof bridges can span 2,000 to 7,000 feet -- way farther than any other type of bridge! Most suspension bridges have a truss system beneath the roadway to resist bending and twisting. Types of Bridges
- 15. Forces In all suspensionbridges, the roadway hangs from massive steel cables, which are draped over two towers and secured into solid concrete blocks, called anchorages, on both ends of the bridge. The cars push down on the roadway, but because the roadway is suspended, the cables transfer the load into compression in the two towers. The two towers support most of the bridge's weight. Types of BridgesSuspension Bridges
- 18. CABLE-STAYED BRIDGES The cablestayed bridge is newer than the other types of bridge. Large upright steel supports are used to transmit the load into the ground.
- 20. Truss Bridge All beamsin a truss bridge are straight. Trusses are comprised of many small beams that together can support a large amount of weight and span great distances.
- 22.