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My presentation is about support systems...I tried my best to make a informative presentation
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DEPARTMENT OF CIVIL ENGINEERING
AHSANULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY
.
Course N0 : CE 416Course Title: Prestress Concrete
Design SessionalCourse Teacher: Munsi Galib
Muktadir Sabreena Nasrin
.
Md. Zahidul Islam10.01.03.0024th year 2nd Semester
SUPPORT SYSTEMS Support systems
•Every Structure must have some supports•Restricts free motion of body•Provides stability•Resists or transfers load through a structural system
Support Types
Structures are either partly or completely restrained provided by supports that connect the structure to some stationary body.
There are mainly three types of support:
HingedRollerFixed
Hinged/Pinned Support
Pinned support supplies a reactive force in both vertical and horizontal direction
Doesn’t resist momentAllows rotation but not translationSingle pin support is not sufficient enough to
stable the structureUnknown magnitudes are represented by Rx
and Ry.
Fig: Hinged Bridges
.
Hinged Reactions
Roller Support
Roller support supplies a reactive force which acts in a known direction but magnitude is unknown.
Free to rotate and translate along the surfaceCan’t resist momentResulting reaction force is always a single
forceIt can’t provide resistance lateral forcesBuilding structure must have some other type
of supportReaction force is represented by Ry
Fig : Roller Support
Fixed Support
Fixed support encases the member so that rotation and translation is resisted
It can resist horizontal and vertical forces as well as moment
Fixed support stable structures.The forces and moment is expressed by
Rx,Ry,M
.
Fixed Support Reactions
Other types
Simple supportLink support
Simple Support
Quite similar to roller supportSingle force is acted perpendicular from the
surfaceUsed in long bridges and roof span
Fig : Simple Support
Link Support
Thank YouThank You