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shankarciv SEFI Member
Joined: 26 Jan 2003 Posts: 4
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Posted: Sun Nov 12, 2006 6:39 am Post subject: Very Fundamental Question |
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Hello:
A hinged support is one which gives reaction in both horizontal and vertical direction?That means at the location we have the hinged support there is no vertical translation nor any horizontal translation.Right?
But, the members of a truss are assumed to be connected by frictionless hinges.Right?But, there the hinge can translate vertically or horizontally.Right?But, this is contradictory to the assumption in case of a hinged support as mentioned above???Why?? Please help!!
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mkalgal Silver Sponsor
Joined: 26 Jan 2003 Posts: 54
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Posted: Mon Nov 13, 2006 4:46 am Post subject: Very Fundamental Question |
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Dear Shankar, This has reference to your query on hinged support and hinged joint of a truss. One is a hinge which is supported and the other is not supported. Since the hinge at a support is "fixed" to the support, it would not allow any translation. At a "roller-hinge" end also we have a hinge but it will allow translation in one direction isn't it? Regards Kalgal
On Sun Nov 12 12:09:53 2006, shankarciv[AT]red... <shankarciv[AT]red...> wrote:
Quote: | Hello:
A hinged support is one which gives reaction in both horizontal and vertical direction?That means at the location we have the hinged support there is no vertical translation nor any horizontal translation.Right?
But, the members of a truss are assumed to be connected by frictionless hinges.Right?But, there the hinge can translate vertically or horizontally.Right?But, this is contradictory to the assumption in case of a hinged support as mentioned above???Why?? Please help!!
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anurag.sinha ...
Joined: 26 Jan 2003 Posts: 53
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Posted: Mon Nov 13, 2006 5:30 am Post subject: Very Fundamental Question |
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The answer is also "Very Fundamental"
But the support can also sink and sway at the same time. Right? Nothing is rigid, even the earth and the solar system is in motion.
shankarciv[AT]red... wrote:
Quote: | Hello:
A hinged support is one which gives reaction in both horizontal and vertical direction?That means at the location we have the hinged support there is no vertical translation nor any horizontal translation.Right?
But, the members of a truss are assumed to be connected by frictionless hinges.Right?But, there the hinge can translate vertically or horizontally.Right?But, this is contradictory to the assumption in case of a hinged support as mentioned above???Why?? Please help!!
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dbhanuprasad SEFI Regulars
Joined: 26 Jan 2003 Posts: 23
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Posted: Mon Nov 13, 2006 3:17 pm Post subject: Very Fundamental Question |
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The support is assumed to be rigid and hence the support displacements are assumed as zero. If the support is not rigid and it sinks or sways the magnitude of the sinking/swaying shall be considered in the analysis of structure. The structure becomes indeterminate and normally such structures are analysed using structural analysis softwares.
The effect of earth or solar system moving is negligible on the building structures both from the size and loads (which are due to gravity) consideration.
On Mon Nov 13 11:00:40 2006, anurag.sinha[AT]eil... <anurag.sinha[AT]eil...> wrote:
Quote: | The answer is also "Very Fundamental"
But the support can also sink and sway at the same time. Right? Nothing is rigid, even the earth and the solar system is in motion.
shankarciv[AT]red... wrote: Hello:
A hinged support is one which gives reaction in both horizontal and vertical direction?That means at the location we have the hinged support there is no vertical translation nor any horizontal translation.Right?
But, the members of a truss are assumed to be connected by frictionless hinges.Right?But, there the hinge can translate vertically or horizontally.Right?But, this is contradictory to the assumption in case of a hinged support as mentioned above???Why?? Please help!!
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