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subhash_mehrotra
E-Conference Resource
Joined: 16 Nov 2012
Posts: 7
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 Posted: Sat Dec 01, 2012 1:42 pmPost subject: Expansion Joints |
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Dear All,
As per clause 27.2 of IS-456:2000, the structures exceeding 45 mtr in length are to be designed with one or more expansion joints.�
Considering that below ground the effect of temperature is less, one should provide joints in basement portions at a spacing of about 90.0 mtr.� When joints are provided more than 90 mtr spacing, cracks do appear after passage of time due to creep effect even if we provide shrinkage strips during casting.
Whenever building dimensions exceeds 45 mtr one should do temperature and shrinkage analysis by adding one more primary load case.� The load factors to be considered while combining temperature, shrinkage load with DL and LL are as under as per SP:24:983
� 1. ��1.4 �(D.L.+T) � 2. � �0.75 (1.4 DL+1.4 T + 1.7 LL)
Note:��� Earthquake separation joints between adjacent units shall be catered for as per clause 7.11.3 of IS 1893 (Part-I) 2002.
�
�
Regards,
S C Mehrotra
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thirumalaichettiar
Silver Sponsor
Joined: 26 Jan 2003
Posts: 3552
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| Posted: Sat Dec 01, 2012 3:51 pmPost subject: |
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Reference to Er.S C Mehrotra , I would like to bring another aspect of joint SEISMIC JOINT. This is different from Expansion joint.
Viewers can browse the link below for some more informations onExpansion joint.
//www.buonovino.com/forum/viewtopic.php?t=9857
//www.buonovino.com/forum/viewtopic.php?t=5279
DILATION JOINT:
Browse the link below.
//www.buonovino.com/forum/viewtopic.php?t=6671
Seismic and Expansion joint
//www.buonovino.com/forum/viewtopic.php?t=5190
T.RangaRajan. |
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Surendra S
SEFI Member
Joined: 25 Sep 2009
Posts: 16
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| Posted: Sat Dec 01, 2012 4:15 pmPost subject: Expansion Joints |
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Dear Sefians
Whether the clause 7.11.3 is practically possible in high rise buildings.? pls suggest...
rgds
Surendra
On Sat, Dec 1, 2012 at 8:25 PM, subhash_mehrotra forum@www.buonovino.com)> wrote:
| Quote: |
Dear All,
As per clause 27.2 of IS-456:2000, the structures exceeding 45 mtr in length are to be designed with one or more expansion joints.�
Considering that below ground the effect of temperature is less, one should provide joints in basement portions at a spacing of about 90.0 mtr.� When joints are provided more than 90 mtr spacing, cracks do appear after passage of time due to creep effect even if we provide shrinkage strips during casting.
Whenever building dimensions exceeds 45 mtr one should do temperature and shrinkage analysis by adding one more primary load case.� The load factors to be considered while combining temperature, shrinkage load with DL and LL are as under as per SP:24:983
� 1. ��1.4 �(D.L.+ T) � 2. � �0.75 (1.4 DL + 1.4 T + 1.7 LL)
Note:��� Earthquake separation joints between adjacent units shall be catered for as per clause 7.11.3 of IS 1893 (Part-I) 2002.
�
�
Regards,
S C Mehrotra
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thirumalaichettiar
Silver Sponsor
Joined: 26 Jan 2003
Posts: 3552
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| Posted: Sat Dec 01, 2012 4:56 pmPost subject: |
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Er.Surendra ,
Pl.inform which code the clause the clause 7.11.3 is present?
T.RangaRajan. |
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shahnawaz.sdk
SEFI Member
Joined: 24 Jan 2010
Posts: 2
Location: Thane
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| Posted: Sun Dec 02, 2012 3:04 pmPost subject: Expansion Joints |
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Hi
Is there any book which can explain the calculation and effect of temperature n creep on buildings.
Regards
Shahnawaz Siddiqui
Integrated Buildings
On 01-Dec-2012, at 20:25, "subhash_mehrotra" forum@www.buonovino.com)> wrote:
| Quote: |
Dear All,
As per clause 27.2 of IS-456:2000, the structures exceeding 45 mtr in length are to be designed with one or more expansion joints.
Considering that below ground the effect of temperature is less, one should provide joints in basement portions at a spacing of about 90.0 mtr. When joints are provided more than 90 mtr spacing, cracks do appear after passage of time due to creep effect even if we provide shrinkage strips during casting.
Whenever building dimensions exceeds 45 mtr one should do temperature and shrinkage analysis by adding one more primary load case. The load factors to be considered while combining temperature, shrinkage load with DL and LL are as under as per SP:24:983
1. 1.4 (D.L.+ T) 2. 0.75 (1.4 DL + 1.4 T + 1.7 LL)
Note: Earthquake separation joints between adjacent units shall be catered for as per clause 7.11.3 of IS 1893 (Part-I) 2002.
Regards,
S C Mehrotra
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Prasad Ghodekar
SEFI Member
Joined: 04 Nov 2008
Posts: 1
Location: India
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| Posted: Sun Dec 02, 2012 6:43 pmPost subject: Expansion Joints |
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Hello Sir,
I am working on one of such kind of project. Do you have further study material for the same. Also, if you any example on this, please let me know.
Many Thanks.
Regards,
Prasad Ghodekar.
On 1 December 2012 20:25, subhash_mehrotra forum@www.buonovino.com)> wrote:
| Quote: |
Dear All,
As per clause 27.2 of IS-456:2000, the structures exceeding 45 mtr in length are to be designed with one or more expansion joints.�
Considering that below ground the effect of temperature is less, one should provide joints in basement portions at a spacing of about 90.0 mtr.� When joints are provided more than 90 mtr spacing, cracks do appear after passage of time due to creep effect even if we provide shrinkage strips during casting.
Whenever building dimensions exceeds 45 mtr one should do temperature and shrinkage analysis by adding one more primary load case.� The load factors to be considered while combining temperature, shrinkage load with DL and LL are as under as per SP:24:983
� 1. ��1.4 �(D.L.+ T) � 2. � �0.75 (1.4 DL + 1.4 T + 1.7 LL)
Note:��� Earthquake separation joints between adjacent units shall be catered for as per clause 7.11.3 of IS 1893 (Part-I) 2002.
�
�
Regards,
S C Mehrotra
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sudeepmgs
SEFI Member
Joined: 24 Sep 2009
Posts: 2
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| Posted: Mon Dec 03, 2012 5:15 amPost subject: Expansion Joints |
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Respected sir,
�� Thank you sir, this is very good information for row and high rise structures.
Regards,
SUDEEP MG
Bangalore.
On Sat, Dec 1, 2012 at 8:25 PM, subhash_mehrotra forum@www.buonovino.com)> wrote:
| Quote: |
Dear All,
As per clause 27.2 of IS-456:2000, the structures exceeding 45 mtr in length are to be designed with one or more expansion joints.�
Considering that below ground the effect of temperature is less, one should provide joints in basement portions at a spacing of about 90.0 mtr.� When joints are provided more than 90 mtr spacing, cracks do appear after passage of time due to creep effect even if we provide shrinkage strips during casting.
Whenever building dimensions exceeds 45 mtr one should do temperature and shrinkage analysis by adding one more primary load case.� The load factors to be considered while combining temperature, shrinkage load with DL and LL are as under as per SP:24:983
� 1. ��1.4 �(D.L.+ T) � 2. � �0.75 (1.4 DL + 1.4 T + 1.7 LL)
Note:��� Earthquake separation joints between adjacent units shall be catered for as per clause 7.11.3 of IS 1893 (Part-I) 2002.
�
�
Regards,
S C Mehrotra
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