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Lapping staggered

 
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dilip_ngangom
SEFI Member
SEFI Member


Joined: 26 Jan 2003
Posts: 3

PostPosted: Mon Nov 13, 2006 6:34 am    Post subject: Lapping staggered Reply with quote

Dear VijayWhether it is beam or column, at least 50% of the bars are to be staggered and that too would be outside the zone of h/4 in case of columns.RegardsDilipgeneral@sefindia.org wroteHello MembersCan anybody clarifies as to we suggest staggerd laps for bars in beams BUT FOR COLUMNS the reinforcement bars are lapped at the same place.with regardsVijaygeneral@sefindia.org wrote:-------------------------From: pinkal_1809@yahoo.co.inSubject: axial shortening of columnDate: 09/11/06Time: 12:43:05-------------------------Dear SEFIansWish you very happy day! my self pinkal gandhi i am a student of me (structure) in ddit collage for my thesis work I need your help regarding construction stage analysis of building also i need to code of aci (effacts of axial shortening of columns on design and construction of tall reinforced concrete building)Please provide me name of the book, author and publisher related to construction stage analysis.Any paper dealing to above mentioned topic, journalās name and month/year of publications.Kindly send me any material/literature you are having.With warm regards pinkal gandhi Find out what India is talking about on - Yahoo! Answers India Send FREE SMS to your friend\'s mobile from Yahoo! Messenger Version 8. Get it NOW-----------------From: rajmane@sercm.csir.res.inSubject: Concrete:Seismic Design-Basic QuestionsDate: 09/11/06Time: 13:43:01-------------------------9-11-2006Dear all1.) It is generally correct to say that as the concrete grade increases, the peak/crushing strain decreases. However, we should look at ductile behaiour of actual reinforced concrete member and this would depend on detailing also. It may not be adequate to look at concrete in isolation and therefore, it may not be necessary for the codes to specify a maximum limit on c
oncrete grade for seismic resistant design. 2.) The value of Modulus of Elasticity of concrete given in IS Code [ 5000 * squareroot (cube strength of concrete)],is for design purpose. The behaiour of actual reinforced concrete member would have the effect of confinement provided by the reinforcement, especially the stirrups, etc. The confinement effect would be often beneficial. N P Rajamane Deputy Director and Head, Concrete Composites Lab, Structural Engg Research Centre, CSIR, Taramani, Chennai 600113 (Ph : 22549152 (D), 22549150 (CCLab), Res: 224417882) Email : rajmane[AT]ser..., rajamanenp[AT]yah... : The above opinion is personal and it may not be necessarily the view of SERC.Then, why don\'t the codes specify a maximum limit on concrete grade for seismic resistant design? 2.)Modulus of Elasticity of concrete as per IS Code is given as 5000*squareroot(cube strength of concrete) But , with reinforcement in it concrete would become more stiff.IS there any prescribe approximate value for reinforced concrete in any country code?  -----------------Message From  struct_tech[AT]red...: Date: 09/11/06Time: 15:09:50-------------------------Siddharth Subhedar-----------------Message From  parikshit_pandya[AT]red...: nominal mix designDate: 09/11/06Time: 16:18:39-------------------------Dear all,what are the general thumb rules for nominal mix design?Parikshit pandya-----------------Message From  design_sksk[AT]yah...
comSubject: Join sanjay kumar on Yahoo! Messenger!Date: 09/11/06Time: 17:38:49-------------------------sanjay kumar wants to talk with you using the new Yahoo! Messenger:Accept the invitation by clicking this link:http://invite.msg.yahoo.com/invite?op=accept&intl=us&sig=WraLXXHiOXxZV6_6geWI4um9uNrqUqEEDgxu80PEbUabfHh6LcCaNuBRt3I55m9Rim.Xrh9nbKRN_.jaz_wLI75SN7VWl5fvlJmz56lf24Hdut0aR1Cm8m2QKDVyagh2oGTKQ8o-With Yahoo! Messenger, you get:Free worldwide PC-to-PC calls.* All you need are speakers and a microphone (or a headset). If no one\'s there, leave a voicemail!IM Windows Live™ Messenger friends too. Add your Windows Live friends to your Yahoo! contact list. See when they\'re online and IM them anytime.Stealth settings keep you in control. Now you can get in touch on your time, by controlling who sees when you\'re online.So what are you waiting for? It\'s free. Get Yahoo! Messenger and start connecting how you want, when you want.*Emergency 999 calling services not available on Yahoo! Messenger. Please inform others who use your Yahoo! Messenger they must dial 999 through traditional phone lines or cell carriers. By using Yahoo! Messenger you agree to not use PC-to-PC calling in countries where prohibited. The above features apply to the Windows version of Yahoo! Messenger.-----------------Message From  nrupeny[AT]des...: Join sanjay kumar on Yahoo! Messenger!Date: 09/11/06Time: 18:23:52-------------------------Nice to ur invitation Mr Sanjay Kumar, am sorry to say dat i dont have yahooin my off to contact u currently.REGARDSNRUPEN.R.Y (Design Engineer)DESIGN EXCELLENCE (INDIA) Pvt.Ltd----- Original Message -----Message From  To: \"Nrupen R. Yadahalli\" Sent: Thursday, November 09, 2006 5:38 PMSubject: Join sanjay kumar on Yahoo! Messenger! sanjay kumar wants to talk with you using the new Yahoo! Messenger:&g
t; Accept the invitation by clicking this link:http://invite.msg.yahoo.com/invite?op=accept&intl=us&sig=WraLXXHiOXxZV6_6geWI4um9uNrqUqEEDgxu80PEbUabfHh6LcCaNuBRt3I55m9Rim.Xrh9nbKRN_.jaz_wLI75SN7VWl5fvlJmz56lf24Hdut0aR1Cm8m2QKDVyagh2oGTKQ8o- With Yahoo! Messenger, you get: Free worldwide PC-to-PC calls.* All you need are speakers and amicrophone (or a headset). If no one\'s there, leave a voicemail! IM Windows Live™ Messenger friends too. Add your Windows Livefriends to your Yahoo! contact list. See when they\'re online and IM themanytime. Stealth settings keep you in control. Now you can get in touch on yourtime, by controlling who sees when you\'re online. So what are you waiting for? It\'s free. Get Yahoo! Messenger and startconnecting how you want, when you want. *Emergency 999 calling services not available on Yahoo! Messenger. Pleaseinform others who use your Yahoo! Messenger they must dial 999 throughtraditional phone lines or cell carriers. By using Yahoo! Messenger youagree to not use PC-to-PC calling in countries where prohibited. The abovefeatures apply to the Windows version of Yahoo! Messenger.  -------------- !-- Virus-Free Mail Using PostMaster Express AvAc & QuickHeal Engine --!!-- Virus-Free Mail Using PostMaster Express AvAc & QuickHeal Engine --!--------------Design Excellence (India) Pvt Ltd, Thane, India-----------------Message From  dipeshtanuja[AT]red...: nominal mix designDate: 09/11/06Time: 19:27:57-------------------------Hi,Regarding nominal mix design of reinfirc
ed concrete M20 it is 1:2:3 of cement:sand:ageeregate with watercement ratio. On Thu, 09 Nov 2006 parikshit_pandya[AT]red... wrote : Dear all,what are the general thumb rules for nominal mix design?Parikshit pandya-----------------Message From  kajal.chopra[AT]red...: Seismic Analysis and DesignDate: 09/11/06Time: 20:13:18-------------------------Could anyone help me with the following questions pertaining to Seismic Analysis and Design:Consider the equivalent lateral force method:Now, if we determine the inertial forces by the equivalent lateral force method and design the structural members based on consequent linear elastic analysis.Right?Based on Seismic Design Philosophy the structural is in the inelastic range under the action of seismic forces.Right?It is possible , that , during the earthquake (wherein the structural is in the inelastic range) the bending moment at a certain section of the beam is less than that obtained from liner elastic analysis (due to redistribution of moments that occur after the material enters the inelastic range) but the consequent capacity of the section is more (as the section is designed based on outputs from linear elastic analysis).Right?Designing such a section based on outputs from linear elastic analysis would obviously result in the overstrength of the section.Right?This could cause a consequent brittle failure at another section,Right?Then, how is it justified to adopt equivalent lateral force method and consequent linera elastic analysis without considering redistribution of moments?Please help!!-----------------Message From  kajal.chopr
a@rediffmail.comSubject: Quantifying DuctilityDate: 09/11/06Time: 20:30:59-------------------------Text books on Seismic Analysis and Design quantify ductility based on either:a)Displacement Ductility(maximum displacement/yield displacement)b)Strain Ductility(maximum strain/yield strain)c)Curvature Ductility(maximum curvature/yield curvature)However, would there be any difference between the values of Displacement Ductility,Strain Ductility,Curvature Ductility?Because,strain is - displacenment/orignal length, then, would\'nt Displacement Ductility and Strain Ductility give same magnitudes?-------------------------Find out what India is talking about on - Yahoo! Answers India Send FREE SMS to your friend\'s mobile from Yahoo! Messenger Version 8. Get it NOW

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