Luk

It can be opened Sap2000 v24 with and older version of sap2000 also . Please look the belove video tutorial how to open the sap2000 file in an older version of software : Tutorial Sap2000 - Open a newer file of Sap2000 in older version https://www.youtube.com/watch?v=o2Do1ag5jdM

Please look the belove video tutorial how to open the sap2000 file in an older version of software : Tutorial Sap2000 - Open a newer file of Sap2000 in older version https://www.youtube.com/watch?v=o2Do1ag5jdM

Someone can make footfall analisys in SAP2000 ? Dynamic modal analisys , for the above reinforced concrete slabless open well stair analisys

I have in my official projekt a slabless stair : 3 flyings and 2 landings , 120cm width , Riser = 17cm and Tread = 30cm , but thickness 15cm. I wish to reduce the thickness to 10cm . You can see my stair dimensions in attached pictures . First and third flying have 6 x 30cm treads , and the second flying have 5 x 30cm treads. I have the SAP2000 v24 modell . Can someone to check the attached SAP2000 v24 modell if it's correct or not , and if can be reduced the thickness of stair to 10cm ? I'm interested about Load Combination : 1.35 x ( Self Weight + Finish Weight ) + 1.5 x ( Live Load ) Live Load = 3kN/m2 Finish Weight = 0.5kN/m2 In attached images are screenshots from a book , and that formulas are in attached Excell spreadsheet . I wish to check the SAP2000 modell will give me the same results that one from Excel spreadsheet ? In Section 2-2 the stair it's sustained from side beam just 107.5cm by both of landing , because there are 180cm window also . Can you someone help me to check the slabless stair if it can be reduced to 10cm thickness ? ( cantilevered sustain from RC wall + longitudinally sustain . Right now it's brick wall in side of Section 1-1 and 3-3 , but i can make RC wall instead of brick to sustaing the slabless stair cantilevered together with longitudinally ) For flying 1 and 3 , ( Section 1-1 and 3-3 ) i can make to have cantilever sustain also from RC wall from the side of flying. Flying 2 ( Section 2-2) can't be made it with cantilever sustain because there it's a window. For Section 1-1 and 3-3 i wish that all Riser to be a cantilever beam : 27cm x 10cm x 120cm Live Load 3kN/m2 , concrete 20N/mm2 ( C25/30 concrete but with 1.5 safety factor = 20N/mm2 ) and rebar 430N/mm2 ( 500N/mm2 but with 1.15 safety factor = 430N/mm2 ) I wish to make the stair just like in belove link , but just 10cm thickness instead of 15cm that i have right now in my official projekt , and the longitudinally sustains to be with stirrup loops from 8mm rebars . Cantilevered sustain from RC wall rebars will depends of what bending moments will get ( logitudinally , transversal and twisting bending moments ) - maybe 4 x 16mm in top and 4 x 10mm rebar in bottom for every tread ? Or 2 x 12mm rebars in top + 1 x 12mm of every Riser and 2 x 12mm in bottom + 1 x 12mm of every Riser ? For 10cm thickness the stirrup loops must to have 6cm width and 2 x 2cm concrete cover . Tread stirrup = 36cm x 6cm ( 30cm tread + 10cm thickness = 40cm - 2 x 2cm concrete cover = 36cm ) Riser stirrup = 23 x 6cm ( 17cm riser + 10cm thickness = 27cm - 2 x 2cm concrete cover = 23cm ) I have the stair projekt in .dwg form also , so if anyone can help me , i can send them in .dwg form also . Cypress – Cantilevered concrete stair - Vancouver - STUDIO-TM https://studio-tm.com/constructionblog/?p=1754 Sap2000_Modell.rar SLABLESS STAIR-1_My_Projekt-modificat_Update1.xlsx

I’m worry about long time deflection of cantilever slab and Bowindow which are supported by cantilever beams . Because of arhitectural reasons the depth of beam can be just 59cm x 25cm . And i’m worry about stresses from Brick Madonry walls , because the cantilever it’s supported by concrete walls , but the rest of building it’s : Load Bearing Confined Masonry from Brick walls . The Building it’s a residential house with : Ground Level + 1 Storey . The opening of cantilever it’s 3.5m from corner to left and 3.5m to right . But in outside of cantilever beams are 60cm width slab also and 4m long , in both of cantilever beams . In attached pictures , with red colour it’s the cantilever beams : but just 59cm x 25cm

But how can we know in CSI SAFE if the moments in slab are : under cracking moment or not ? How can we find in CSI SAFE if the moments in slab are small or not ? How can we find in CSI SAFE where it’s the limit between cracking moment and under cracking moment in slab ? In other words how can we find in CSI SAFE in which moment it’s the slab moment ? It’s cracked ? Or under cracked ? Because we have 2 cases : a) If the moment in slab are cracked : than we can increase JUST the Tension stell ( TOP steel in Cantilever slab ) to reduce the deflection . Without to change compression steel ratio ! b) If the moment in slab are under cracked moment ( small moment ) , than we need to increase together ( simultaneously ) Tension ( TOP steel ) + Compression ( BOTTOM steel ) in Cantilever slab , to reduce ( decrease ) the deflection . We need to know in CSI SAFE in which moment are the slab : cracked or uncracked moment . But how can we find this ?

Can you look the attached Etabs model and tell me your opinion , specially about concrete cantilever ? Brick Confined Masonry with Concrete Cantilever I know you have a verry big experience with Etabs and as Structural Engineer also For you this structure it's a childrem game Codes : Eurocode 2 thank you luk structure.rar

@Rana , i’ve try it to contact you in email and Skype , but without succes . Can you help me with an Etabs&Safe Analisys for a verry small 2 leves building , 160qm , but with long opened corner cantilever please contact me an email : Luk2011 at yahoo dot com I hope you will get this message and will want you to help me