Reinforcement Detailing of Beams from ETABS output
THIS PROBLEM IS DIVIDED INTO 2 PART
FIRST IS TO MAKE SURE THE BEAM OF 3M WHICH FAILED IN SHEAR PASSES.
TO MAKE IT PASS WE CAN EITHER INCREASE THE AREA OR GRADE OF CONCERTE.
NEXT PART IS TO DETAILS THE 3SPAN AND 7SPAN BEAM.
PROCEDURES TO DETAIL BEAM.
- FIRST WE HAVE TO ANALYIZE THE GIVEN STRUCTURE AND DESIGN THE STRUCTURE.
- LATER WE CAN EXTRACT THE AREA OF STEEL REQ FOR MAIN STEEL AND SHEAR STEEL USING SHOW DESIGN DATA.
- FROM THE GIVEN STEEL AREA WE CAN COME UP WITH THE REQ AMOUNT OF STEEL WITH SPECIFIC DIA WHICH SATISFIES THE REQUIREMENTS.
- WE NEED TO REMEMBER THAT THE EXTRA BAR AT THE EDGE SHOULD BE PROVIDE TILL L/4 OR L/3
- WHILE THE STIRRUPS AT THE EDGE SHOULD BE 2d, WHERE D IS EFFECTIVE DEPTH OF BEAM.
- IN MIDSPAN IT SHOULD NOT BE GREATER THAN d/2.
- ALSO STIRRUPS OR HOOK SPACING SHOULD NOT BE MORE THAN 100MM AT SUPPORT.
- IN SOME CASES THE SHEAR REQ IS EXTENDED BEYOND 2d, WHICH CAN BE CHECKED IN LOCAL POINT RESULT IN ETABS IF SUCH IS THE CASE WE SHOULD EXTEND THE 100MM SPACING TILL THAT REGION.
- AFTER PROVIDING THE SHEAR WITH SPACING ALWAYS CHECK THE SWAY SHEAR LEFT AND RIGHT CONDITION WHICH ACC TO OUR REQ IS SATISFIED. AROUND 250KN.
- ANCHORAGE LENGTH ACC TO IS 13920-2016 CLAUSE 6.2.5 IS Ld+10Db-90° bend deduction.
- I HAVE DETAILED THE BEAM USING ALL THIS CONCEPTS IN MIND AND CALCULATED THE AST REQ AND AMOUNT OF STEEL IN PROVIDED. IN BELOW EXCEL SHEET.
- ALSO ATTACHED THE DWG OF DETAILED BEAM.