Tee beam
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This document provides information on the analysis of T-beams, including: 1) It defines T-beams and L-beams as beams with flanges projecting from one or both sides of the web, forming a T or inverted L shape. 2) It explains the concept of a T-beam as a combination of a rectangular beam and slab portion, and provides the formula to calculate the overall depth. 3) It shows the stress-strain diagram for a T-beam and defines terms like neutral axis, compression and tension forces, and lever arms. 4) It describes how to determine the position of the neutral axis based on the relative magnitudes of compression and tension forces.
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This ppt is more useful for Civil Engineering students.
I have prepared this ppt during my college days as a part of semester evaluation . Hope this will help to current civil students for their ppt presentations and in many more activities as a part of their semester assessments.
I have prepared this ppt as per the syllabus concerned in the particular topic of the subject, so one can directly use it just by editing their names.
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I have prepared this ppt during my college days as a part of semester evaluation . Hope this will help to current civil students for their ppt presentations and in many more activities as a part of their semester assessments.
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Tee beam
- 1. PREPARED BY: Asst. Prof. GAURANG PRAJAPATI CIVIL DEPARTMENT TEE BEAM Mahatma Gandhi Institute Of Technical Education & Research Centre, Navsari (396450) ELEMENTARY STRUCTURAL DESIGN 6TH SEMESTER CIVIL ENGINEERING
- 2. INTRODUCTION T-beam: If the flange projections are on either side of the rectangular web or rib ,the resulting cross section resembles the T-shape and hence is called T-beam. L-beam: If the flange projections is on one side ,the resulting cross section resembles an inverted ‘L’ and is termed as L-beam. ESD 2160607 2 TEE BEAM
- 3. CONCEPT OF T-BEAM ESD 2160607 3 TEE BEAM Tee beam = Singly Reinforced Rectangular beam + Slab portion = (bw × D) + (bf- bw) × df
- 4. STRESS STRAIN DIAGRAM FOR TEE BEAM ESD 2160607 4 TEE BEAM
- 5. STRESS STRAIN DIAGRAM FOR TEE BEAM Notation of diagram: ESD 2160607 5 TEE BEAM bf = Width of flange C1 = Force of Compression (in Concrete) = 0.36 fck bw xu Df = Depth of flange C2 = Force of Compression (in slab) = 0.446 fck (bf – bw) Df bw = Width of web T = Force of Tension (in Steel) = 0.87 fy Ast d = Eff. Depth of beam Z1 = Lever Arm = d – 0.42 xu D = overall depth of beam Z2 = d - 𝐷 2 Ast = Area of Steel fck = Compressive Strength of Conc. xu = Depth of Neutral Axis (N.A.) fy = Yield Strength of Steel
- 6. NEUTRAL AXIS: ESD 2160607 6 TEE BEAM Position of Neutral Axis (N.A): Fc = Force of Total Compression = 0.36 fck bf Df Ft = Force of total Tension = 0.87 fy Ast Conditions: If Fc > Ft N.A lies in the flange (xu < Df) If Fc < Ft N.A lies in the flange (xu > Df) If Fc = Ft N.A lies in the flange (xu = Df)
- 7. NEUTRAL AXIS: ESD 2160607 7 TEE BEAM Depth of N.A (xu) o If Fc > Ft N.A lies in the flange (xu < Df) C1 + C2 = T 0.36 fck bw xu + 0.446 fck (bf – bw) Df = 0.87 fy Ast …..(A) xu = ____mm o If Fc < Ft, N.A lies in the web (xu > Df) but if xu = _____mm ≯ Df, put Df = yf in equation (A) where yf = 0.15 xu + 0.65 Df Now, find new xu = ____mm
- 8. FLANGE WIDTH: ESD 2160607 8 TEE BEAM bf = 𝒍 𝟎 𝟔 + bw + 6 Df IS 456 Clause No.: 23.1.2 Page No.: 36, 37 Flange width (bf )of the T beams Flange width (bf )of the L beams bf = 𝒍 𝟎 𝟏𝟐 + bw + 3 Df IS 456 Clause No.: 23.1.2 Page No.: 36, 37 Where 𝑙0 = distance between points of zero moments in the beam (eff. Span) Df = depth of flange Bw = width of web
- 9. CONCEPTS OF T BEAM ANALYSIS ESD 2160607 9 TEE BEAM
- 10. CONCEPTS OF T BEAM ANALYSIS ESD 2160607 10 TEE BEAM