Design Principles of Concrete Structures Lecture 9 Bar Bending Schedule Bar Bending Schedule Serial # Bar Designation Number of Bars Length of one Bar Dia of bar Weight of Steel Required Shape of Bar #10 #13 #15 #19 #25 1 M-1 #25 2 S-1 #10 3 H-1 #15 Σ Total weight of steel = 1.05Σ […]
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Lecture 8 Load Transfer from Slabs to Beams One-way slab Two-way slab Two types of load distribution to beams Isolated One Way Slab Continuous One Way Slab Continuous One Way Slab Continuous One Way Slab Isolated Two Way Slab Continuous Two Way Slab One-way slab Two-way slab Two types of load distribution to beams Load Carried
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Design Principles of Concrete Structures Lecture 7 Capacity Analysis & Rebar Guidelines Capacity Analysis of Singly Reinforced Rectangular Beam by Strength Design method Data Dimensions, b, h, d and L (span) fc’, fy, Ec, Es As Required ΦbMn Load Carrying Capacity Capacity Analysis of Singly Reinforced Rectangular Beam by Strength Design method (contd…) Solution Step #
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Design Principles of Concrete Structures Lecture 6 Under Reinforced & Over Reinforced (Derivation) Under-Reinforced Failure Stage-I, Un-cracked Section N.A. position is fixed, means “la” remains constant. Only “T” and “Cc” increase with the increase of load Stage-II, Cracked Section When section cracks, N.A. moves towards compression face means “la” increases. “T” and “Cc” also increase.
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Design Principles of Concrete Structures Lecture 5 Study of Flexural Behavior (Derivation) Balanced Steel Ratio, ρb 𝐴𝑆 𝜌 =𝑏𝑑 It is corresponding to that amount of steel which will cause yielding of steel at the same time when concrete crushes. At ultimate stage: Strain Diagram ab = depth of equivalent rectangular stress block when balanced
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Design Principles of Concrete Structures Lecture 4 Study of Flexural Behavior (Derivation) Assumption for the Study of Flexural Behavior Plane sections of the beam remains plane after bending. The material of the beam is homogeneous and obeys hooks law Stress ∞ Strain Perfect bond exists between steel & concrete so whatever strain is produced in
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Concrete Technology Lecture 3 Shrinkage & Creep Concrete Testing Criteria Shrinkage “Shrinkage is reduction in volume of concrete due to loss of water” Coefficient of shrinkage varies with time. Coefficient of shortening is: 0.00025 at 28 days 0.00035 at 3 months 0.0005 at 12 months Shrinkage = Shrinkage coefficient x Length Excessive shrinkage can be
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Design Loads & Load Combinations Lecture 2 Concrete Technology Specification & Codes These are rules given by various organizations in order to guide the designers for safe and economical design of structures Various Codes of Practices are ACI 318 By American Concrete Institute. For general concrete constructions (buildings) AASHTO Specifications for Concrete Bridges. By American Association of State Highway and
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Concrete Technology Design Principles of Concrete Structures .Text Book Concrete Structures (Part-I) by Zahid Ahmad Siddiqi .References Reinforced Concrete (6th Edition) by Edward G. Nawy Design of Concrete Structures (14th Edition) by Arthur H. Nilson, David Darwin & Charles W. Dolan Building Code Requirements for Structural Concrete (ACI 318-19) Concrete Concrete Concrete is a mixture of
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International Standard ISO American National Standard A0 : 841 x 1189 mm – A : 8.5″ x 11″ A1 : 594 x 840 mm – B : 11″ x 17″ A2 : 420 x 594 mm – C : 17″ x 22″ A3 : 297 x 420 mm – D : 22″ x 34 “
Submission Drawing or BASIC BLUEPRINT READING Read More »
