A. Determine the design moment strength for the composite beam shown in Figure 3. The concrete has a design strength of 4 ksi; use Fy = 50 ksi for the steel beam. Assume full-composite action. For W24×55: A = 16.2 in.2, d = 23.6 in., x = 1350 in.4. [ B. If beff is reduced from 72 in. to 42 in. (41.67% cuuction in effective area of concrete, Ac), the design moment strength for the composite beam shown in Figure 3 will be reduced by how much? Assume that design moment strength for part (A) is 1000 ft-kip. Report your answer as a percentage. Figure 3: beft = 72" W24 X 55

A. Determine the design moment strength for the composite beam shown in Figure 3. The concrete has a design strength of 4 ksi; use Fy = 50 ksi for the steel beam. Assume full-composite action. For W24×55: A = 16.2 in.2, d = 23.6 in., x = 1350 in.4. [ B. If beff is reduced from 72 in. to 42 in. (41.67% cuuction in effective area of concrete, Ac), the design moment strength for the composite beam shown in Figure 3 will be reduced by how much? Assume that design moment strength for part (A) is 1000 ft-kip. Report your answer as a percentage. Figure 3: beft = 72" W24 X 55

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Types of Composite

Composite materials are formed by merging two components that have different chemical and physical properties. The merged output is termed as a composite, whose properties are completely different from the individual components. Composite materials also have better strength than the individual components.Composite materials usually have two main parts, reinforcement material, and matrix material. The matrix material acts as a binder and surrounds the fiber of another material that bears a much higher strength. This material is known as the reinforcement material. The matrix materials are usually high-strength additives resins, while the fibers of the reinforced material can be random, oriented, and in a mat format.Composite materials are also known as fiber-reinforced composite polymers because they are composed of the polymer matrix which is reinforced to laboratory-created fibers or naturally occurring fibers, such as glass fibers, carbon fibers, or aramid fibers. Under the application of external loads, the matrix material absorbs and transfers the loads to the fibers, these fibers in return provide good compressive strength, tensile strength, and stiffness to the fiber-reinforced composite materials.Depending upon the matrix and the reinforcement material, different properties can be induced to the fiber-reinforced composite materials, including good corrosion resistance properties. The most common matrix material is the resin while the glass fibers act as the reinforcement material. Strong fibers provide strength and stiffness to the composite materials while, a soft and flexible resin provides shape to the composite materials.

Question

A. Determine the design moment strength for the composite beam shown in Figure 3. The concrete has a
design strength of 4 ksi; use Fy = 50 ksi for the steel beam. Assume full-composite action. For W24x55: A
16.2 in.2, d = 23.6 in., Ix = 1350 in.4. [
B. If beff is reduced from 72 in. to 42 in. (41.67% cuuction in effective area of concrete, Ac), the design
moment strength for the composite beam shown in Figure 3 will be reduced by how much? Assume that
design moment strength for part (A) is 1000 ft-kip. Report your answer as a percentage.
Figure 3:
ber
www
72"
K
9
W24 X 55

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Step 3: (A) Determine the deisgn moment capacity.

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Step 4: (B) Determine the depth of reduced stress block.

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