4-1 Figure P4.1 shows a simply supported beam and the cross section at midspan. The beam supports a uniform service (unfactored) dead load consisting of its own weight plus 1.4 kips/ft and a uniform ser- vice (unfactored) live load of 1.5 kips/ft. The con- crete strength is 3500 psi, and the yicld strength of the reinforcement is 60,000 psi. The concrete is normal-weight concrete. Use load and strength- reduction factors from ACI Code Sections 9.2 and 9.3. For the midspan section shown in Fig. P4-1b, compute M, and show that it exceeds M.. Wo = 14 kips/it plus weight of besm WL - 1.5 kipa/it (a) 20 t 21.5 in. 24 in. (b) 3 No. 9 bars 12 in. 目工

4-1 Figure P4.1 shows a simply supported beam and the cross section at midspan. The beam supports a uniform service (unfactored) dead load consisting of its own weight plus 1.4 kips/ft and a uniform ser- vice (unfactored) live load of 1.5 kips/ft. The con- crete strength is 3500 psi, and the yicld strength of the reinforcement is 60,000 psi. The concrete is normal-weight concrete. Use load and strength- reduction factors from ACI Code Sections 9.2 and 9.3. For the midspan section shown in Fig. P4-1b, compute M, and show that it exceeds M.. Wo = 14 kips/it plus weight of besm WL - 1.5 kipa/it (a) 20 t 21.5 in. 24 in. (b) 3 No. 9 bars 12 in. 目工

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

Design criteria for structural loading

The different loads such as loads due to self-weight (dead load) and external loads such as live load, wind loads, seismic load, snow load, and other loads and load combinations that influence the design of a building are called structural loading. The nature of the applied load differs from changes in the location, design, and type of materials used. The design criteria require that structures must be designed and constructed to be able to withstand all load types that are expected to act upon the structure and render its usage for the designated purpose. The structural members such as beams, slabs, columns, and foundations help the structure to withstand the applied load. There are different institutes such as ASCE and ACI that provide building design codes to assure minimum safety requirements and quality of the structures.

Question

4-1 Figure P4.1 shows a simply supported beam and
the cross section at midspan. The beam supports a
uniform service (unfactored) dead load consisting
of its own weight plus 1.4 kips/ft and a uniform ser-
vice (unfactored) live load of 1.5 kips/ft. The con-
crete strength is 3500 psi, and the yicld strength of
the reinforcement is 60,000 psi. The concrete is
normal-weight concrete. Use load and strength-
reduction factors from ACI Code Sections 9.2 and
9.3. For the midspan section shown in Fig. P4-1b,
compute M, and show that it exceeds Mu-
Wo = 14 kips/it plus weight of beam
WL - 1.5 kipa/it
(a)
20 ft
21.5 in. 24 in.
(b) 3 No. 9 bars
12 in.
Fig. P4-1

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