Structural Engineering & Construction Situation 57 (PH)

PAST BOARD EXAM PROBLEMS Structural Engineering & Construction Situation 57 A prestressed concrete beam 350 x 450 mm in cross section has a simple span of 8m. Given: Stresses due to external loads at midspan: Compression = 4.88 MPa Tension = 4.88 MPa Stresses due to prestressing force: Compression = 3.46 MPa Tension = 0.72 MPa Unit weight of concrete = 24 kN/m3

1. Determine the eccentricity (mm) of the prestressing wire used in the beam. (114.416)
2. Determine the superimposed uniform load applied in the beam in kN/m. (7.21)
3. Determine the combined bending stress (MPa) at the top fiber after a loss in prestressing of 20%. (6.864)

Prestressed Concrete Chapter 1 Introduction: https://tinyurl.com/28yk9k43 Chapter 2 Basic Concept: https://tinyurl.com/ynm9fykn

Credits:

1. Intro Template: https://youtu.be/D_UOajdPf-c
2. Music: 2.1 Driven to Success by Scott Holmes, Source: http://www.freemusicarchive.org 2.2 Instrumental (Guitar) by Carl Ernest Tayag, check his channel: https://www.youtube.com/channel/UC5jevz5Hgkv86NmLyGubzWA
3. Reference for the problem:

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