Answer the following conceptual questions on reinforced concrete behavior in bending (flexure). a. Please briefly describe in words (1-3 sentences) what is meant by a tension-controlled beam and why it is desirable for a reinforced concrete beam design. b. Consider the stress diagram for a rectangular RC beam section at ultimate failure below. Explain the Whitney stress block and explain its dimensions. C. Consider the strain diagram below. Why is Ec = 0.003 and how does the value change for different concrete strengths (i.e., fő)?

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Crack Detection

Concrete materials are meant for supporting structures, building foundations and they act as several load-bearing structures. Over time, due to environmental conditions, and based on the constituent materials used, concrete materials are subjected to a great degree of distress. Corrosion of the reinforcement bars due to chemical influences, uneven base, earthquake, drying shrinkages, and alkali-aggregate reactions are some of the reasons for concrete distress.