Compare the calculated values with those obtained using Graph A.10 in Appendix A.

Cultural and Social Considerations in Health Assessment by Geoffrey

Short Column and Slender Column Template

  1. A 16 in. square column is reinforced with four No. 11 (No. 36) bars, one in each corner, with cover distances 3 in. to the steel center in each direction. Material strengths are and . Construct the interaction diagram relating axial strength Pn and flexural strength Mn. Bending will be about an axis parallel to one face. Calculate the coordinates for Po, Pb, and at least three other representative points on the curve.

2.Starting with the column in Problem 1, perform enough additional calculations to determine the effects of increasing from 5000 to 8000 psi on column capacity at both high and low axial loads. Assuming that a compressive strength of 8000 psi is appropriate for the lower stories of a high-rise structure, would you recommend using concrete with for the columns supporting all stories within the building? Use your analysis to support your answer.

 

3.The short column shown in Fig. P9.4 will be subjected to an eccentric load causing uniaxial bending about the Y axis. Material strengths are fy = 60 ksi and .

(a) Construct the nominal strength interaction curve for this column, calculating no fewer than five points, including those corresponding to pure bending, pure axial thrust, and balanced failure.

(b) Compare the calculated values with those obtained using Graph A.10 in Appendix A.