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The girder is then taken to the site and attached to the columns using elastomeric bearing pads. The bearings do not transfer moment but have a static coefficient of friction Of 0.9 (between bearing and dry concrete). 4 Time Effects You willalso need to know: CES 6706 - Adv. Reinforced Concrete ft = 7.5 ksi fc.7 days 5.5 ksi Type III Cement Average RH 2/4 180' Bearing Pads Precast beam is placed on the bearings As = 50 inz Es = 29,000 ksi Also, use an effective moment Of inertia for the columns equal to half Of the gross moment Of inertia: = 0.5/0 use the concrete strength at 7 days for the shrinkage and Creep calculations. (a) Considering long-term (t is very large) Creep and shrinkage effects, evaluate the amount Of deformations Ad that the girder will experience. (Assume that the bearing pad does not slip and note that the columns will restrain motion significantly) (b) What is the shear force in the column in this case? (c) Ifthe column's longitudinal steel bars yield at a drift (Ad/h) Of about 1.0%, what is the expected Stress in these bars given the evaluated Ad? (d) Will slip occur between the bearing pads and the beam? If so, how will this affect your answers to (a) through