Q3: Calculate the required column stiffness of single one- story structure to limit its acceleration amplitude to 2.1 m/s2 during an earthquake whose acceleration amplitude is 150 mm/s2 at a frequency of 50 rad/s. The mass of structure is 2000 kg. Assume a damping ratio of 0.025.

12.7 The lateral force that is generated during building shaking can be calculated with the equation: Force = mass x acceleration, Based on this, which one of the following statement(s) is correct? ⚫ A building's total seismic design force is proportional to its weight. ⚫ Seismic forces are applied at the ground level; therefore, a building's upper floors have very small seismic force. ⚫ The largest seismic force is generated at the upper floors where they have the highest acceleration. . Seismic protective devises that dampen (reduce) building acceleration may be used to reduce the building seismic force. 12.8 Given five-story building, that weighs a 100kips and has concrete shear walls and special moment-resisting frames: a) Determine Response Modification Factor, R, from ASCE 7, Table 12.2-1 for Dual System of Special Moment Frame and Special reinforced concrete shear wall (Type D-3) b) Calculate Seismic Base Shear (V) using the following ASCE 7 equations and building information:…

A steel beam, of lengths a = 6 m and b = 3 m and a hollow box cross section, is supported by a hinge support A and roller support B, see Figure Q.1. The width and height of the cross section are 200 mm and 300 mm, respectively, and the wall thickness of the cross section is 5 mm. The beam is under a distributed load of the intensity that linearly varies from q=0 kN/m to q = 3.1 kN/m for AB span; and is constant with q = 3.1 kN/m for BC span. The Young's modulus of steel is 200 GPa. A y, v a 5 mm 200 mm Figure Q.1 9 A B 300 mm b C X

A steel beam, of lengths a= 6 m and b= 3 m and a hollow box cross section, is supported by a hinge support A and roller support B, see Figure Q.1. The width and height of the cross section are 200 mm and 300 mm, respectively, and the wall thickness of the cross section is 5 mm. The beam is under a distributed load of the intensity that linearly varies from q = 0 kN/m to q = 3.1 kN/m for AB span; and is constant with q= 3.1 kN/m for BC span. The Young's modulus of steel is 200 GPa. Part A Calculate: A y, v a 5 mm 200 mm Figure Q.1 9 S B 300 mm b с X