Question 2 (25 marks) Answer the following questions. You may draw figures to supplement your answers. a) Figure 2(a) sh

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Question 2 25 Marks Answer The Following Questions You May Draw Figures To Supplement Your Answers A Figure 2 A Sh 1 (44.05 KiB) Viewed 19 times

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Question 2 (25 marks) Answer the following questions. You may draw figures to supplement your answers. a) Figure 2(a) shows a rigid frame structure subjected to lateral forces. Estimate the top drift using approximate method of analysis. Consider the racking component only. Note that moments of inertia of beam (19) and column (Ic) are defined in Figure 2(a). (9 marks) b) Estimate the top drift of the tubular structure shown in Figure 2(b) using approximate method of analysis. The structural parameters and wind load are defined Figure 2(b). Assume that the wind force is uniform along the building's height. (6 marks) c) Discuss the differences between linked shear wall and coupled shear wall systems. Explain why coupled shear wall system is more effective in resisting lateral forces. (5 marks) d) Explain why core outrigger system can greatly enhance the overturning resistance of tall buildings. Discuss the reason why the structural performance can be further enhanced when belt-trusses is used. (5 marks)
60 KN 3m 120 KN 3m 120 KN 3m 120 KN 3m Rigid base 5m 5m
d = 45 m (totally 16 columns with column spacing of 3 m) Column area A = 200000 mm Height of building H = 200 m Elastic modulus E = 40 kN/mm2 b = 45 m (totally 16 columns with column spacing of 3 m) NOT to scale y-direction
Ac = 5000 mm E = 200 GPa 1, (mm) Ic[mm] 500(106) 300(105)
w [kN/m] Uniform wind load along y-direction 280