Engineering

Aims and Objectives: To give students an understanding of the following: the principles of traffic engineering and infrastructure design; skills in the analysis of issues and interrelationships between them; skills in the collection, analysis and interpretation of data.. Content:

The possibility of pounding on isolated structures with surrounding moat walls is one of the concerns in the
design of isolation systems, especially in pulse-type near-field earthquakes. This paper puts forward the seismic
probability assessment of structures equipped with passive and smart hybrid isolation systems by considering
pounding possibilities. This investigation is performed on isolated structures equipped with a high damping
rubber bearing (HDRB) considering stiff moat walls around the structure. In the Hybrid isolation system, mag-
netorheological dampers (MR) are considered an adaptive dissipation energy device along with isolators using an
optimized novel interval Type-2 fuzzy logic controller with adaptive red-zone function (IT2FS + RZF) to reduce
pounding possibilities. The fragility curves of the building for various cases are determined using incremental
dynamic analysis (IDA), and possible damage costs are evaluated by using exceedance probability in each
damage level. This study concludes that the collapse probability of the isolated structures with restrains at the
code-based distance is over the acceptable limit of ASCE 7–22. The smart additional damping system with the
proposed controller reduces the possible damage cost of the building by about 64 % compared to the uncon-
trolled system and puts the collapse probability of the structure in the acceptable range.