This course aims to develop basic expertise and skill among UG students about various practical aspects of seismic design of buildings and structures.
With all these challenges and high seismic risk, there is an urgent need of equipping the civil engineering students with state-of-the-art information about seismic hazard, risk and its mitigation. Besides having a high level of seismic hazard, the country is also confronted over the years with high rate of population increase and rapid growth of urbanization. This geological setting has resulted in a number of active seismic sources and faults in the region which are capable of producing moderate- to large-magnitude earthquakes. The country lies on a tectonically active Himalayan orogenic belt developed as a result of slow collision (extended over last 30-40 million years) among the Indian, Arabian, and Eurasian tectonic plates. Pakistan is located on a highly earthquake-prone and seismically active part of the world. No effects of soil-structure interaction are considered and the base of all columns and shear walls are assigned with idealized fixed or hinge support conditions. No nonlinear action is considered in RC retaining walls. The mass of floors are lumped at each floor. The slabs are modeled using elastic thin shell elements. The shear and torsional responses of beams, columns and shear walls are modelled as elastic. For the steel fibers, the bilinear elasto-plastic model is used with expected yield strengths. For concrete fibers, the Mander’s stress-strain model is used with expected material strength properties. The RC columns are modeled as a combination of nonlinear fiber elements at plastic hinge zone and elastic frame element at mid-section. The RC shear walls are modelled with nonlinear (concrete and steel) fiber elements throughout their lengths. The ASCE 41-17 modelling parameters are used for this purpose. The RC girders are modelled with moment-rotation hinges at both ends. For the purpose of an example demonstration, the following modeling scheme is followed in this document. It also presents a step-by-step methodology to construct the nonlinear computer models of RC building structures (for their detailed performance evaluation) using CSI ETABS 2016. This document compiles the basic concepts of inelastic computer modelling and nonlinear analysis of building structures. With the advent of performance-based seismic design methodology, the use of inelastic computer modeling and nonlinear analysis has rapidly increased in recent years. For the purpose of structural design, an understanding of these models, their underlying assumptions and analysis procedures is very important in order to arrive at an adequate and efficient design solution. The computer model of a structure is a compromise between the real structure and its mathematical representation. Earthquake Catalogue of Pakistan (2019).Pakistan Earthquake Ground Motion Database.Recommendations and Focus Areas for Improvement of BCP-2007.Nonlinear Modeling of RC Buildings using ETABS 2016.Probabilistic Seismic Hazard Analysis of Pakistan.Seismic Hazard Parameters for Pakistan (BCP-2021).Structural Cross-sections: Analysis and Design.
ETABS 2017 SYSTEM REQUIREMENTS SERIES
Video Lecture Series on Seismology and Seismic Hazard Analysis.CE – 842: Performance-based Seismic Design of Structures (Spring 2020).CE – 842: Performance-based Seismic Design of Structures (Spring 2022).AIT – CE 72.32: Design of Tall Buildings (Spring 2015).AIT – CE 72.52: Advanced Concrete Structures (Fall 2015).
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