In this study, a frame work for verification of famous seismic codes is utilized. To verify the seismic codes performance, damage quantity of RC frames is compared with the target performance. Due to the randomness property of seismic design and earthquake loads excitation, in this paper, fragility curves are developed. These diagrams are utilized to evaluate performance level of structures whi...

In either elastic or dissipative seismic design of structures, key issue is the optimal design of the lateral load resisting system. Beside the basic effort to provide economical structure, proper overall behaviour with global ductility cannot be achieved without optimized design of the seismic resistant system. In this paper, development of a numerical optimization algorithm is presented and –...

abstract for seismic design, it is important to estimate the, maximum lateral displacement (inelastic displacement) of the structures due to earthquakes for several reasons. seismic design provisions estimate the maximum roof and storey drifts occurring in major earthquakes by amplifying the roof displacement and drifts of the structures obtained by elastic analysis subjected to seismic design ...

In order to produce an accurate depth migration of a seismic line, one needs an accurate velocity model. This model should reflect the lithology and lithostatic load that the rocks have experienced through burial and deformation. If we understand the geometry of these rocks, and their behaviour upon deformation, we can produce a more accurate velocity model. Performing palinspastic restoration ...

Substations, key components of electric power systems, are susceptible to significant damage under seismic events. The overall goals of this task are seismic design and rehabilitation of existing substations using advanced technologies to reduce the likelihood of failure and/or to enhance the probability of postearthquake system functionality in a timely manner. It will also ensure long-term re...

Experimental proof is provided of an unconventional seismic design concept, which is based on deliberately underdesigning shallow foundations to promote intense rocking oscillations and thereby to dramatically improve the seismic resilience of structures. Termed rocking isolation, this new seismic design philosophy is investigated through a series of dynamic centrifuge experiments on properly s...

Lifelines are essential to urban life as they include all kinds of facilities and systems as water, gas, fuel, power, communication and transportation. The scope of this paper is to evaluate the influence of the uncertainties of seismic load and damage state definition in system’s reliability. At first, a rapid pre-estimation of the reliability of the system just after the earthquake is conduct...

This study investigates the sensitivity of design variables such as ultimate strength of concrete, yield stress of reinforcing steel and damping ratio to the seismic response of staggered wall structures. Two different methods for sensitivity analysis, the tornado diagram method and the first-order second-moment method, are applied to two types of model structures. Non-linear dynamic analyses a...

Knowledge of the yield point and ductility of a structure is important in seismic design. The yield point of an assembly is defined as a point where it begins to plastically deform, while ductility describes its ability to yield without substantial reduction in strength. These parameters can be determined from the analysis of the load-deformation curves resulting from destructive tests. To date...