A structure may be subject to several aftershocks after a mainshock. In many seismic design provisions, the effect of sequences is either not directly considered or has been underestimated. This study examined behavior reinforced concrete (RC) moment-resisting structures with shear walls under sequences. Two three-dimensional short and medium height were designed analyzed seven real mainshock–a...

Abstract Complexity and unpredictability nature of earthquakes makes them unique external loads that there is no formula used for the prediction seismic responses. Hence, this research aims to implement most well-known Machine Learning (ML) methods in Python software propose a model response performance assessment Reinforced Concrete Moment-Resisting Frames (RC MRFs). To prepare 92,400 data poi...

Computational modeling has served a powerful tool for studying cross-situational word learning. Previous research has focused on convergence behaviors in a static environment, ignoring dynamic cognitive aspects of concept change. Here we investigate concept drift in word learning in story-telling situations. Informed by findings in cognitive neuroscience, we hypothesize that a large ensemble of...

What mechanisms support our ability to estimate durations on the order of minutes? Behavioral studies in humans have shown that changes in contextual features lead to overestimation of past durations. Based on evidence that the medial temporal lobes and prefrontal cortex represent contextual features, we related the degree of fMRI pattern change in these regions with people's subsequent duratio...

This paper discusses the suitability of two optimization methods for use in seismic retrofit location selection. The structure for analysis is modelled after a seven story RC structure in California, USA, built according to 1964 Los Angeles City Building Code. The OpenSees parallel computing software package is used to model the dynamic behaviour of a test structure. Past earthquake records are...

Structures subjected to seismic forces must have adequate strength and stiffness to control inter storey drift in order to prevent damage to structural and nonstructural elements during excitations. Linked column concept for steel structures was proposed by Peter Dusicka et.al(2009) with the objective of utilizing replaceable components that are strategically placed to protect the gravity load ...

Recent developments in engineered timber products, and their availability, durability, renewability, have led to taller more flexible buildings. However, these buildings may experience excessive vibrations, resulting safety serviceability issues due wind or earthquake loads. This paper presents a dynamic analysis of 42-story-tall hybrid-timber building, along with comparative study the performa...

Seismic isolation systems exposed to far-fault earthquakes can reduce floor accelerations and story drift ratios acceptable levels. However, they exhibit different structural performances in each earthquake due excitation frequency contents. By optimizing the system parameters, their performance may be maintained at best level under earthquakes. In this study, optimization of parameters nonline...

this study contains the identification of modal dynamic properties of a 3-story large-scale steel test frame structure through shaking table measurements. shaking table test is carried out to estimate the modal properties of the test frame such as natural frequencies, damping ratios and mode shapes. among many different model structures, arx (auto recursive exogenous) model structure is used fo...