Abstract In today's time, most seismic design codes are based on a linear elastic force-based approach that includes the nonlinear response (ductility and overstrength) of structure through reduction factor (named behavior q in Eurocode 8 [EC8]). However, use prescribed -factor is constant for given structural system may fail providing structures with same risk level. This paper focuses estimat...

The seismic performance of elliptic braced moment resisting frame (ELBRF) is assessed here and is found that the structural behavior is improved and is of free of architectural space. The demand for seismic performance of ELBRF is estimated through conventional pushover methods of 3, 5, 7, and 10-story ELBRF frames and they are compared with special moment resisting frames (SMRF) and X-Braced C...

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 ...

Although several studies have investigated the effect of degradation on the behavior of structures, investigations on collapse margin ratios are rare in the literature. In this study, the effect of strength and stiffness degradation on collapse capacity of steel moment frames is investigated. The aim is to determine margin of safety against collapse using a probabilistic approach. For this reas...

Mexico highway network has more than 14,000 bridges. Most of them are reinforced concrete (RC) structures. The bridges design process incorporates the use an overstrength factor that is not justified and received little attention in published works. Mexican regulations allow using for buildings range 2–3, to reduce spectra as a function selected seismic behavior factor. However, bridges, single...

This study investigates the high contents of cementitious materials in Portland cement concrete and assesses required (f’cr) actual (σ) compressive strength specimens. A linear optimization technique identifies binder content to reach f’cr. Standard specifications have overdesign (OD) for decades, but few studies evaluated magnitude OD from field data. The 958 cylinders prepared represented 820...

Seismic design modification factors (SDMFs) control the estimated force and displacement to structures during seismic events. codes recommend similar SDMFs for short andlong-span structures. Therefore, this study investigated effect of span length on steel frames with high ductility. For purpose, nine three different lengths 5, 10, 15 m were selected designed according specifications ASCE/SEI 7...

To avoid the damage of connection due to overstrength beam strength, and alternation strength hierarchy in structural system, a novel precast concrete beam-to-column is proposed herein. In connection, replaceable energy-dissipation connector (REDC) was placed at bottom hidden corbel. addition, narrow vertical slot adjacent corbel reduce overstrength. First, features mechanical mechanism were di...