this article studied static deflection, natural frequency and nonlinear vibration of a clamped-clamped microbeam under discontinues electrostatic actuation. the electrostatic actuation was induced by applying ac-dc voltage between the microbeam and electrode plate. in contrast to previous works, it was assumed that length of the electrode plate was smaller than that of the microbeam. in additio...

Abstract Flood-induced scours near the pier foundation are an adverse phenomenon that may cause collapse of bridges. However, in seismic design bridges, scour impact is commonly ignored when evaluating response. This study aims to quantify effect flood-induced on nonlinear static and dynamic behaviors typical reinforced concrete For this regard, three-dimensional finite element models two- thre...

Bridges, as an essential part of transportation system, play a special role in economy, politic and military all around the world. Serviceability of bridges is of high importance especially in emergencies, helping injured people and proportioning transportation after earthquakes. Earthquake regulation codes, normally suggest linear methods to conduct the analysis, and nonlinear analysis is bare...

ABSTRAKPenggunaan bresing tahan tekuk dapat menjadi solusi atas kebutuhan struktur gempa di Indonesia. Disipasi energi pada elemen dilakukan melalui kinerja plastifikasi bagian inti akibat beban tarik dan tekan. Penelitian ini berisi kajian dari bangunan rangka baja beraturan dengan (BRB) variasi level ketinggian lantai yaitu 3 lantai, 8 15 lantai. Analisis 3D dua prosedur analisis modal pushov...

Well-known methods for seismic performance assessment, such as incremental dynamic analysis (IDA), multi-stripes (MSA) and the cloud method, involve nonlinear response time-history analyses to characterize relationship between chosen damage measure versus intensity measure. Over past two decades, many authors have proposed simplified procedures or static approaches develop fragility. In these p...

the aim of the present paper is to evaluate the influence of the soil- foundation- structure interaction (sfsi) effects on the component demand modifier factor of concrete gravity beams based on asce 41-06 standard. to this end, the beam on the nonlinear winkler foundation approach is employed which is a simple and efficient method. at first, four sets of 3-, 6-, 10- and 15-storey concrete mome...

in the current study the effect of casimir force and squeezed film damping on the pull-in instability and dynamic behavior of electrostatically actuated nano and micro electromechanical systems is investigated separately. linear elastic membrane theory is used to model the static and dynamic behavior of system for strip, annular and disk geometries. squeezed film damping effect is modeled using...

Masonry buildings are generally vulnerable to seismic action, as evidenced extensively in past earthquakes. In order improve their performance, several modifications have been introduced, such reinforcing or confining the masonry. This paper presents a analysis and fragility assessment procedure for non-engineered masonry building typologies, employing applied element method (AEM). Compared wit...

We revisit relational static analysis of numeric variables. Such analyses face two difficulties. First, even inexpensive relational domains scale too poorly to be practical for large code-bases. Second, to remain tractable they have extremely coarse handling of non-linear relations. In this paper, we introduce the subterm domain, a weakly relational abstract domain for inferring equivalences am...