It has recently been suggested that all giant stars with mass below 2 $M_{\odot}$ suffer an episode of surface lithium enrichment between the tip red branch (RGB) and clump (RC). We test if above result can be confirmed in a sample RC RGB are members open clusters. discuss Li abundances six clusters ages 1.5 4.9 Gyr (turn-off masses 1.1 1.7 $M_{\odot}$). These observations compared predictions ...

Seismic pressures on a reinforced concrete moment-resisting structure are known to create critical and essential regions at the beam-column joints. Beam-column junctions microcosm of whole structure, therefore brittle behavior these points predicts action. Ductile joints ductile Under influence seismic forces, between RC beams columns exposed high shear stresses. Learn more about performance fi...

The existing connection between the concrete-filled double steel tubular (CFDST) column and reinforced concrete (RC) beam is difficult to repair reuse after damage. In this paper, a self-centering joint CFDST RC proposed. of realized by prestressed strands, energy dissipation friction. overall purpose research analyze influence strand friction on mechanical behavior joint. By comparing envelope...

In this study, it is aimed to investigate the seismic performance of a reinforced concrete (RC) structural system exposed high temperatures. For purpose, RC structure with 4 floors and spacings was designed. First all, column beam elements were modeled by using ANSYS software then, thermal analysis performed assuming that they standard fire curve obtain temperature distributions in cross-sectio...

The distribution of stiffness, strength, and mass in both vertical horizontal orientations affects how well a high rise structure performs during powerful earthquake events. A building is considered irregular if there difference between the adjoining storeys. performance behavior regular G+10 reinforced concrete (RC) buildings under seismic loading are main topics current study. In this study, ...

The present study investigates the seismic performance of twelve-story RC buildings focusing on structural effects flat walls which are commonly neglected in design practice. Two-span moment-resisting frame was numerically modeled considering three analytical cases: Case 0 beam-column subassembly, 1 with conventional walls, and 2 damage control were proposed authors’ previous study. Comparing m...

This work has explored interface evolution and pinch-off mechanism of the droplet formation in two-phase flow through cross-flow microfluidic device. The two-dimensional mathematical model equations have been solved using finite element method under squeezing regime (Cac< 10?2) for wide range rates (0.1 ? Qr 10) fixed contact angle (? = 135°). process classified into various instantaneous stage...