FE analysis of short- and long-term behavior of simply supported slender prestressed concrete columns under eccentric end axial loads causing uniaxial bending

2015 ◽  
Vol 85 ◽  
pp. 52-62 ◽  
Author(s):  
Tiejiong Lou ◽  
Sergio M.R. Lopes ◽  
Adelino V. Lopes
Keyword(s):  
Prestressed Concrete ◽  
Concrete Columns ◽  
Fe Analysis ◽  
Axial Loads ◽  
Simply Supported ◽  
Short And Long Term ◽  
Long Term Behavior

scholarly journals Ubiquitous C IV 1550 Variability in B and Be Stars

1987 ◽  
Vol 92 ◽  
pp. 286-288 ◽  
Author(s):  
G. Sonneborn ◽  
M.P. Garhart ◽  
C.A. Grady
Keyword(s):  
Time Scale ◽  
High Dispersion ◽  
Be Stars ◽  
Line Profiles ◽  
Standard Star ◽  
B Stars ◽  
Short And Long Term ◽  
Resonance Transitions ◽  
Long Term Behavior

Studies of line profile variability of the ultraviolet 1550 Angstrom resonance transitions of C IV in Be stars (Sonneborn et al. 1986; Grady, et al. 1986a,b) have prompted an investigation into the short- and long-term behavior of the C IV lines in other types of B stars. We present examples of two well-studied Be stars, Omega Orionis and 66 Ophiuchi, and two non-Be stars, Beta Cephei and the standard star Zeta Cassiopeiae. Zeta Cas is also known to be a 53 Per variable (see Cox 1983). The IUE SWP high-dispersion spectra of Beta Cep and Zeta Cas have been obtained from the IUE archives. It has been known for some years that the C IV line profiles in Beta Cep vary in a time scale of several days (Fishel and Sparks, 1980). However, it came as a surprise to discover C IV variability in Zeta Cas. Available data allow us to set an upper limit of several months for the time scale of Zeta Cas C IV variability. The principal difference between the C IV variability in Be and non-Be stars appears to be the magnitude and velocity range of the effect.

Failure of a Test Embankment On a Sensitive Champlain Clay Deposit

1974 ◽  
Vol 11 (1) ◽  
pp. 142-164 ◽  
Author(s):  
P. La Rochelle ◽  
B. Trak ◽  
F. Tavenas ◽  
M. Roy
Keyword(s):  
Research Program ◽  
Factor Of Safety ◽  
Soft Clay ◽  
New Approach ◽  
Short And Long Term ◽  
Undrained Strength ◽  
The Stability ◽  
Long Term Behavior ◽  
Test Embankment

The present paper reports on the failure of a test embankment built on a soft, sensitive, and cemented clay in Saint-Alban, Quebec. The embankment was built as a first stage of a research program aimed at studying the short and long term behavior of embankments on soft clay foundations.A complete description of the embankment, of the instrumentation, and of the failure is given, followed by the analysis of the failure performed on the basis of different assumptions of fill behavior and of vane strength values mobilized in the clay crust. The analyses show that the assumptions of full mobilization of friction in the fill seems to be the most representative of the fill behavior in the present case and that a suitable factor of safety is obtained only when a reduction of vane strength is assumed to act in the crust.A new approach based on the residual undrained strength is suggested and seems to offer some potential as a valuable means of analyzing the stability of embankments on clay foundations.

scholarly journals DEFORMATIONAL ANALYSIS OF PRESTRESSED HIGH‐STRENGTH CONCRETE MEMBERS USING FLEXURAL CONSTITUTIVE MODEL

2005 ◽  
Vol 11 (2) ◽  
pp. 145-151
Author(s):  
Renata Zamblauskaitė ◽  
Gintaris Kaklauskas ◽  
Darius Bačinskas
Keyword(s):  
Constitutive Model ◽  
Prestressed Concrete ◽  
Linear Time ◽  
High Strength ◽  
Concrete Members ◽  
Calculation Technique ◽  
Short And Long Term ◽  
Modulus Method ◽  
Creep And Shrinkage

In this paper, an attempt has been made to extend application of the recently proposed Flexural constitutive model to short‐ and long‐term deformational analysis of flexural partially prestressed concrete members. The effect of tension stiffening and non‐linear time effects of creep and shrinkage are taken into account. Effective modulus method is used for modelling long‐term deformations. The proposed calculation technique is based on the layered approach and use of material stress‐strain relationships. Curvatures prediction results were tested against experimental data of partially prestressed concrete beams reported in literature.

The effect of annealing on the short and long term behavior of PEEK

1990 ◽  
Vol 24 (6) ◽  
pp. 657-664 ◽  
Author(s):  
P. Y. Jar ◽  
H. H. Kausch ◽  
W. J. Cantwell ◽  
P. Davies ◽  
H. Richard
Keyword(s):  
Short And Long Term ◽  
Long Term Behavior

(Invited) Sulfur Poisoning of Ni-Based SOFC-Anodes – Short and Long Term Behavior

2017 ◽  
Vol 77 (10) ◽  
pp. 141-147 ◽  
Author(s):  
André Weber ◽  
Sebastian Dierickx ◽  
Niklas Russner ◽  
Ellen Ivers-Tiffée
Keyword(s):  
Sulfur Poisoning ◽  
Short And Long Term ◽  
Long Term Behavior

scholarly journals Effect of Strain Hardening and Rate Sensitivity on the Dynamic Growth of a Void in a Plastic Material

1992 ◽  
Vol 59 (1) ◽  
pp. 48-53 ◽  
Author(s):  
M. Ortiz ◽  
A. Molinari
Keyword(s):  
Strain Hardening ◽  
Plastic Material ◽  
Rate Sensitivity ◽  
Spherical Void ◽  
Hydrostatic Tension ◽  
The Matrix ◽  
Short And Long Term ◽  
Dynamic Growth ◽  
Long Term Behavior

The problem studied in this paper concerns the dynamic expansion of a spherical void in an unbounded solid under the action of remote hydrostatic tension. The void is assumed to remain spherical throughout the deformation and the matrix to be incompressible. The effects of inertia, strain hardening, and rate sensitivity on the short and long-term behavior of the void, as well as on its response to ramp loading, are investigated in detail.

scholarly journals Sofosbuvir protects Zika virus-infected mice from mortality, preventing short- and long-term sequela

2017 ◽  
Author(s):  
André C. Ferreira ◽  
Camila Z. Valle ◽  
Patricia A. Reis ◽  
Giselle Barbosa-Lima ◽  
Yasmine Rangel Vieira ◽  
...  
Keyword(s):  
Zika Virus ◽  
Neurological Disorders ◽  
Health Concern ◽  
Virus Challenge ◽  
Significant Public Health Concern ◽  
Significant Public Health ◽  
Short And Long Term ◽  
Long Term Behavior

ABSTRACTZika virus (ZIKV) caused significant public health concern, because of its association with congenital malformations, neurological disorders in adults and, more recently, with deaths. Considering the necessity to mitigate the cases ZIKV-associated diseases, antiviral interventions against this virus are an urgent necessity. Sofosbuvir, a drug in clinical use against Hepatitis C Virus (HCV), is among the FDA-approved substances endowed with anti-ZIKV activity. In this work, we further investigated the in vivo activity of sofosbuvir against ZIKV. Neonatal Swiss mice were infected with ZIKV (2 x 107 PFU) and treated with sofosbuvir at 20 mg/kg/day, a concentration compatible with pre-clinical development of this drug. We found that sofosbuvir reduced acute levels of ZIKV from 60 to 90 % in different anatomical compartments, such as in blood plasma, spleen, kidney and brain. Early treatment with sofosbuvir doubled the percentage and time of survival of ZIKV-infected animals, despite the aggressive virus challenge assayed and also prevented the acute neuromotor impairment triggered by the virus. On the long-term behavior analysis of ZIKV-associated sequelae, sofosbuvir prevented loss of hippocampal- and amygdala-dependent memory. Our results point out that sofosbuvir inhibits ZIKV replication in vivo, which is consistent with the prospective necessity of antiviral drugs to treat ZIKV-infected individuals.

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