Carried out a laboratory experiment in order kinetics study of adsorption
of cadmium and lead in the soil, using soil columns experiment, with the
use of concentration 26.25 mg / l for cadmium, and 27.81 mg / l for lead,
and two degrees of pH 5.5, 0.7, with the use of five parameters.
This research deals with analytical study of exterior Beam-Column
connections behavior under seismic load.
Tow parameters were considered: axial load on the column and
confinement of joint region with stirrups.
Ansys program was used to analytica
l study of three types of exterior
Beam-Column connections under cyclic load.
The results were shown a good agreement with general behavior of
three types.
The analytical results indicate that the tow parameters will improve
the behavior of the connections delay cracking at joint core and
increasing connection stiffness in rotation and displacement with
decreasing shear value at joint.
This research paper revolves around studding the repairing of reinforced concrete
columns which are subjected to an axial compression load, by using ferrocement jackets
containing two layers of Welded Wire Meshes (WWMs), which are in turn encapsula
ted in
high strength mortar.
The experiments were carried out at the concrete lab in the faculty of civil engineering,
Damascus University. The results were analyzed in order to determine the effects of
repairing technique on Ultimate Compressive Strength, Ductility of the Column and Failure
Modes. Empirical results confirmed the efficiency of using locally available welded
wire meshes in repairing of reinforced concrete columns.
Our subject contains studying criterions which ensuring a durable serving of concrete
frame joints, and then choosing two connections according to its deployment and the
availability of its arithmetic relations and easy to be prepared from local ma
terials, and
discuss experimental results of the resent study which allow us to achieve the next part of
our research,which is a structural designing programme by visual basic language to serve
the work in order to be fast and precise.
the last part of the subject is comprising a number of actualizations which confirm
that the process of programming is correct, and then compare the results of experimental
programs and code with our programme results to achieve many important ameliorations
on this programme to become more easily and better.
In this study the concentration of (Cu, Cr, Cd, Fe, Mn, Ni, Zn , Pb ,V &Co) in
some sedimentary columns and pore-water extracted from the estuary of Al-Kabeer
alshemali river was determined during four seasons .the concentrations of these metals
w
ere determined using atomic absorption spectroscopy (AAS). The columns were cut into
slices with 2cm of thickness ,the pore water at every slice was extracted using
centrifugation (7000 r/min).the results showed that the concentration increased from
surface(deep=0cm, rich of O2) up to the 4cm of deep ,then the concentration decreased in
deeper slices (down of 4cm,deficiency of O2) and the concentration of Fe and Mn from
high ranking ppm. The rest of the items were relatively lower ranking ppb, but Co, Cd and
V were low. meat increased the concentration of all these elements in the spring and
summer, compared with the values in the winter and autumn, due to increasing human
activities on the one hand and the high temperature on the other hand, leading to increased
activities of bacterial that leads to the decomposition of organic material that may increase
the ratios of these elements in the pore water.
Multichannel Analysis of Surface Waves (MASW) is increasingly applied in
earthquake engineering and geotechnical problems, because of simple field
procedures, time and cost saving. It can allow for maximum areal coverage,
thus reduces the number o
f needed boreholes.
This study illustrates the importance of the use of active and passive MASW
to measure the average shear wave velocities of the upper surface layers (upper
30m) of the city of Irbid in North Jordan by integrating the outputs of the
active and passive approaches, and by investigating the relationship between
the estimated average shear wave velocity with the following geotechnical
variables, Bearing capacity, depth of embedment, and soil thickness.
