Magazine of Civil Engineering,
№5(40), 2013
Building structures. Structural mechanics
STRUCTURES 
Search Subject plan for this halfyear 

A.S. Gorshkov, N.I. Vatin
The article presents
information on a test experiment for the construction of masonry
fragments made
of autoclaved cellular concrete products (ААС blocks) on the
polyurethane
adhesive and the ensuing structural, thermal and technological tests of
this
type of masonry in specialized laboratories and testing facilities. 

V.N. Derkach
It is shown that ignoring the joint action of stone
filling and skeleton can lead to excessive consumption of materials in
the
construction of monolithic reinforced concrete buildings, to the
additional
energy costs and higher prices of construction or, conversely, to an
unexpected
limit state of infilling and frame members. 

A.V. Alekseytsev
This article describes the process of
constructing a genetic parametricaloptimization algorithm of trusses
with the
possibility of account the cost of manufacturing the nodal joints of
rods.
Accounting nodal joints in the process of parametric design synthesis
will
allow finding bearing systems with rational cost of their production. 

M. Al Ali, M. Tomko, M. Badak
The paper is divided into two parts. Part 1
presents fundamental information about experimentaltheoretical
research
oriented to determinate the resistance of thinwalled compressed steel
members.
The investigated members had closed crosssections made from
homogeneous
materials. 

T.V. Nazmeeva
The main aim of the investigations was to receive a reliable
engineering
methodology of their calculation. The author developed the testing
methodology and designed two test beds
С12 (1200mm/20t) and В50 (2200mm/50t) to perform the experimental
investigation. Numerical solution for stability of thinwalled member
made of
Cshaped profile was received during the numerical simulation done in
PLM Femap
10.1 Nastran. 

ANALYSIS  
M.N. Kirsanov, T.M. Andreyevskaya
The analytical solution
for the forces in the spatial truss rods for an arbitrary number of
horizontal
contours, and the expression for the deflection under the assumption
that the
angles of deviation from the vertical of struts are small, are given.
The
resulting approximate and exact analytical solutions for the deflection
under
the action of horizontal load allow optimization of the construction. 

M.M. Mirsaidov, T.Z. Sultanov, Sh.A.
Sadullaev
Mathematical statement,
methods and algorithms of assessment of stressstrain state of earth
dams with
account of elasticplastic, moist properties of soil and finite strain,
structural heterogeneity of structures under static effects, are
presented in
the paper. Stressstrain state of three erected structurally
heterogeneous
earth dams of different heights was studied with account of
elasticplastic,
moist properties of soil and large strains in a structure. 

CALCULATIONS  

V.S. Utkin
The new method of the reliability calculation of
buildings and structures’ earth foundations based on limited
statistical
information on controlled parameters in the operation stage is
considered. The
reliability is calculated by criterion of foundation deformations
(settlement)
in the presence of load eccentricity of the foundation and using
possibility
distribution functions for the description of fuzzy variables. 

G.S. Kolosova, V.V. Lalin, A.V.
Kolosova
The aim of the paper was to review the
stressstrain state of an archgravity dam of the SayanoShushenskaya
HPP,
which has construction and contact joints. The problem is solved by
finite
element method using software package SOFiSTiK. The finite element
model of the "dam –
foundation – abutments" is described. 

A.V.
Benin, A.S.
Semenov, S.G.
Semenov, B.E.
Melnikov
The nonlinear finiteelement solutions of the
problem of pulling the reinforcing bar from the concrete block have
been
obtained with using various models of bond behavior and concrete
cracking. The
comparison of obtained numerical results with experimental data has
been
presented and discussed. The first part of the article is devoted to
the
models taking into account the discontinuity of the connection, while
the
second part is concerned with the models without explicitly taking into
account
of discontinuities. 

METHODS  
V.V.
Karpov, A.A.
Semenov
The paper presents the mathematical model of
deformation of thin orthotropic shells of revolution, based on the
model of
Timoshenko – Reissner. The model takes into account the
design of reinforcement
with the shear and torsional stiffness of the ribs, geometric
nonlinearity and
also the irregular shape of the shell. 

N.V. Kovaleva, Yu.L.
Rutman, G.V.
Davydova
Optimization criteria for damping parameters of
seismic isolation systems within the stochastic problem definition have
been
stated in the article. Search methods of optimal parameters for various
tasks
descriptions (target functions) have been developed. Both synthesized
accelerograms and real accelerograms of earthquakes have been used as
external actions.
Both linear and nonlinear damping model including seismic isolation
system have
been taken into consideration. 

S.Yu.
Fialko
The efficiency of block substructure multifrontal
method BSMFM, PARFES (Parallel Finite Element Solver), proposed
iterative
method PSICCG (Parallel Sparse Incomplete Cholesky Conjugate Gradient)
and
conventional ICCG0 method are compared. 