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Article/eBook Full Name: Soil Mechanics
Author(s): Roberto Nova
Edition: 1st
Publish Date: 2010
ISBN: 1848211025
Published By: Wiley
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Despite a prolonged slump in the housing market, the demand for residential green building remains strong. More than ever, professionals need reliable information about how to construct or retrofit livable, sustainable, and economical homes. With Fundamentals of Sustainable Dwellings, Avi Friedman provides that resource. While other books on residential green building are often either superficial or overly technical, Friedman gets it just right, delivering an illustrated, accessible guide for architects, developers, home builders, codes officials, and students of architecture and green design.
Friedman charts a new course for residential building—one in which social, cultural, economic, and environmental values are part of every design decision. The book begins with a concise overview of green building principles, covering topics such as sustainable resources and common certification methods. Each following chapter examines a critical aspect of green home construction, from siting to waste management options. Friedman provides basics about energy-efficient windows and heating and cooling systems. And he offers innovative solutions like edible landscaping and green roofs.
Friedman knows that in green building, ideas are only as good as their execution. So in each chapter valuable data is assembled and a contemporary project in which designers strove to achieve sustainability while adhering to real-world constraints is featured. The result is a practical guide for every professional in the burgeoning field of residential green building.
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In this study, case study about excavation stabilised using anchors and
high pressure injectionis presented. The land of the project was located in the
northern zone of Tehran with shallow water table. Despite of dewatering operation,
the existence of groundwaterwas still a challenging issue concerning the construction
process.According to the pull-out tests, the gravity-grouted anchors could not satisfy
the design criteria. Therefore, the post-grouting method was employed to increase the
tensile capacity of anchors by enlarging the grout body of straight shafted gravity
grouted anchors. Finally, the loading tests were conducted and anchors locked-off at
75% of designed loads. It should be mentioned that the cast-in place concrete piles
were constructed around the excavation zone as the soldier beams. Satisfactory post
construction performance of this project proves the successful application of 3900 m
of ground anchors in 2800 m2 of excavation wall for this deep excavation.
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In anchor pullout design, conservative soil and rock shear strength parameters are usually adopted. Presumptive values of soil/grout and rock/grout bond strength are available in different design manuals. In this study, in-situ pullout test data for anchors in soil and rock type worldwide were collected from published sources and information provided by specialty wall contractors. The measured pullout test data were compared to estimated pullout resistance using the Post-Tensioning Institute (PTI) presumptive bond strength values. Statistical analysis was performed to determine the probability of success and the corresponding reliability indices using the minimum, average and maximum PTI ground/anchor bond strength values for cohesive soils, cohesionless soils and different rock types. A minimum safety factor of 2 recommended by the PTI to the ground/grout bond strength was found not conservative where the maximum presumptive bond strength values were used in clays and sands, and the average and the maximum presumptive bond strength values were used in rocks. Based on the results of this study, an average minimum factor of safety was recommended for ground/grout bond strength.
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I am looking for following Paper inside ASCE – Structures Conference 2008
Summers, P. (2008) Design of Modular Blast-Resistant Steel-Framed Buildings in Petrochemical Facilities. Structures Congress 2008: pp. 1-7.
doi: 10.1061/41016(314)177
Design of Modular Blast-Resistant Steel-Framed Buildings in Petrochemical Facilities
Article/eBook Full Name: Performance-Based Plastic Design: Earthquake-Resistant Steel Structures
Author(s): Subhash C. Goel, Shih-Ho Chao
Publish Date: 2008
ISBN: 1580017142
Published By: ICC
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Dynamic stability of cracked columns; the stiffness reduction method
Author: A. Ranjbarana, H. Rousta, M. Ranjbaran, M. Ranjbaran | Size: 890 KB | Format:PDF | Quality:Unspecified | Publisher: Sciencedirect/Elsevier | Year: 2013 | pages: 8
A new formulation for the dynamic stability of cracked columns is proposed. In this formulation,
a differential equation governing the free vibration of a cracked column subjected to compressive axial
force is derived. The solution of the proposed equation needs only the end conditions for its solution
(similar to that of intact beam columns). The equation is solved using the Laplace Transform. Both
conservative and non-conservative forces are considered. The closed form solution is then used in the
dynamic stability investigation of the cracked column with different boundary conditions. The accuracy,
efficiency and robustness of the work are verified through numerical examples.
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The thermalbucklingandpostbucklinganalysisoflaminatedcompositebeamswithtemperature-
dependentmaterialpropertiesispresented.Thegoverningequationsarebasedonthefirst-ordershear
deformationbeamtheory(FSDT)andthegeometricalnonlinearityismodeledusingGreen’sstrain
tensor inconjunctionwiththevonKarmanassumptions.Thedifferentialquadraturemethod(DQM)as
an accurate,simpleandcomputationallyefficientnumericaltoolisadoptedtodiscretizethegoverning
equationsandtherelatedboundaryconditions.Adirectiterativemethodisemployedtoobtainthe
criticaltemperature(bifurcationpoint)aswellasthenonlinearequilibriumpath(thepostbuckling
behavior)ofsymmetricallylaminatedbeams.Theapplicability,rapidrateofconvergenceandhigh
accuracy ofthemethodareestablishedviadifferentexamplesandbycomparingtheresultswiththose
of existinginliterature.Then,theeffectsoftemperaturedependenceofthematerialproperties,
boundaryconditions,length-to-thicknessratios,numberoflayersandplyangleonthethermal
bucklingandpostbucklingcharacteristicofsymmetricallylaminatedbeamsareinvestigated.
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A high performance fibre-reinforced
cementitious composite (HPFRCC) material is developed
to be used for retrofitting reinforced concrete
members. It can be applied to the face of a concrete
member to the desired thickness as a wet mix or as an
adhesively-bonded prefabricated slab or strip. The
material is compatible with concrete and possesses
favourable strength and ductility properties, desirable
for seismic retrofit. It overcomes some of the problems
associated with the current techniques based on
externally bonded steel plates and fibre-reinforced
polymer (FRP) laminates caused mainly by the
mismatch of their tensile strength and stiffness with
that of the concrete member being retrofitted. An
extensive rheological analysis is undertaken to
develop the appropriate mixes using different types
and mix proportions of constituent materials including;
fine steel fibres, fine quartz sand, silica fume,
cement and superplasticizer. Much reduced amounts
of steel fibres are used compared to the previous
studies so that ordinary mixing procedures could be
applied and a more cost-effective retrofitting material
could be developed. Samples made of the optimum
mixes are shown to posses very high compressive and
tensile strengths and sufficient ductility for the composite
plaster to be used externally for strengthening
and seismic retrofitting of concrete members.
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This study presents the investigation of the approach which was presented by Thaer M. Saeed Alrudaini
to provide the alternate load path to redistribute residual loads and preventing from the potential progressive collapse of
RC buildings. It was proposed to transfer the residual loads upwards above the failed column of RC buildings by vertical
cables hanged at the top to a hat steel braced frame seated on top of the building which in turn redistributes the residual
loads to the adjacent columns. In this study a ten-storey regular structural building has been considered to investigate
progressive collapse potential. Structural design is based on ACI 318-08 concrete building code for special RC frames and
the nonlinear dynamic analysis is carried out using SAP2000 software, following UFC4-023-03 document. Nine
independent failure scenarios are adopted in the investigation, including six external removal cases in different floors and
three removal cases in the first floor. A new detail is proposed by using barrel and wedge to improve residual forces
transfer to the cables after removal of the columns. Simulation results show that progressive collapse of building that
resulted from potential failure of columns located in floors can be efficiently resisted by using this method
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