الفهرس 
LITERATURE SURVEY
Balanced Cantilever Construction MethodOnly 14 pages are availabe for public view
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Abstract
ABSTRACT
Externally prestressed concrete segmental girders provide appropriate
structural alternative in several construction applications. Although the
ontology of prestressing was inspired by imposing external compressive
force to piecewise components, the epistemology of externally prestressed
segmental girders is relatively limited. Construction practice, rules of thumb
and empirical formulas delineated the broad outlines of analysis and design
procedure. The present research provides in-depth study to highlight the
salient features of such important elements. Experimental, numerical
simulation and analytical program have been implemented with total of
forty two case study. Nonlinear finite element modeling was developed and
verified. Monolithically cast specimens were investigated against segmental
beams with different initial prestressing, various shear span to depth ratio,
several cable profiles and a variety of segmental joints configurations with
and without strand deviators. Innovative solutions were proposed for
segments connectivity enhancement. Loads at several levels were
determined including balanced, full prestressing, cracking, yield and
ultimate states. Cracking pattern, failure mechanism, deformed shape, strain
vectors, stress contours, strand eccentricity shift, incremental strand strain
development, load-deflection relationships and load sharing between
internal bonded reinforcement and external prestressing strand were among
the parameters considered for shear span to depth ratio ranging from 2 to
4.38 besides initial prestressing strain ranging from 26% to 60% of the
ultimate strand strain. Scrutiny of the results indicated a logical behavior
hierarchy for segmental girders, thus inspiring application of the nations of
fracture besides continuous damage mechanics to propose relevant