Strength and Behavior of Two-Span Continious Pretensioned Concrete BEAMS . . . . . . . . . . . . . . .

10.14359/7455 ◽  
1968 ◽  
Vol 65 (1) ◽  
Keyword(s):  
Concrete Beams ◽  
Pretensioned Concrete ◽  
And Behavior

High-cycle fatigue tests of pretensioned concrete beams

PCI Journal ◽  
2022 ◽  
Vol 67 (1) ◽  
Author(s):  
Jörn Remitz ◽  
Martin Empelmann
Keyword(s):  
Fatigue Life ◽  
High Cycle Fatigue ◽  
Concrete Beams ◽  
Fatigue Behavior ◽  
Fatigue Tests ◽  
Design Methods ◽  
Test Results ◽  
Cycle Fatigue ◽  
Pretensioned Concrete ◽  
Current Design

Pretensioned concrete beams are widely used as bridge girders for simply supported bridges. Understanding the fatigue behavior of such beams is very important for design and construction to prevent fatigue failure. The fatigue behavior of pretensioned concrete beams is mainly influenced by the fatigue of the prestressing strands. The evaluation of previous test results from the literature indicated a reduced fatigue life in the long-life region compared with current design methods and specifications. Therefore, nine additional high-cycle fatigue tests were conducted on pretensioned concrete beams with strand stress ranges of about 100 MPa (14.5 ksi). The test results confirmed that current design methods and specifications overestimate the fatigue life of embedded strands in pretensioned concrete beams.

Prestress losses in pretensioned concrete beams cast with lightweight self-consolidating concrete

Structures ◽  
2015 ◽  
Vol 2 ◽  
pp. 50-57 ◽  
Author(s):  
Jared C. Bymaster ◽  
Canh N. Dang ◽  
Royce W. Floyd ◽  
W. Micah Hale
Keyword(s):  
Concrete Beams ◽  
Prestress Losses ◽  
Self Consolidating Concrete ◽  
Pretensioned Concrete

Flexural behaviour of pretensioned concrete beams with limited prestress

1973 ◽  
Vol 8 (2) ◽  
pp. 179-185 ◽  
Author(s):  
N. Krishna Raju ◽  
B.S. Basavarajaiah ◽  
U.C. Ahamed Kutty
Keyword(s):  
Concrete Beams ◽  
Flexural Behaviour ◽  
Pretensioned Concrete

scholarly journals Structural Behavior of Continuous Steel-Reactive Powder Concrete Composiate Beams Under Repeated Loads

2018 ◽  
Vol 7 (4.19) ◽  
pp. 843
Author(s):  
Rasha Yassien Dakhil ◽  
Mustafa B. Dawood
Keyword(s):  
Ultimate Load ◽  
Concrete Beams ◽  
Numerical Models ◽  
Experimental Tests ◽  
Reactive Powder Concrete ◽  
Mode Of Failure ◽  
Reactive Powder ◽  
And Behavior ◽  
Push Out ◽  
Repeated Loads

A study for the continuous composite steel-reactive powder concrete beams under repeated loads were executed experimentally and analytically. In the experimental part, six continuous composite sections were constructed as test beams. "The‘“decks slab concretes"was connected tos steel I-beams by headed steel studs welded to the top flanges“ofs“thes‘‘steel I-beams.“T,he dimensions“ of “the“ deck slab is (2200×250×80mm), while the type of I-beam is (IPE 140) with length of (2200mm). For the present work, the experimental work includes also examining the shear in the links by creating two models (push out) and tested to determine the properties and behavior of the studs. The behavior of the studs were conducted by"getting load-slip curves. In the part of the,oretical,‘‘.tested beams.was numericallysmodeled then analyzed using thesfinite element method.‘“Thes“numerical models were carried out in three dimensionss bys“the software package (ANSYS 16.1). Verifi,cationsof thesnumericalsresults“was donesbyscompari,ngs thems with the experimentals results. “Thesresultssof thesfiniteselementsanalysissshowed good agreements‘with the results ofsthe experimental tests. The maximumsandsminimum difference‘‘in ultimate loa,ds for beams‘‘ were (5.85% and 1.33%) respectively.  The results show that stiffenerssof beamssandsstrengthening with CFRP shall increase the ultimate load capacity‘and affects on‘‘mode of failure“ of theses beams.‘  

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