Statistical characteristics of sustained wind environment for a long-span bridge based on long-term field measurement data

2013 ◽  
Vol 17 (1) ◽  
pp. 43-68 ◽  
Author(s):  
Youliang Ding ◽  
Guangdong Zhou ◽  
Aiqun Li ◽  
Yang Deng
Keyword(s):  
Field Measurement ◽  
Measurement Data ◽  
Statistical Characteristics ◽  
Wind Environment ◽  
Long Span ◽  
Long Span Bridge ◽  
Term Field

scholarly journals LONG TERM FIELD-MEASUREMENT SURVEY ON FORMALDEHYDE AND VOLATILE ORGANIC COMPOUNDS IN RESIDENCES

2002 ◽  
Vol 67 (552) ◽  
pp. 29-35 ◽  
Author(s):  
Michiyo AZUMA ◽  
Megumi NIIYA ◽  
Fusae YAGI ◽  
Yoshifumi MORIYA ◽  
Yoko HIKITA
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Field Measurement ◽  
Volatile Organic ◽  
Term Field

scholarly journals LONG-TERM FIELD MEASUREMENT ON HEAT TRANSFER COEFFICIENT AND HEAT BALANCE ON GRASSLAND SURFACE

2000 ◽  
Vol 6 (11) ◽  
pp. 155-159 ◽  
Author(s):  
Aya HAGISHIMA ◽  
Jun TANIMOTO ◽  
Tadahisa KATAYAMA ◽  
Takashi NISHIYAMA
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Heat Balance ◽  
Field Measurement ◽  
Term Field

Incorporation of Stress Time Dependence into Failure Projection Modeling of Corroding Bridge Post-Tensioning Tendons

CORROSION ◽  
10.5006/3607 ◽  
2020 ◽  
Vol 76 (11) ◽  
pp. 1088-1091
Author(s):  
William H. Hartt ◽  
Teddy S. Theryo
Keyword(s):  
Time Dependence ◽  
Analytical Modeling ◽  
Initial Value ◽  
Long Span ◽  
Long Span Bridge ◽  
Bridge Structures ◽  
Post Tensioning ◽  
Wire Strand ◽  
Creep And Shrinkage

Post-tensioning (PT) has evolved to become an important technology for designing long span bridge structures. However, tendon failures resulting from wire/strand corrosion have been reported as early as 2 y post construction. In response to this, a recent study introduced and evaluated an analytical modeling approach that projects corrosion-induced wire and strand fractures and tendon failures, given statistics that characterize wire corrosion rate. This past modeling effort assumed that tensile stress in tendons was constant with time at 63% of the guaranteed ultimate tensile strength (GUTS); however, in actuality this stress decreases with time over an assumed 10,000 d (approximately 27 y) from an initial value of about 70% of GUTS to a long-term value in the range 60% to 63% of ultimate at mid-span for a simply supported beam as a consequence of long-term concrete creep and shrinkage and strand relaxation. The present study builds upon this model by incorporating this time dependence of tendon stress into the failure projection modeling. Results are discussed within the context of better understanding bridge tendon integrity issues and corrosion related failure concerns.

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