Load Rating of Post-Tensioned Cast-in-place Concrete Segmental...
Transcript of Load Rating of Post-Tensioned Cast-in-place Concrete Segmental...
![Page 1: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/1.jpg)
Load Rating of Post-Tensioned
Cast-in-place Concrete Segmental
Bridge
Ken Lee and Nyssa Beach
![Page 2: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/2.jpg)
H-09-U: SH 82 over Maroon Creek, Aspen CO
Buttermilk Ski ResortH-09-U
![Page 3: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/3.jpg)
Project Overview – CDOT Load Rating
• First of two task orders to rate Colorado structures
that are either missing load ratings or in need of
updated load ratings.
• 20 structures rated in the first task order
• Load ratings included:– Cast-in-place post tensioned segmental structure (Maroon Creek – Midas)
– 10-span curved welded plate steel girder (AASHTOWare BrR)
– Multi-cell cast-in-place post tensioned box girder (AASHTOWare BrR)
– 8-span spliced post-tensioned concrete U-girder (Bentley Consplice)
– 3-span welded plate girder steel slant leg (Midas)
– Concrete Arch Culvert (SAP2000)
![Page 4: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/4.jpg)
Bridge Overview – Maroon Creek Bridge
![Page 5: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/5.jpg)
Bridge Overview – Maroon Creek Bridge
Completed in 2005
3 Spans (170ft. – 270ft. – 170ft.)
Bridge width = 73’-0”
Typical Box Depth = 13’-6” along
Bridge Width = 73’-0”
Fully Integral at Piers
![Page 6: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/6.jpg)
Bridge Overview – Maroon Creek Bridge
![Page 7: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/7.jpg)
Bridge Overview – Maroon Creek Bridge
![Page 8: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/8.jpg)
Bridge Overview – Maroon Creek Bridge
![Page 9: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/9.jpg)
Bridge Overview – Maroon Creek Bridge
![Page 10: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/10.jpg)
Challenging aspects of Bridge Design
• Transverse and Longitudinal Analyses
• Construction Stages
• Time-dependent Behavior
• Interaction of Transverse Bending and Longitudinal
Shear in Webs
• Geometry
• Prevention of Substructure Flexural Crack
• Load Ratings
![Page 11: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/11.jpg)
Main Topics
• Longitudinal Analysis and Design
• Construction Stages
• Time-dependent Behaviors
• Load Ratings
![Page 12: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/12.jpg)
Modeling of Maroon Creek Bridge
Connectivity and BCs
![Page 13: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/13.jpg)
Modeling of Maroon Creek Bridge
Creep/Shrinkage: CEB-FIP (1978)
![Page 14: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/14.jpg)
Time-dependent Material and Behavior
Creep Coefficient
![Page 15: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/15.jpg)
Modeling of Maroon Creek Bridge
Tendon Profiles
![Page 16: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/16.jpg)
Modeling of Maroon Creek Bridge
Tendon Properties (low relaxation)
![Page 17: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/17.jpg)
Modeling of Maroon Creek Bridge
Jacking Force
![Page 18: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/18.jpg)
Modeling of Maroon Creek Bridge
17- Load Cases
![Page 19: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/19.jpg)
Load Combination
20 Load combinations
![Page 20: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/20.jpg)
Temperature and Structural Behavior
TG [AASHTO 3.12.3]
![Page 21: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/21.jpg)
Why Construction Stage Analysis is crucial?
M under Selfweight wo/ CS – 3 span continuous
M under Top PT w/ CS– Cantilevers and closure pour
![Page 22: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/22.jpg)
Why Construction Stage Analysis is crucial?
M under Top PT wo/ CS – Secondary PT included!!
M under Top PT w/ CS – No Secondary PT Effect
![Page 23: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/23.jpg)
Construction Stage Analysis- Total 11 CSs.
360days for Bridge Completion
![Page 24: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/24.jpg)
Construction Stage Analysis
Assign Groups to Each Construction Stage
![Page 25: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/25.jpg)
Construction Stage Analysis
![Page 26: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/26.jpg)
Construction Stage Analysis
360 days at Bridge Completion and 10 years for CR/SH
![Page 27: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/27.jpg)
Construction Stage Analysis
![Page 28: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/28.jpg)
Summation of CS
Summation of CS
Reaction
DL+ER+Secondary PT+Secondary CR+Secondary SH
Deformation
DL+ER+Primary PT+Primary CR+Primary SH
Force
DL+ER+Primary PT+Secondary PT+Secondary CR+
. Secondary CR
![Page 29: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/29.jpg)
Evaluation of Post-Analysis: Const. Stages
![Page 30: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/30.jpg)
Evaluation of Post-Analysis: After Completion
![Page 31: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/31.jpg)
Tendon Stress Limits
![Page 32: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/32.jpg)
Evaluation of Post-Analysis: Tendon Loss
![Page 33: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/33.jpg)
Midas Design Feature
Longitudinal Reinforcing
![Page 34: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/34.jpg)
Midas Design Feature
Shear and Torsional reinforcing
![Page 35: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/35.jpg)
Load Rating
Design Vehicles – HL93 / 9 Legal / CDOT Permit
Define Rating Cases
![Page 36: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/36.jpg)
Load Rating
Summary of Ratings in Strength
![Page 37: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/37.jpg)
Summary
• Load Rating = 1.3
• Construction Stage Analysis is crucial
• Verification of Behavior of Time-dependent material
• Evaluation of Post-Analysis
• Midas Design Features for Seg. PT Concrete Bridge
• Capability of Midas Load Rating for Seg. PT Concrete
Bridge
![Page 38: Load Rating of Post-Tensioned Cast-in-place Concrete Segmental …northamerica.midasuser.com/web/upload/sample/KenLee... · 2016. 3. 23. · Project Overview –CDOT Load Rating •](https://reader034.fdocuments.net/reader034/viewer/2022052012/6027d30c770c27184302b264/html5/thumbnails/38.jpg)
Acknowledgement