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Optimization Method and Experimental Study on the Shear Strength of Externally Prestressed Concrete Beams
- Source :
- Advances in Structural Engineering. 17:607-615
- Publication Year :
- 2014
- Publisher :
- SAGE Publications, 2014.
-
Abstract
- This paper presents a performance-based evolutionary topology optimization method for externally prestressed concrete(EPC) beams in automatically generating optimal strut-and-tie models using the finite element method. The concrete and steel bar elements with least contribution to the stiffness of the EPC beam are removed by calculating the element virtual strain energy. Load transfer mechanism of EPC beam is characterized by remaining elements. The optimal strut-and-tie model is determined from the topology history. A theoretical formula of the shear strength is derived from optimal strut-and-tie model for EPC beams. The model predicts possible modes of failure, which may be broadly classified into shear-type failure and flexural-type failure. 9 EPC beams were casted in place to evaluate the validation of the proposed method. The predictions of the method are compared with the 9 specimen and other available test results of EPC beams from literatures. Case studies are conducted and compared with the resul...
- Subjects :
- Engineering
business.industry
Topology optimization
0211 other engineering and technologies
Stiffness
020101 civil engineering
Topology (electrical circuits)
02 engineering and technology
Building and Construction
Structural engineering
Steel bar
Finite element method
0201 civil engineering
law.invention
Prestressed concrete
law
021105 building & construction
Shear strength
medicine
medicine.symptom
business
Beam (structure)
Civil and Structural Engineering
Subjects
Details
- ISSN :
- 20484011 and 13694332
- Volume :
- 17
- Database :
- OpenAIRE
- Journal :
- Advances in Structural Engineering
- Accession number :
- edsair.doi...........b0c1cad32258c3f220cd0883e2734220