Proposal of an Equation of Stress in PS Strands at Flexural Strength
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Bibliographic Details
| Author(s): |
Jae-Hyun Park
(Seoul National University, Seoul, South Korea)
Jae-Yeol Cho (Seoul National University, Seoul, South Korea) Hyun-Moo Koh (Seoul National University, Seoul, South Korea) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Congress: Challenges in Design and Construction of an Innovative and Sustainable Built Environment, Stockholm, Sweden, 21-23 September 2016 | ||||
| Published in: | IABSE Congress Stockholm, 2016 | ||||
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| Page(s): | 2147-2154 | ||||
| Total no. of pages: | 8 | ||||
| Year: | 2016 | ||||
| DOI: | 10.2749/stockholm.2016.2155 | ||||
| Abstract: |
The PS strand which has a tensile strength of 1,860 MPa was commercialized in the 1980s, and the tensile strength of strand had not been increased for about the past 30 years. Recently, 2,160 MPa and 2,400 MPa high-strength PS strands were developed by Korea government in 2008 and 2011, respectively. Also, net tensile strain concept has been introduced in recent version of ACI 318. However, simple equations for designers to predict the stress in PS strands at flexural strength proposed at existing design codes such as ACI 318 and CSA A23.3 do not reflect the influence of these trends. This study examined the applicability of high-strength PS strands to existing design equations of stresses in PS strands at flexural strength proposed in ACI 318-14 and CSA A23.3-14. The results show that the existing equations over-estimate the stresses for flanged sections and high-strength PS strands. With the based on the results, modified equation was proposed. |
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| Keywords: |
flexural strength PS strand stress high-strength PS strands
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