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Title: 高温時におけるPCストランドの力学的性状のモデル化に関する研究
Other Titles: MODELING MECHANICAL PROPERTIES OF PRESTRESSING STEEL STRAND AT ELEVATED TEMPERATURE
Authors: 林, 成俊  KAKEN_name
西山, 峰広  kyouindb  KAKEN_id
原田, 和典  KAKEN_name
谷, 昌典  kyouindb  KAKEN_id
Author's alias: LIM, Sungjun
NISHIYAMA, Minehiro
HARADA, Kazunori
TANI, Masanori
Keywords: Prestress
Prestressing steel strand
Creep
Fire
Deflection
Stress-strain relationship
Relaxation
プレストレス
PCストランド
クリープ
火災
たわみ
リラクセーション
Issue Date: Mar-2011
Publisher: 一般社団法人日本建築学会
Journal title: 日本建築学会構造系論文集
Volume: 76
Issue: 661
Start page: 639
End page: 647
Abstract: The purpose of this paper is to model mechanical properties of prestressing strand at elevated temperature for estimating the strength and deflection of prestressed concrete members during fire and/or after fire. Prestressing strands(SWPR7BL) of 12.7 mm in diameter were used as test coupons. Tensile tests on prestressing strands at elevated temperatures were conducted to investigate mechanical properties such as yield strength, Young's modulus and creep strain. Reduction in yield strength, Young's modulus and stress-strain curves at elevated temperature were formulated. Creep tests were conducted on prestressing strands. The initial stress applied was 70% of the yield strength. The maximum creep strain was as large as 545 microns at 250°C. Creep behavior of presstressing strands was approximated by a numerical formula proposed by Norton and Bailey. Using the formula together with time-hardening rule, an estimation method of relaxation of prestressing steel at high temperatures was proposed.
Description: Transactions of AIJ. Journal of structural and construction engineering
Rights: ©日本建築学会
本文データは学協会の許諾に基づき登録したものである
著者の承諾を受け、登録したものである
URI: http://hdl.handle.net/2433/189221
Appears in Collections:Journal Articles

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