玻璃纖維包覆金屬螺紋管圍束混凝土之軸壓試驗與力學模型

Axial Behavior and Test of Concrete-Filled Spiral Corrugated Steel Tubes Wrapped with Glass Fiber Reinforced Polymer

李中生(Chung-Sheng Lee) ； 周中哲(Chung-Che Chou) ； 譚皓翔(Hao-Hsiang Tan) ； 陳威霖(V-Liam Chin)

《結構工程》 35卷1期 (2020/03) Pp. 52-77

https://doi.org/10.6849/SE.202003_35(1).0003

摘要

本文探討新發展之玻璃纖維包覆金屬螺紋鋼管圍束混凝土軸壓試驗結果與力學模型，此複合式圍束管的組成是以螺紋鋼管做為模具，於螺紋管外的凹槽中纏繞玻璃纖維紗束，形成環肋式加勁，再以預浸玻璃纖維布包覆加勁金屬螺紋管。本研究共進行36組圍束混凝土軸壓試驗，其中包含不同之圍束與斷面形式，目的為探討在不同圍束條件下之混凝土行為，以及混凝土圓柱中空斷面對於圍束效果的影響。本研究將中空斷面以面積比形式分成圍束與未圍束區域，利用試驗結果回歸出面積比與軸應變的關係式，利用所提出的面積比公式，可預測圍束中空混凝土圓柱的軸壓行為。

關鍵字

螺紋鋼管 ； 玻璃纖維 ； 圍束混凝土 ； 軸壓試驗

並列摘要

This paper presents the axial behavior of concrete cylinders confined by a novel composite tube. This composite tube consists of a spiral corrugated steel tube and Glass Fiber Reinforced Polymer (GFRP) shell. The spiral corrugated steel tube serves as a mold for wrapping GFRP shell. The concave area of spiral corrugated tube are filled with pre-preg fiber strands and epoxy resins to form an enhanced flat tube, and a multilayer GFRP jacket are wrapped around the enhanced steel tube. Thirty-six cylinder specimens were designed and tested under uniaxial compression. The test parameters included different types of confinement tube and cross section. This paper proposes an analytical method to predict the axial behavior of concrete filled GFRP-wrapped spiral corrugated tube, and a calculation method for the ratio of effective confined area to predict the axial behavior of hollow section specimens.

並列關鍵字

Steel Corrugated Tube ； Glass Fiber Reinforced Polymer (GFRP) ； Confined Concrete ； Axial Compression