LNG储罐混凝土外罐环向预应力筋的张拉顺序
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摘要
以某工程50 000m3大型LNG储罐(液化天然气储罐)为例,利用ANSYS有限元软件对其进行模拟实验,对LNG储罐外罐预应力筋自上向下和自下向上2种张拉顺序进行数值模拟,得到不同张拉顺序下外罐混凝土应力、位移及其变化规律.结果表明:张拉过程中,自上向下张拉时混凝土的应力低于自下向上张拉的;应变基本相等,变化规律也相同.因此,在只考虑应力、位移的条件下,自上向下张拉方案要优于自下向上张拉方案.
This paper takes a 50 000 m3 LNG storage tank as an example, according to the constitutive relation of concrete and steel, test simulation with finite element software ANSYS, we can simulate the tension to the outer wall of LNG tanks by the bottom-top tension and top-bottom tensions. The outer wall’s stress, displacement value and the change rules under tension different order were obtained. Compared with the stress and displacement, the top-bottom tension’s stress is lower than the bottom-top’s. But their strain is equal, and their changing trends are similar. Thus considering stress and displacement value, the top-bottom tension is superior to the bottom-top tension.
This paper takes a 50 000 m3 LNG storage tank as an example, according to the constitutive relation of concrete and steel, test simulation with finite element software ANSYS, we can simulate the tension to the outer wall of LNG tanks by the bottom-top tension and top-bottom tensions. The outer wall’s stress, displacement value and the change rules under tension different order were obtained. Compared with the stress and displacement, the top-bottom tension’s stress is lower than the bottom-top’s. But their strain is equal, and their changing trends are similar. Thus considering stress and displacement value, the top-bottom tension is superior to the bottom-top tension.
引文
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[12]张云峰,袁朝庆,孙建刚.储罐三维地震响应分析[J].大庆石油学院学报,2003,27(4):71-74.
[13]李文,张素梅.去除局部破损混凝土后钢筋混凝土梁受弯性能理论分析[J].工业建筑,2003,33(4):49-52.
[14]李文,张素梅,王本智,等.集中荷载作用下受拉钢筋暴露的钢筋混凝土梁受弯性能分析[J].大庆石油学院学报,2004,28(2):118-121.
[15]唐友刚,张泽盛.无锚固储液罐流体速度势及简化模型[J].水利学报,1997,42(9):42-47.
[16]张林林.储液罐动态响应分析[D].北京:北京化工大学,2007.
[2]王振良,李臻.国内外大型液化天然气储罐发展现状[J].河北化工,2010,5(27):2-3.
[3]Jeon S J,Chung C H.Strength and deformation of steel fibre reinforced concrete at very low temperature[J].International Journal ofCement Composites and Light weight Concrete,1981,2:47-51.
[4]Rostasy F S,Sprenger K H.Strength and deformation of steel fibre reinforced concrete at very low temperature[J].InternationalJournal of Cement Composites and Light weight Concrete,2000,53:307-333.
[5]项忠权.工程抗震与加固改造[J].工业设备抗震,1986(2):24-29.
[6]翁智远.核能工程中冲击结构力学的若干问题[J].上海力学,1989,10(9):33-40.
[7]张云峰,田晓雪,郭迎利,等.夹层橡胶垫隔震液化天然气储罐地震响应分析[J].科学技术与工程,2010,10(25):6318-6321.
[8]张云峰,许丽佳,李宁,等.LNG储罐混凝土外罐竖向预应力筋张拉顺序研究[J].大庆石油学院学报,2011,35(6):85-89.
[9]李文,张彬.内罐泄漏条件下LNG储罐预应力混凝土外墙时程分析[J].科学技术与工程,2010,10(14):3349-3354.
[10]彭京旗.大型LNG低温储藏施工技术[J].石油化工建设,2005,27(4):12-14.
[11]刘晓丽.夹层橡胶垫隔震预应力液化天然气(LNG)储罐地震响应分析[D].大庆:大庆石油学院,2009.
[12]张云峰,袁朝庆,孙建刚.储罐三维地震响应分析[J].大庆石油学院学报,2003,27(4):71-74.
[13]李文,张素梅.去除局部破损混凝土后钢筋混凝土梁受弯性能理论分析[J].工业建筑,2003,33(4):49-52.
[14]李文,张素梅,王本智,等.集中荷载作用下受拉钢筋暴露的钢筋混凝土梁受弯性能分析[J].大庆石油学院学报,2004,28(2):118-121.
[15]唐友刚,张泽盛.无锚固储液罐流体速度势及简化模型[J].水利学报,1997,42(9):42-47.
[16]张林林.储液罐动态响应分析[D].北京:北京化工大学,2007.
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