环保型超大直径浅圆筒仓几个关键问题的分析研究
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摘要
本文以某超大直径全封闭圆形混凝土料仓为研究对象,按照我国混凝土筒仓规范的要求和已完成的筒仓设计,对在各不均匀贮料堆载作用下和不同工况作用下的考虑上部结构—基础—地基共同作用的筒仓进行计算并得出有限元分析结果;对于季节温差下的典型工况,进行了热—结构耦合后的有限元分析,并同样对结果作出分析比较,得出季节温差对结构的影响;根据环形预应力筋的作用机理,采用等效荷载法模拟预应力作用,分析圆筒仓结构满载和空载两种情况预压力作用下的受力性能,并和未施加预应力时做对比,探讨预应力的作用。
A fully enclosed Circular concrete silo with large diameter according to the China specification requirements of concrete silo and the completed design of the silo was studied,considering the upper structure-basic-Foundation joint action of the silo,the finite element analysis results in uneven material heap load and in different operating conditions was calculated and obtained;To the typical operating conditions about the range of season temperature,coupled Thermal-structural finite element analysis was conducted and was compared.The result of the finite analysis,to draw the range of seasonal temperature how to influence the structure;According to the mechanism of action of the annular prestressing tendons,use method of equivalent load simulation prestress,analyse the stress performance of the silo structure at full load and no-load both cases under the pre-pressure,and compare with no pre-stressed,investigate the role of prestressing.
A fully enclosed Circular concrete silo with large diameter according to the China specification requirements of concrete silo and the completed design of the silo was studied,considering the upper structure-basic-Foundation joint action of the silo,the finite element analysis results in uneven material heap load and in different operating conditions was calculated and obtained;To the typical operating conditions about the range of season temperature,coupled Thermal-structural finite element analysis was conducted and was compared.The result of the finite analysis,to draw the range of seasonal temperature how to influence the structure;According to the mechanism of action of the annular prestressing tendons,use method of equivalent load simulation prestress,analyse the stress performance of the silo structure at full load and no-load both cases under the pre-pressure,and compare with no pre-stressed,investigate the role of prestressing.
引文
[1](GB50077-2003)钢筋混凝土筒仓设计规范[S].中国计划出版社,2004.
[2]张少坤,大直径钢筋砼筒仓温度荷载和贮料荷载作用有限元分析[D].武汉:武汉理工大学,2010.
[3]张德玉,大直径预应力混凝土浅筒仓抗震计算及模型简化分析[D].合肥:安徽建筑工业学院,2008.
[4]陈载赋.钢筋混凝土建筑结构与特种结构手册[M].成都:四川科学技术出版社,1992.
[5]彭雪平.基于不同基础计算模型的巨型贮煤结构内力分析[J].武汉大学学报,2005,38(4):63-67.
[6]陈明祥.大型整体式贮煤筒仓结构设计中的几个问题[J].武汉大学学报,2007,40(增刊):128-132.
[7](GBJ77-85)钢筋混凝土筒仓设计规范[S].北京:1985.
[8]袁龙飞,预应力混凝土圆形筒仓有限元分析与设计方法研究[D].西安:西安建筑科技大学,2011.
[9]李和平,大直径预应力混凝土筒仓地震反应分析[D].武汉:武汉理工大学,2008.
[10]孔德润,蒲为民.直径40m圆筒煤仓的温度作用研究[J].特种结构,1998,15(4):32-38.
[11]谢醒悔,韩选江,叶湘菡.现代预应力混凝土结构设计理论及应用[M].北京:机械出版社,2007.
[12]M.L赖姆伯特,A.M赖姆伯特著,顾孝华译.筒仓理论与实践[M].北京:中国建筑工业出版社,1981.
[13]八寻隆道.粉体の初期充と填状态贮槽の异常壁压[J].粉体工学志,1994,31(12):850-861.
[14]A.Mahmoud Loading on shallow cylindrical flexible grain bins[J].Jnl Powder Bulk Solids Tech,1981,5(3):12-19.
[15]Zhang Q.Static and thermal loads in full size grain bins predicted by vectorized FEM on supercomputer[J].Trans of the ASAE,1989,32(2):685-691.
[16]Schmidt L C and Y H Wu.Prediction of dynamic wall pressures on silos[J].Thin-Walled Struct,1989,9(3):333-338.
[2]张少坤,大直径钢筋砼筒仓温度荷载和贮料荷载作用有限元分析[D].武汉:武汉理工大学,2010.
[3]张德玉,大直径预应力混凝土浅筒仓抗震计算及模型简化分析[D].合肥:安徽建筑工业学院,2008.
[4]陈载赋.钢筋混凝土建筑结构与特种结构手册[M].成都:四川科学技术出版社,1992.
[5]彭雪平.基于不同基础计算模型的巨型贮煤结构内力分析[J].武汉大学学报,2005,38(4):63-67.
[6]陈明祥.大型整体式贮煤筒仓结构设计中的几个问题[J].武汉大学学报,2007,40(增刊):128-132.
[7](GBJ77-85)钢筋混凝土筒仓设计规范[S].北京:1985.
[8]袁龙飞,预应力混凝土圆形筒仓有限元分析与设计方法研究[D].西安:西安建筑科技大学,2011.
[9]李和平,大直径预应力混凝土筒仓地震反应分析[D].武汉:武汉理工大学,2008.
[10]孔德润,蒲为民.直径40m圆筒煤仓的温度作用研究[J].特种结构,1998,15(4):32-38.
[11]谢醒悔,韩选江,叶湘菡.现代预应力混凝土结构设计理论及应用[M].北京:机械出版社,2007.
[12]M.L赖姆伯特,A.M赖姆伯特著,顾孝华译.筒仓理论与实践[M].北京:中国建筑工业出版社,1981.
[13]八寻隆道.粉体の初期充と填状态贮槽の异常壁压[J].粉体工学志,1994,31(12):850-861.
[14]A.Mahmoud Loading on shallow cylindrical flexible grain bins[J].Jnl Powder Bulk Solids Tech,1981,5(3):12-19.
[15]Zhang Q.Static and thermal loads in full size grain bins predicted by vectorized FEM on supercomputer[J].Trans of the ASAE,1989,32(2):685-691.
[16]Schmidt L C and Y H Wu.Prediction of dynamic wall pressures on silos[J].Thin-Walled Struct,1989,9(3):333-338.
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