支座不等高拱形波纹钢屋盖承载性能研究
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摘要
随着拱形波纹钢屋盖(简称波纹拱)在我国的广泛应用,支座不等高等特殊波纹拱在实际工程中得到应用。目前,支座不等高拱形在竖向荷载作用下的承载能力尚难以求得。通过以18m跨MMR-238型波纹拱为对象,采用ABAQUS有限元软件,对不同矢跨比下,支座不等高对波纹拱在不同竖向荷载工况下承载力的影响进行研究。在全跨竖向荷载作用下,与同跨度等高支座相比,支座不等高波纹拱的极限承载力有较大降低,而在半跨竖向荷载作用下,支座高度差对结构的极限承载力影响较小。
With the widespread application of Arched Corrugated Steel Roof(ACSR) in China,sometimes ACSR with unequal altitude support is applied in the practical projects,whose bearing capacity under vertical load is unknown.A 18mspan MMR-238 ACSR is taken as a research object.For ACSR with different ratio of rise to span,the influence of unequal altitude support to the bearing capacity under different vertical load is studied,by using ABAQUS finite element software.Under full-span vertical load,the ultimate bearing capacity of the ACSR with unequal altitude support reduced greatly compared with the equal altitude support situation.Under half-span vertical load,the influence of unequal support altitude is small to the structural ultimate bearing capacity.
With the widespread application of Arched Corrugated Steel Roof(ACSR) in China,sometimes ACSR with unequal altitude support is applied in the practical projects,whose bearing capacity under vertical load is unknown.A 18mspan MMR-238 ACSR is taken as a research object.For ACSR with different ratio of rise to span,the influence of unequal altitude support to the bearing capacity under different vertical load is studied,by using ABAQUS finite element software.Under full-span vertical load,the ultimate bearing capacity of the ACSR with unequal altitude support reduced greatly compared with the equal altitude support situation.Under half-span vertical load,the influence of unequal support altitude is small to the structural ultimate bearing capacity.
引文
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2 CECS 167∶2004拱形波纹钢屋盖结构技术规程
3郭彦林,郑浩然.彩色波形拱壳屋面结构折曲屈曲试验研究.工业建筑,1997,27(11):30-33
4李少甫.冷弯折皱薄壁拱壳轻钢房屋.建筑结构,1998(1):23-25
5王小平.大跨度金属拱型波纹屋顶试验研究与有限元分析:[博士学位论文].武汉:武汉工业大学,1999
6张勇.金属拱型波纹屋盖结构分析、设计理论和试验研究:[博士学位论文].天津:天津大学,2000
7杨维国,徐国彬.冷弯折皱薄壁拱壳轻型钢结构在风荷载下的动力响应.空间结构,2000(2):44-49
8谭成冬,王元清,石永久,等.拱型波纹钢屋盖动力特性分析.四川建筑科学研究,2004(2)
9王小平,蒋沧如,胡春宇,等.拱型波纹钢屋盖动力特性测试及分析.地震工程与工程振动,2005(5):112-116
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