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BEARING CAPACITY RESEARCH ON ARCHED CORRUGATED STEEL ROOF WITH UNEQUAL ALTITUDE SUPPORT
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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。Abstract: 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.
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