中南工业大学学报(自然科学版)
中南工業大學學報(自然科學版)
중남공업대학학보(자연과학판)
JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLGY(NATURAL SCIENCE)
2000年
4期
371-374
,共4页
结构%模糊可靠度%隶属函数%预应力%空心板
結構%模糊可靠度%隸屬函數%預應力%空心闆
결구%모호가고도%대속함수%예응력%공심판
structure%fuzzy reliability%membership function%pre-stress%hollow core slab
结构的可靠度不仅与确定影响因素和不确定影响因素有关,而且与破坏准则的模糊不确定性有关.考虑到这些不确定性因素的影响,利用结构可靠性理论和模糊数学,讨论和分析了结构破坏的隶属函数的内涵,并提出了一种计算结构的模糊可靠度的公式.以预应力空心板为例进行了验证计算,分析了结构抗力变异系数、荷裁效应容差以及结构抗力容差等对结构模糊可靠度的影响.实践证明,所得到的结论与实际情况相符.
結構的可靠度不僅與確定影響因素和不確定影響因素有關,而且與破壞準則的模糊不確定性有關.攷慮到這些不確定性因素的影響,利用結構可靠性理論和模糊數學,討論和分析瞭結構破壞的隸屬函數的內涵,併提齣瞭一種計算結構的模糊可靠度的公式.以預應力空心闆為例進行瞭驗證計算,分析瞭結構抗力變異繫數、荷裁效應容差以及結構抗力容差等對結構模糊可靠度的影響.實踐證明,所得到的結論與實際情況相符.
결구적가고도불부여학정영향인소화불학정영향인소유관,이차여파배준칙적모호불학정성유관.고필도저사불학정성인소적영향,이용결구가고성이론화모호수학,토론화분석료결구파배적대속함수적내함,병제출료일충계산결구적모호가고도적공식.이예응력공심판위례진행료험증계산,분석료결구항력변이계수、하재효응용차이급결구항력용차등대결구모호가고도적영향.실천증명,소득도적결론여실제정황상부.
Reliability of structure is related not only to certain and uncertain influence factors, but also to fuzzy uncer-tain of destroy rule. Considering these uncertain influence factors, meaning of membership function of structural damagehas been discussed and analyzed, fuzzy reliability index formulas of structure have been presented using theory of struc-tural reliability and fuzzy mathematics. Checking computations have been made with pre-stress hollow core slab as an ex-ample, and the effects of variation coefficient of structural resistibility, tolerance of load effect and tolerance of structuralresistilility, etc. are analysed. Several conclusions which have been obtained are in agreement with real practice.