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钢筋混凝土构件达到“极限状态”时,并不一定是构件折断而从结构物上塌落下来,它的所谓“极限钢筋混凝土构件达到“极限状态”时,并不一定是构件折断而从结构物上塌落下来,它的所谓“极限状态”或是挠度过大,使人有不安全感,或是裂缝太多太大会引起钢筋锈蚀,或是钢筋屈服混凝土受压区压区破碎。但这些所谓处于“极限状态”的构件,一般仍保存于结构物上,并尚能承受一定的荷载,因此钢筋混凝土受弯构件的“极限状态”是一个模糊的概念,它的可靠度也是模糊的。此外,构件的材料性能、断面尺寸、外荷载有随机性,因此钢筋混凝土受弯构件的可靠度既有随机性又有模糊性。本文综合考虑钢筋混凝土受弯构件正截面强度、斜截面抗剪以及变形,用模糊概率理论分析钢筋混凝土土受弯构件的可靠度。最后用一个例子说明,并与我国《建筑结构设计统一标准》所规定的可靠指标相比较,证明本文所提出方法的可行性和实用性
When the reinforced concrete member reaches the “limit state”, it does not necessarily mean that the member breaks down and falls down from the structure. When its “ultimate reinforced concrete member reaches the “limit state”, it does not necessarily mean that the member breaks from the structure. When it collapses, its so-called “limit state” or deflection is too large, causing people to feel insecure, or too much cracks can cause corrosion of steel bars or breakage of reinforcements in compression zone of compressed concrete. The so-called “limit state” components are generally still stored on the structure, and can still withstand a certain amount of load. Therefore, the “limit state” of reinforced concrete bending members is a vague concept, and its reliability is also ambiguous. In addition, the material properties, fracture dimensions, and external loads of the components are random, so the reliability of the reinforced concrete flexural members is both random and ambiguous.This paper comprehensively considers the strength of the normal section of a reinforced concrete flexural member and the shear resistance of the oblique section. As well as deformation, the reliability of reinforced concrete flexural members was analyzed using the fuzzy probability theory. Finally, an example was used to explain the structural design of reinforced concrete. Standard "under reliable indicator compared to demonstrate the feasibility and practicality of the proposed method