超长混凝土结构裂缝控制研究综述

Literature Review on Crack Control of Super Long Concrete Structures

超长混凝土结构凭借其优越的空间利用能力和整体结构的美观性成为目前使用较为广泛的建筑结构之一。相比正常尺寸结构形式,由于超长结构的受力往往会超过限值,使得超长结构更容易出现裂缝等问题。在实际工程中,应用较为广泛的裂缝控制措施有“抗”“放”和“防”的原则。“抗”的原则体现了增强材料自身的理念,“放”的原则是为结构创造自由变形的条件,“防”的原则从本质上处理超长结构的裂缝问题。综述了超长混凝土结构裂缝控制措施的类型,在此基础上,总结了近年来国内工程中用于解决超长结构裂缝问题的方法,分析了目前研究的不足,为未来裂缝控制研究提供参考。

Super long concrete structure has become one kind of the widely used building structures because of its merits in superior space utilization ability and in the beauty of overall structure.Comparing to normal size structures,the induced stress of super long structure always tends to exceed the limiting value,which results in more cracks.Generally speaking,there are three major principles used for controlling cracks:resist,release and prevent.The principle of“resist”embodies the idea of reinforcing materials themselves;the principle of“release”is to create conditions for free deformation of the structure;and the principle of“prevent”essentially solves the problem of cracks in the super long structures.In this paper,the types of crack control measures for super long concrete structures are summarized.On this basis,the methods used to solve the crack problems of super long structures in domestic construction practice in recent years are summarized,and the shortcomings of the current research are analyzed.It is intended to provide reference for future research on crack control.