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1 前言结构砼裂缝的形式很多,按其成因一般可分为两大类:(1)结构裂缝:即荷载作用产生的裂缝,一般产生在结构构件内力较大的部位,其外观较规则。它与结构砼的抗力及荷载大小有关;(2)非结构裂缝:非荷载作用产生的裂缝,也称非荷载裂缝,它是除荷载以外其它因素,如结构砼的组成材料、施工工艺及环境因素等引起的结构砼自身膨胀应力或约束收缩应力超过砼极限拉应力所致。其成因较复杂,外观特征及其产生的部位也多种多样。结构裂缝的产
1 Preface Structure Concrete cracks in many forms, according to their causes generally can be divided into two categories: (1) structural cracks: the cracks caused by the load, usually in the larger parts of the structural components of internal forces, the appearance of more rules. It is related to the resistance of structural concrete and the size of load. (2) Non-structural cracks: Cracks caused by non-loading, also called non-load cracks, are other factors besides load, such as the material of construction concrete, construction technology and environment Factors such as structural stress caused by their own expansion or contraction of concrete contraction stress exceeds the ultimate tensile stress caused by the concrete. Its causes are more complex, the appearance of the characteristics and the parts they produce are varied. Production of structural cracks