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在评定钢筋混凝土构件质量时,除强度和外观要求外,最量多面广的就是构件裂缝问题。裂缝形成的因素十分复杂,有的是在制作、搬运、堆放、安装和使用过程中受各种外力形成的,有的是受温度、湿度和千缩影响等形成的,本文着重讨论直接影响构件安全的裂缝。一、裂缝宽度限值的有关规定表1是我国有关规范对钢筋混凝土构件受外力裂缝宽度的限值,表2是几种国标、部标、省标图集对构件提出的裂缝宽度限值要求。表中规范、规程或图集的要求说法不一,有互相矛盾之处。有的
When assessing the quality of reinforced concrete components, in addition to the strength and appearance requirements, the most extensive one is the component crack problem. The factors of crack formation are very complex. Some of them are formed by various external forces during production, handling, stacking, installation, and use. Some are formed by temperature, humidity, and shrinkage. This article focuses on cracks that directly affect the safety of components. First, the relevant provisions of the crack width limit Table 1 is the relevant specifications of China’s reinforced concrete structures subject to external force limits the width of cracks, Table 2 is the number of national standards, landmarks, provincial standard Atlas of the components of the crack width limit requirements . The requirements of the specifications, procedures, or atlases in the table are not the same and there are conflicting areas. some