引言建筑和建筑材料的裂缝源于变形受到限制;或产生于材料本身,如温度膨胀与收缩;或由于毗连的材料如梁或板的位移。在多数情况下,建筑材料的变形是不可避免的,对此,必须容许、控制,或者通过计算使裂缝得以预防。了解产生导致裂缝的应力的不同原因,是预防裂缝的有效方法。... INTRODUCTION Cracks in buildings and building materials are caused by deformations that are limited; either from the material itself, such as temperature expansion and contraction; or from the displacement of adjoining materials such as beams or plates. In most cases, the deformation of building materials is unavoidable. To this end, it must be allowed, controlled, or calculated to prevent cracks. Understanding the different causes of the stresses that cause cracks is an effective way to prevent cracks. ...