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针对混凝土材料存在着“重—脆—裂”的弱点,在混凝土结构中常见的裂缝—收缩裂缝、沉降裂缝、温度裂缝、应力裂缝、化学反应引起的不均匀膨胀裂缝等。从应力—变形—裂缝的渐变历程来分析,以阐明结构混凝土产生局部不均匀内应力至裂的本质原因。从而,提出了预防混凝土裂缝的综合措施,以及对既有裂缝的处理。在混凝土结构中大多数是属于受拉或拉剪破坏,所以消除或缓解应力、应变,提高其抗拉强度和抗裂性是防裂、抗裂、补强加固的根本措施。
For concrete materials, there are weaknesses of “heavy-brittle-cracked”, common cracks in concrete structures-shrinkage cracks, settlement cracks, temperature cracks, stress cracks and uneven expansion cracks caused by chemical reactions. From the gradual change of stress-deformation-fracture process to analyze, in order to clarify the inherent causes of local uneven internal stress cracking in structural concrete. Therefore, comprehensive measures to prevent concrete cracks are proposed, as well as the treatment of existing cracks. Most of the concrete structures belong to the tensile or shear failure, so to eliminate or alleviate the stress and strain, improve its tensile strength and crack resistance is the fundamental measure to crack, crack, reinforcement.