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本文基于可靠度理论研究了混凝土构件抗裂和限制裂缝宽度的失效模式。阐述了对使用极限状态设计基准期的选取及其相应的荷载效应组合的建议；提出了混凝土构件三种抗裂尺度条件下可靠度分析的一般原则以及考虑混凝土早期开裂对抗裂可靠度模式的影响；将裂缝宽度与荷载效应之间的关系视作随机函数，在以短期裂缝宽度为依据并考虑长期增长的物理模式基础上，建立了任意裂缝宽度分布及裂缝宽度极大值分布的密度函数，给出了失效概率公式。
Based on the reliability theory, this paper studies the failure modes of crack resistance and limiting crack width of concrete structures. The selection of the design base period for use limit state and the corresponding combination of load effects are presented. The general principles of reliability analysis under three conditions of crack resistance of concrete structures and the effect of early cracking on the cracking reliability of concrete are discussed. Considering the relationship between crack width and load effects as a random function, based on the short-term crack width and taking into account the long-term growth of the physical model, a density function is established for the distribution of arbitrary crack widths and maximum distribution of crack widths. The failure probability formula is given.