本文讨论锚下混凝土的抗裂安全系数。作者用大量已建成的桥梁实例讨论了我国公路和铁路桥梁规范中规定的计算方法和要求。在比较了各桥实有的和规范规定的数据之后,作者提出新的(较低的)安全系数值供规范修订参考,同时对锚下混凝土局部容许压应力的提高系数β提出修改的计算方法,供大家商榷。 This article discusses the crack safety factor of concrete under anchor. The author discusses the calculation methods and requirements stipulated in the norms of China’s road and railway bridges with a large number of completed bridges. After comparing the actual and normative data for each bridge, the authors propose new (lower) values ​​of safety factors for revisions to the code, and propose a modified method for calculating the coefficient of increase of local compressive stress allowed in sub-sea concrete , For your discussion.