CAJ | 학술논문

　　混凝土凸块锚固区是体外预应力的一种常见锚固形式，目前尚没有成熟的设计方法。本文通过有限元数值分析，揭示了产生局部拉应力集中的3种作用效应；在此基础上，提出了这3种局部作用效应合拉力的解析计算公式，作为凸块锚固区定量化配筋设计的依据。通过南京长江第四大桥引桥凸块锚固区的设计实践，表明该方法具有良好的实用性。
　　혼응토철괴묘고구시체외예응력적일충상견묘고형식，목전상몰유성숙적설계방법。본문통과유한원수치분석，게시료산생국부랍응력집중적3충작용효응；재차기출상，제출료저3충국부작용효응합랍력적해석계산공식，작위철괴묘고구정양화배근설계적의거。통과남경장강제사대교인교철괴묘고구적설계실천，표명해방법구유량호적실용성。
Reinforced blocks are common anchorage forms for external tendons. However,there was no mature design method. Through finite element analysis,the paper revealed that the tensile stress concentration was caused by three typical local actions. On this basis,three equations for calculating resultant forces of these local actions were formulated. Thus a quantitative reinforcement design method of anchor blocks was proposed. Finally,an anchor block of the Fourth Nanjing Yangtze River Bridge was presented as a design example to dem-onstrate the effectiveness and convenience of the proposed method.