直立式加筋土挡墙基于极限分析的抗震性能研究
Seismic Performance of Vertically Reinforced Earth-RetainingWalls Based on Limit Analysis

研究直立式加筋土挡墙抗震性能时，采用的NCMA方法未全面运算其墙外功率，抗震性能分析结果存在较高偏差。采用极限分析的方法对直立式加筋土挡墙破坏模式展开极限分析，得到该挡墙运动极限表达式。根据运动极限表达式，对一实例墙体计算出此挡墙外功率（包括土重所做的外功率和地震作用所做的外功率），分析其抗震性能。实验结果表明，计算得到直立式加筋土挡墙各层筋材最大外功率分别为18.5 kN·m和20 kN·m，与实际最大外功率18 kN·m差距不大，说明该方法的抗震性能分析与实际情况相符，具有应用性。
When using the National Concrete Masonry Association method of studying the seismic performance of vertically reinforced earth-retaining walls, the external power of the wall could not be comprehensively calculated, and there was a high deviation in the results of the seismic performance analysis. Therefore, the limit analysis method was used in this paper to analyze the failure mode of a vertically reinforced earth-retaining wall, and an expression of the movement limit of the retaining wall was obtained. According to the expression, the external power of the retaining wall (including the external power of the soil weight and the external power of earthquake action) was calculated, and its seismic performance analyzed. The experimental results showed that the maximum external power of each layer of the vertically reinforced earth-retaining wall was 18.5 kN·m and 20 kN·m, respectively, which did not vary significantly from the actual maximum external power (18 kN·m). The study indicates that seismic performance analysis with this method is consistent with actual conditions and can be applied to actual projects