弹性应力配筋在毛尔盖坝基灌浆廊道中的应用

Application of elastic stress reinforcement to Foundation Grouting Gallery of Mao’ergai rockfill dam

水工建筑物中常有一些体型或受力条件复杂的构件,无法按杆件结构力学法求出截面内力并配筋。对于此类构件的配筋方式以往多采用经验类比,但各工程各不相同,可能出现因配筋不足而出现拉裂等问题,文章根据《水工混凝土结构设计规范》非杆件体系钢筋混凝土结构的线弹性应力图形法,结合毛尔盖坝基灌浆廊道的三维有限元应力计算成果,进行配筋,并根据监测资料验证了其合理性。

Shapes or components of complicated stresses, which can not calculate section internal force and rein-forcement based on pole structures, are often found in hydraulic structures. Generally, the reinforcements of such components are arranged based on experience analogy, which is determined upon practices and may appear pullcracks due to insufficient reinforcement. The paper makes an introduction to the arrangement of reinforcements based on linear elastic stress of non-pole reinforced concrete structure of ＂Design specification for hydraulic con- crete structures＂ in combination with the stress calculation results of 3D finite element analysis of Mao＇ergai dam foundation grouting gallery, and verifies its rationality according to the monitoring data.