预应力锚垫板结构优化设计

Optimization Design for Prestressed Bearing Plate Structure

预应力混凝土结构应用范围的扩大对锚下混凝土结构的安全性提出了更高的要求。根据南水北调中线干线工程预应力设计中对于锚垫板的锚具要求,对OVM锚固体系中YM-M15E-12D进行优化改进分析,提出优化设计思路,确立新型锚垫板M15CJ-12D的结构形式,对新结构进行ANSYS分析,并与原结构进行有限元对比分析,且通过荷栽传递试验测试构件的性能及检验其安全性,对比分析锚下混凝土结构试验应变值跟模拟应变值,验证模拟的各项参数符合实际工况,最终得到更为安全、先进、经济的锚下混凝土结构体系。

With the expansion of application scope of prestressed concrete structure, there has higher request for the safety of the concrete structure under the anchor. According to the requirements for anchor-plate in the design of prestressed in the South-North water transfer middle route project, the optimization and improvement of YM-M15E-D in OYM anchorage system,are analyzed, the optimization design method is put forward, and the structure of new anchor system M15CJ-12D is established. Then the new structure is analyzed by Ansys, the result is compared with its original structure. And its compo- nents and safety performance are tested by load transfer test, the strain values of concrete structure, tests and strain values that simulated are compared and analyzed. The results confirm that simulation parameters conform to the actual working condition. Finally a safer, advanced and economic concrete structure system under anchor is obtained.