Structural Research On Three Dimension Prestressed Multi-SideWall Aqueduct

The middle line water transfer project from south to north is constructing in China. The huge current capacity aqueduct is one of the important structure type in water distribution. Three dimension pre-stressed multi-side wall structure is often used. It has many problems which have not solve, such as calculation theory, the influence of temperature to the structure, the wet modality affects on each other and the earthquake respond, water non-linear shake works on the structure and so on. Because of above questions, it's a high threat to the security of the aqueduct, such as structural crack. Base on above questions, research on the stability, the efficiency and the rationality of aqueduct.The main research contents and achievement list as follows:1.Bring forward the structural design computation theory in large three dimension pre-stressed multi-side wall aqueduct. Its structural design theory pauses in divides the aqueduct into two directions separately. Disposes the steel stranded wire and the steel bar according to calculates of lengthways and the transverse. The result is conservative to the middle wall, the side wall is more dangerous. Using this theory, the experiment confirms that the design is reasonable and reliable.2. Bring forward the hot-structure coupling analysis method on the multi-side wall structural temperature computation. The ANSYS program coupled fields considered 2 or more physical fields affects each other. Used the sequence coupling method can solve its temperature field and calculate the structure stress.3.Using the fluid theory and the structural vibration equation, analyzed the structural wet modality characteristic, obtains the wet modality orthogonal relations and vibration load formulas. The computation indicated that water quality effect and its inertia influence, even in low earthquake intensity situation, the vertical earthquake function is hugeous. On the earthquake wave incidence by the bedrock surface, calculated the aqueduct integrated system dynamic performance.4. By calculated the steel stranded wire construction process based on the ANSYS program, determined the steel stranded wire construction process.5.Established the three dimensional finite element aqueduct computational program, combine with Caohe aqueduct (Caohe aqueduct is the first biggest three dimension pre-stressed multi-side wall structural engineering in our country). Bring forward the structural stress computation result and has endured the experimentation.6. Studied the crack control of this type aqueduct first time. The reality is"every aqueduct exists crack". Through the research and analysis on the crack mechanism, analyzed the crack control measure from design to construction, give advices on how to avoid the crack. 7.Through the model design and experiment of aqueduct structural, examines the structure and the steel stranded wire in bearing capacity. Give regular conclusions on this type aqueduct bearing capacity.