预应力方法在预防横拉门船闸门库裂缝中的应用

针对横拉门船闸闸首门库极易在施工期产生裂缝的问题，尝试对门库的危险部位施加预应力技术。通过ANSYS有限元软件并结合Fortran语言，对横拉门船闸整个浇筑过程进行仿真分析得出门库部位应力分布情况，运用等效荷载法对门库部位施加预应力，并对施加预应力前后的闸首门库的温度应力进行对比分析。结果表明施加预应力后门库部位最大拉应力从1.98 MPa降低到了1.80 MPa，低于混凝土应力控制标准，验证了预应力方法在门库裂缝防治中的可行性

Prestress method for crack prevention of lock head gate with transverse pull door

To counter the problem of cracks which are easily occurred in the horizontal sliding door lock head during construction,we try to exert prestress to the gate chamber.Combining Fortran language and ANSYS finite element analysis software,we analyze the process of pouring and get the stress distribution at the loch chamber,and carry out comparative analysis of the temperature stress before and after exertion of the stress.The result reveals that after exerting the prestress,the maximum tensile stress at the loch chamber decreases from 1.98 MPa to 1.80 MPa,which is lower than the control standard of concrete stress.It verifies that the method of prestress is feasible for preventing and curing the crack of the gate chamber.