Nonlinear, Incremental Structural Analysis of McAlpine Lock Replacement forChamber, Miter Gate, and Culvert Valve Monoliths

摘要

In January 1993, the U.S. Army Engineer (USAE) District, Louisville, requestedthat the USAE Waterways Experiment Station perform a nonlinear, incremental structural analysis (NISA) of the McAlpine Lock Replacement project. The NISA process has been used for approximately the last 10 years to evaluate massive concrete structures for their constructibility and to provide a means for considering the effects of various changes to construction procedures. The McAlpine project will be constructed at the existing McAlpine locks, which are located in the shipping canal of the Ohio River at mile 607. The NISA was successful, as it achieved the objectives set out at the beginning of the study and also provided additional information about the construction of the lock wall monoliths. The study showed that concrete could be placed in lifts up to 10 ft high and that a maximum placing temperature of 70 deg F may be used. Analyses showed that these same parameters could also be used in the construction of the miter gate monolith and culvert valve monolith. The study also showed that the manner in which reinforcing is used is very effective, since the only areas that exhibited cracking or relatively high cracking potentials were near the base of the monolith or around the gallery (both of these locations are reinforced).