Nonlinear, Incremental-Analysis Of Mass-Concrete Lock Monolith

Using the finite element code, ABAQUS, along with user-developed subroutines and experimentally derived material constants, an incremental construction analysis including thermal loads is performed on a pile-founded massconcrete lock and dam structure. The modeling, analysis technique, and algorithm involved in performing such an analysis is presented. The computer model is based upon a two-dimensional, nonlinear incremental analysis that includes the effects of creep, shrinkage, and aging Young's modulus. The presented algorithm is intended to provide a means of assessing a mass-concrete structures vulnerability to thermal stresses and possible cracking during the construction process. A discussion of the key assumptions and studies that were used in the development of the algorithm are presented. Results from the analyses of a typical lock monolith from the Melvin Price Locks and Dam on the Mississippi River at Alton, Ill. will also be presented to illustrate the usefulness of the algorithm.