Application of NLFM Models to Predict Cracking in Concrete Gravity Dams
Publication: Journal of Structural Engineering
Volume 120, Issue 4
Abstract
Smeared crack analysis models based on a nonlinear fracture mechanics (NLFM) crack propagation criterion are considered to study the two‐dimensional static fracture behavior of plain concrete structures. A coaxial rotating crack model (CRCM) and a fixed crack model with a variable shear resistance factor (FCM‐VSRF), both using a secant stiffness formulation, are considered in studying the behaviors of a notched shear beam, a model concrete gravity dam, and a full‐scale concrete gravity dam: all have been experimentally or numerically investigated in the past. The responses obtained from smeared crack analyses are compared with those reported in the literature by other investigators. The CRCM appears to perform better than the FCM‐VSRF in alleviating the stress‐locking phenomenon generally observed in smeared crack analyses. However, the crack profiles predicted by the rotating crack model are prone to the directional bias caused by finite element meshes of the elementary beam problem and the model concrete dam. The two smeared crack propagation models (CRCM and FCM‐VSRF) provide reasonable responses when a full‐scale concrete gravity dam is analyzed.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 120 • Issue 4 • April 1994
Pages: 1255 - 1271
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: Sep 10, 1992
Published online: Apr 1, 1994
Published in print: Apr 1994
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