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Title: Three-Dimensional Macro-Modeling of Concrete Slabs Subjected to Missile Impact Loading

Author(s): Andac Lulec, Vahid Sadeghian, and Frank J. Vecchio

Publication: Structural Journal

Volume: 119

Issue: 1

Appears on pages(s): 77-88

Keywords: element erosion; finite element modeling; impact loading; nonlinear analysis; reinforced concrete slabs

DOI: 10.14359/51734189

Date: 1/1/2022

Abstract:
This study presents a macro-modeling method for analysis of reinforced and prestressed concrete slabs under soft and hard missile impact loads. The analysis method is based on the Modified Compression Field Theory, incorporating a rational approach based on fundamental principles of solid mechanics and eliminating the need for extensive material characterizations. An iterative self-calibrating procedure was developed and implemented into a finite element analysis framework to systematically determine element erosion limits and damping coefficients, expanding the applicability range of the analysis method. Two different implementation methods for incorporating damping into the analysis formulation are investigated. Special considerations are given to modeling strain rate effects and advanced material mechanisms. The performance of the analysis method is evaluated through modeling 12 missile impact tests from the literature as well as conducting a series of analytical parametric studies. The analysis results show that the proposed modeling method is an efficient and reliable approach for analysis of concrete slabs under impact loading capable of capturing localized damages and shear failures.