Avoiding Disproportionate Collapse

Single Abstract

343055 - On the Design of SC Walls for Missile Impact: Summary of Tests and Simulations

Friday, April 20
11:00 AM - 12:30 PM
Location: 202CD

Conventional reinforced concrete (RC) structures have historically been the preferred choice for blast and impact resistant structures. Experimentally validated equations to calculate the required wall thickness of conventionally reinforced concrete walls (RC) to prevent scabbing and perforation exist and are included in NEI 07-13 and DOE-STD-3014-2006. Steel-plate composite (SC) walls consist of a concrete wall sandwiched between two steel plates. These plates are anchored to the concrete wall using stud anchors, and connected to each other using ties. For an SC wall, steel plates serve as reinforcement and formwork, which allows for modularization of the design and accelerated construction. The authors (Bruhl et al.) have recently proposed a rational three-step method to design SC walls to resist missile perforation. This design method was validated using tests available in the literature at that time. However, it has not been systematically evaluated and validated by conducting an experimental program designed to quantify its inherent conservatism and refine the accuracy of the method.
In this research, total of sixteen missile impact tests were conducted to investigate local failure behavior of SC walls subjected to missile impact. Experimental results were presented along with a discussion of extent of damage of post-tested SC walls including perforation check, damage modes, impact velocity, penetration depth and bulging depth. Numerical models were developed to simulate the effects of missile impact on SC walls to gain additional insights into localized behavior. The nonlinear finite element models will be discussed with respect to their fidelity in predicting SC wall missile impact behavior. The analysis results will be summarized and compared with experimental test results. Improvements to the design method will be suggested using the results from experimental and numerical investigation.

Joo Min Kim

Student
Purdue University

n/a

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Jakob C. Bruhl

Assistant Professor
U.S. Military Academy, West Point

Lieutenant Colonel Jakob Bruhl is an Assistant Professor in the Department of Civil and Mechanical Engineering at the United States Military Academy, West Point, NY. He received his B.S. from Rose- Hulman Institute of Technology, M.S. Degrees from the University of Missouri at Rolla and the University of Illinois at Urbana/Champaign, and Ph.D. from Purdue University. He is a registered Professional Engineer in Missouri. His research interests include resilient infrastructure, protective structures, and engineering education.

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Amit H. Varma

Professor of Civil Engineering
Purdue University

Prof. Amit H. Varma is a Professor in Purdue University, Lyles School of Civil Engineering, and Director of the Robert L. and Terry L. Bowen Laboratory of Large-Scale Civil Engineering Research. He was a University Faculty Scholar from 2011 - 2016. He is a member of the AISC Committee of Specifications, and the Chair of Task Committee 8 on Fire Design. He was the chair of the SEI/ACI Committee of Composite Construction from 2010-17. He is a member of ACI Committee 349. Dr. Varma’s primary area of expertise is steel-concrete composite construction.

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