Cumulative Structural Damage from Multiple Weapons

ABSTRACT: This proposed Phase II research is based on the results developed by K & C in an earlier Phase I SBIR study where we established the feasibility of (1) analytically modeling the behaviors of walls to multiple hits and (2) developing a High Fidelity Physics Based (HFPB) fast-running model (FRM) for multi-hit analyses of walls. In this proposal a cumulative damage (CD) FRM will focus on RC bunker-type walls and slabs. The methodology proposed to develop the CD-FRM for RC bunkers is general in nature. It can be readily extended to other structural components such as those associated with MOUT type components. In the same manner as our previous single hit FRMs were developed for RC bunkers and MOUT structures. BENEFIT: Given the generality of the analysis and fast-running modeling technology proposed, many non-military applications are possible. One possibility is enhanced risk analysis tools for the earthquake response and resistance to both man-made and accidental blast responses of civil structures. K & C has already marketed some of our FRM codes and engineering services to government and commercial clients. Other potential customers include the Department of State, the Secret Service, DHS, DDESB, FAA, GSA, and all agencies for which consideration of multiple threats is of interestthat is, not just for multiple explosive events, but also for events such as an explosive detonation followed by a fire. These agencies would also be interested in several forms of this type of capability (i.e., to evaluate multi-hit threats and responses to them), for example, besides the damaging of structural components, considerations related to achieving a forced entry, the risk of collapse, and amounts of debris production would be of interest.