American Society of Civil Engineers


Multi-Hazard Evaluation of Steel Frame Subsystem Stability Considering Damage Mapping from Extreme Lateral Loading


by Charlie Burchfield, S.M.ASCE, (The University of Mississippi, Department of Civil Engineering, 203 Carrier Hall E-mail: caburchf@olemiss.edu), Tezeswi Tadepalli, A.M.ASCE, (The University of Mississippi, Department of Mechanical Engineering, 201 Carrier Hall University, MS 38677 USA E-mail: tadepali@olemiss.edu), and Chris Mullen, Ph.D., P.E., M.ASCE, (The University of Mississippi, Department of Civil Engineering, 203 Carrier Hall E-mail: cvchris@olemiss.edu)
Section: Advanced Structural Analysis Methodologies, pp. 527-538, (doi:  http://dx.doi.org/10.1061/41131(370)46)

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Document type: Conference Proceeding Paper
Part of: Structures Congress 2010: 19th Analysis and Computation Specialty Conference
Abstract: The present study extends a multi-hazard methodology presented previously by the authors for evaluating performance of moment resisting frames subject to extreme lateral loads such as earthquake and blast. After increasing resistance based on hazard specific analysis, relative benefits are assessed in order to obtain a better appreciation of safety and economy in multi-hazardous regions. The present study examines the influence of damage on the overall stability of a system based on analysis of a beam-column subsystem. First floor columns affected by external ground level blasts may effectively lose all load carrying capacity thereby transferring gravity and live loads to adjacent parts of the subsystem, which may have reduced capacity as a result of the loading event. A mapping procedure is performed correlating reflected pressures at varying distances from the source to varying degrees of loss of load carrying capacity and stiffness. The subsystem loss is established using both analytical and computational simulations. The present study uses a 3-story steel moment resisting frame building for performance evaluation. Nonlinear material and geometric analysis are used to estimate the damage and stability, respectively, of various column subsystems around the affected area.


ASCE Subject Headings:
Damage
Lateral loads
Mapping
Natural hazards
Steel frames