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Hinman Pulse

November 14, 2012

WEBINAR:  Anti-Terrorism/Force Protection in compliance with the 2012 Unified Facilities Criteria

by Hinman Team

Hinman Consulting Engineers will be hosting a free informative webinar for our valued clients on the changes to the New UFC DoD minimum antiterrorism standards for buildings, UFC 4-010-01 dated February 9, 2012.  We will discuss the applicability of the new criteria and provide a summary of changes.


March 31, 2011

Finding the “Correct” Solution: Blast Evaluation of Prestress Precast Concrete Panel

by Hinman Team

At this year’s structures congress, I will be presenting a case study contrasting single degree of freedom (SDOF) analysis and finite element (FE) analysis methods for determining blast support reactions for architectural prestressed concrete façade panels.  There may be room for us, as engineers, to better understand the assumptions inherent in different analytical approached in an effort to minimize conservative design while optimizing expected system performance.


March 17, 2011

Tilt that Sucker Up!

by Hinman Team

Use of tilt-up reinforced concrete panels has proven to be very efficient when applied to… structures whose design is dictated by functionality and constructability and [often] discounted when aesthetic design needs are more profound.  However, recent trends in the architecture and engineering world are beginning to encourage a wider use of tilt-up construction as a result of aesthetic improvements of this building system.  Specifically, Hinman has noticed recent trends related to new federal building projects to explore the level of blast protection offered by tilt-up walls.


February 24, 2011

The Effect of Fire Following an Extreme Event

by Hinman Team

The ability of a structure to resist a disproportionately large collapse due to localized damage (i.e. progressive collapse) has become a topic of increasing concern within the building community in the wake of structural collapses worldwide over the last half century… The goal of this study is to raise awareness of potential fire hazards that may follow extreme events and provide recommendations regarding evacuation times for occupants of damaged buildings under fire.


February 24, 2011

Performance Limits for Progressive Collapse

by Hinman Team

Progressive collapse is an extreme loading event that requires identifying and engaging all necessary and available load paths within a structure.  Most recently, Hinman engineers have conducted a nonlinear dynamic finite element analysis of an existing 33-story high rise structure with the intent of pushing the limits of structural performance.  Hemmed in by the constraints of the current governing criteria, project engineers found structural performance to be limited by the required use of seismic documentation.  When costs and upgrades are a concern, and collapse is the question, it appears to be necessary to redefine the problem of progressive collapse.


February 24, 2011

Concrete Anchorage for Extreme Loading

by Hinman Team

ACI 318 Appendix D provides a design procedure… not well suited for atypical loads such as those resulting from an explosive event.  In fact, Appendix D explicitly states that high cyclic fatigue or impact loads, like blast, are outside of its scope… Our hope is to encourage a collaborative effort with manufacturers and academia to develop a suitable design protocol that may be incorporated into future editions of ACI 318


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