Non-destructive evaluation at mission San Miguel - achievements and limitations
Title: Non-destructive evaluation at mission San Miguel - achievements and limitations
Author(s): D.W. Porter, R.W. Anthony
Paper category : conference
Book title: RILEM Symposium on On Site Assessment of Concrete, Masonry and Timber Structures - SACoMaTiS 2008
Editor(s): L. Binda, M. di Prisco, R. Felicetti
Publisher: RILEM Publications SARL
Publication year: 2008
Pages: 1169 - 1178
Total Pages: 10
Nb references: 7
Abstract: The San Simeon earthquake resulted in structural damage to the Mission San Miguel Arcangel, including the adobe church and sacristy (c.1818). The building’s interior retains an extraordinary level of integrity and significance, and interior plasters and woodwork are covered in an early decorative paint scheme. Many structural elements were displaced during the earthquake, and most wooden elements are deteriorated due to termite infestation, decay, and weathering.
Visual inspection of the woodwork provided qualitative information concerning the damage distribution. To better characterize section losses, representative elements were selected for detailed examination by resistance drilling and digital radioscopy; details of the digital radioscopy are presented in a companion paper at this conference . The representative survey allowed for a preliminary evaluation of member capacity and indicated the necessity of a systematic investigation.
The inspection technologies yielded a great deal of information that was useful in generating estimates of remaining sound wood, defining additional investigation needs, and designing broad treatment strategies. However, resistance drilling and digital radioscopy were only minimally useful in characterizing the condition of timber vigas embedded in the thick adobe walls and assessing termite damage in the painted ceiling decking. Quantification of section loss in embedded elements is critical in determining remaining structural capacity and for designing repairs, and will require additional investigative techniques and strategies.
Online publication: 2009-05-26
Publication type : full_text
Public price (Euros): 0.00
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