In order to develop seismic damage functions and to ultimately understand losses due to cripple wall and sill anchorage failure, it is essential to have a robust assessment of their physical performance and the impact their response will have on (a) other structural elements in the load path; and (b) the superstructure including both its structural and nonstructural components. Past cripple wall tests have shed some light on this issue; however, in totality the experimental dataset is sparse and needs to be supplemented to provide the necessary information for numerical model calibration, which can then be used for conducting an extensive nonlinear time history analyses campaign and subsequently generating damage loss functions for loss analyses.
The objectives of the Task 4 experimental testing program are to fill the gaps in knowledge identified above and to provide physical data for validating numerical models and characterizing damage states essential for developing damage functions.
Collectively, the proposed cyclic tests of wood-frame structural components and subassemblies are devised to produce high-fidelity data to also support the evaluation and cost-benefit analysis of the FEMA P-1100 prestandard developed by the ATC-110 project.
Quasi-static cyclic testing of components and subassemblies (Small Component Testing) will be conducted. Performance data (measurements, photographic, and video documentation) of the response of the cripple wall components with a variety of variants and including unretrofitted and retrofitted detailing will be recorded.
Reports:
Schiller B., Hutchinson T.C., Cobeen K. (2020). Cripple wall small-component test program: Wet specimens I, PEER Report No. 2020/16, Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA.
Schiller B., Hutchinson T.C., Cobeen K. (2020). Cripple wall small-component test program: Dry specimens, PEER Report No. 2020/17, Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA.
Schiller B., Hutchinson T.C., Cobeen K. (2020). Cripple wall small-component test program: Wet specimens II, PEER Report No. 2020/18, Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA.
Schiller B., Hutchinson T.C., Cobeen K. (2020). Cripple wall small-component test program: Comparisons, PEER Report No. 2020/19, Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA.
Schiller B., Hutchinson T.C., Cobeen K. (2020). Comparison of the response of small and large component cripple wall specimens tested under simulated seismic loading, PEER Report No. 2020/21, Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA.
LINK TO DATA
Quasi-static cyclic tests of diaphragm-cripple Wall subassemblies (Large- Component Testing) will be conducted. Performance data (measurements, photographic, and video documentation) of the earthquake response of assemblies including cripple walls and an occupied story above, with direct comparisons of un-retrofit and retrofit configurations, will be provided.
Reports:
Cobeen K., Mahdavifar V., Hutchinson T.C, Schiller B., Welch D., Kang G., Bozorgnia Y. (2020). Large-component seismic testing for existing and retrofitted single-family wood-frame dwellings, PEER Report No. 2020/20, Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA.
Appendices A, B, C, D
Schiller B., Hutchinson T.C., Cobeen K. (2020). Comparison of the response of small and large component cripple wall specimens tested under simulated seismic loading, PEER Report No. 2020/21, Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA.