Research

for an updated list of publications go  here

Publications
Conferences
Others
Acknowledgment

Journal Publications

2023

Modeling uncertainty of specimens employing spines and force-limiting connections tested at E-defense shake table.

Astudillo, B., Rivera, D., Duke, J., Simpson, B., Fahnestock, L., Sause, R., Ricles, J., Kurata, M., Okazaki, T., Kawamata, Y., Tao, Z., Qie, Y.

Earthquake Engineering and Structural Dynamics. 2023.

2021

Seismic performance of steel moment frames considering the effects of column-base hysteretic behavior and gravity framing system.

Torres-Rodas, P., Flores, F., Pozo, S., & Astudillo, B.

Soil Dynamics and Earthquake Engineering. 2021.

Objective Phenomenological Constitutive Law for Collapse Analyses in Distributed Plasticity Steel-Frame Models.

Pozo, S., Astudillo, B., Samaniego, E., Flores, F.

Journal of Structural Engineering. 2021.

Effective Modeling of Special Steel Moment Frames for the Evaluation of Seismically Induced Floor Accelerations.

Flores, F., Astudillo, B. & Pozo, S.

Journal of Structural Engineering. 2021.

Conferences proceedings

2024

Higher-mode response of braced frames with elastic spines subjected to modal pushover analysis.

Astudillo, B., Simpson, B.

World Conference on Earthquake Engineering, WCEE2024, Milan, Italy 2024.

2022

Numerical response estimations of a Frame-Spine-FLC system prior to experimental dynamic testing.

Astudillo, B., Rivera, D., Simpson, B., Fahnestock, L., Sause, R., Ricles, J., Kurata, M., Okazaki, T., Kawamata, Y., Tao, Z., Duke, J., Qie, Y.

The 10th International Conference on the Behaviour Of Steel Structures In Seismic Areas, Timisoara, Romania, 25- 27 May 2022

Design and Performance Comparison of Strongback Systems and Typical Chevron BRB Frames.

Astudillo, B., Panian, L., Simpson, B.

12th National Conference in Earthquake Engineering, Earthquake Engineering Research Institute, Salt Lake City, UT. 2022.

Frame-Spine System with Force-Limiting Connections for Low-Damage Seismic-Resilient Buildings

Fahnestock, L., Sause, R., Ricles, J., Simpson, B., Kurata, M., Okazaki, T., Kawamata, Y., Tao, Z., Duke, J., Rivera, D.,Astudillo, B., Qie, Y.

The 10th International Conference on the Behaviour Of Steel Structures In Seismic Areas, Timisoara, Romania, 25- 27 May 2022

2021

U.S.-Japan collaboration for shake table testing of a Frame-Spine system with Force-Limiting Connections.

Fahnestock, L., Sause, R., Ricles, J., Simpson, B., Kurata, M., Okazaki, T., Kawamata, Y., Tao, Z., Duke, J., Rivera, D., Astudillo, B., Qie, Y.

17th WCEE World Conference on Earthquake Engineering: Sendai, Japan 2021.

Full-Scale Seismic Stability Evaluation of a Frame-Spine System with Force-Limiting Connections.

Fahnestock, L., Sause, R., Ricles, J., Simpson, B., Kurata, M., Okazaki, T., Kawamata, Y., Tao, Z., Duke, J., Rivera, D., Astudillo, B., Qie, Y.

Proceedings of the Annual Stability Conference Structural Stability Research Council. Louisville, Kentucky.

2020

An Evaluation Of The Current Approaches And Recommendations For More Rational Approaches For Assessing The Seismic Torsional Stability Of Buildings.

Astudillo, B., Flores, F., Pozo, S., Charney, F.

Presented at the XI International Conference on Structural Dynamics, Athens, Greece.

Parametric Analysis And Comparison Of Models Used In The Analysis Of Steel Structures.

Astudillo, B., Pozo, S., Flores, F.

Presented at the XI International Conference on Structural Dynamics, Athens, Greece.

Gravity System Energy Dissipation Contribution In Seismic Performance Of Special Steel Moment Frames.

Flores, F., Pozo, S.,Astudillo, B., Vazquez, J.

Presented at the XI International Conference on Structural Dynamics, Athens, Greece.

Regularization Method To Include Material Softening In Fiber Beam-Column Elements For Seismic Performance Assessment Of Steel Frames.

, Samaniego, E., Flores, F., Astudillo, B.Pozo, S.

Presented at the XI International Conference on Structural Dynamics, Athens, Greece.

2019

Level of Detail Required to Model Special Steel Moment Frames to Evaluate Floor Accelerations in Nonstructural Components.

Flores F., Astudillo, B., Barrera, D.V., Jerves, R.A., Martinez, I.L., Pozo, S.P., (2019).

Structures Congress 2019.

2018

Structural behavior checks prior to performing nonlinear dynamic analysis.

Flores, F., Charney, F., Pozo, S., & Astudillo, B.

11th US National Conference on Earthquake Engineering (11NCEE). Los Angeles, CA.

Reports

Numerical Characterization and Modeling Uncertainty of Frame-Spine and Frame-Spine-FLC Full-Scale Specimens Tested at E-Defense Shake-Table.

Astudillo, B.

Master thesis. 2022.

Oregon State University, Corvallis, OR.

Modeling and Performance Analysis of a Steel Structure, considering deteriorations for collapse prediction.

Astudillo, B.

Undergraduate Thesis. 2018.

Universidad de Cuenca, Cuenca, Ecuador.

Other Presentations

Preliminary numerical analysis prior to a shake-table test of a Moment Resisting Frame with strongback columns and force limiting connections.

Astudillo, B., Simpson B.

EERI Annual Meeting. 2021. Poster Presentation.

Acknowledgment


I extend recognition to my colleagues, collaborators, and the various funding agencies and projects that have significantly contributed to my academic and research pursuits. This acknowledgment encompasses, but is not confined to:


Scholarships and Fellowships: Fulbright Program, Shah Fellowship.


Project: Analysis and design of multistory strongback frames

Funding agency: AISC

PI: Barbara Simpson

Project: Frame-Spine System with Force-Limiting Connections for Low-Damage Seismic-Resilient Buildings

Funding agency: U.S. National Science Foundation

CMMI 1928906, 1926326, and 1926365

PI: Larry Fahnestock.

CO-PI: Barbara Simpson, Richard Sause, James Ricles.

Additional Collaborators: Masahiro Kurata, Taichiro Okazaki, Yoshuke Kawamata, David Rivera, Jessica Duke, Zhuoqi Tao, Yi Qie.

Additional support:

Additional support is provided by the American Institute of Steel Construction, Nippon Steel Engineering, the Disaster Prevention Research Institute (DPRI) at Kyoto University, and JSPS KAKENHI Grant Number 20H00269. The research is also conducted in cooperation with a major Japanese research initiative, Enhancement of Resilience for Tokyo Metropolitan Area (P.I., Akira Nishitani, Waseda University), funded by the National Research Institute for Earth Science and Disaster Resilience (NIED). The support for the E-Defense test provided by many additional organizations and people is gratefully recognized: Nippon Steel, Nippon Steel Metal Products, Schuff Steel, Kouhei Hattori (Waseda University), Yoshihiro Nitta (Ashikaga University).


Simpson Research Group (2020-2023): Barbara Simpson, David Rivera, Gustavo Araujo, Akiri Seki, Dingbin Li.

Flores Research Group (2017-2020): Francisco Flores, Sebastián Pozo, Rubén Jerves, Ivanna Martinez, David Barrera, Sebastián Zambrano.

Colleagues from Blume Earthquake Engineering Center.


Personal Note.

I express sincere gratitude to my wife, parents, sister, and the rest of my family for their steadfast support and to academic mentors throughout my academic journey for their invaluable guidance.

I wish to extend profound appreciation to Professor Francisco Flores for his role in enlisting me as an undergraduate research assistant at Universidad de Cuenca, fostering my early exposure to numerical simulations, and encouraging my pursuit of graduate studies in the United States.

I am deeply thankful to Professor Barbara Simpson for graciously welcoming me into her research group and generously funding my graduate studies and research endeavors. Her successful grant applications from esteemed bodies such as the National Science Foundation (NSF) and the American Institute of Steel Construction (AISC) have enabled me to engage in meaningful and impactful research within my specialized domain, under her expert tutelage.

Views expressed on my personal website are my own.