Welcome

This website summarizes data collected for the research project on NSF RAPID Post-disaster Structural Performance Data Collection following the 2015 Nepal Earthquake following the 2015 M7.8 Gorkha Earthquake (April 25, 2015) and its many aftershocks, including the M7.3 Sindhupalchowk Earthquake (May 12, 2015).

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Figure 1 - Soft-story collapse of reinforced concrete frame with infill building (Sindhupalchowk, Nepal). Credit: Andre Barbosa, June 12, 2015

The M 7.8 Ghorka Earthquake occurred at 11:56am local time in Nepal on April 25, 2015. This earthquake and the many aftershocks that followed significantly affected Nepal, causing significant human losses as well as widespread structural damage and ground failure. The building stock in the affected regions predominantly consists of poorly engineered unreinforced masonry buildings. However, approximately 25% of the buildings consist of reinforced concrete (RC) frames infilled with masonry walls.  This structural system was widely employed in the 1920's and 1930's in California as well as in the Pacific Northwest; hence, understanding their failure mechanisms has direct implications for a large number of buildings in metropolitan areas in the United States (US). 

This project focuses on post-earthquake assessment of existing RC building frames with masonry infill in Nepal. The goal of the research team is to perform detailed assessments of 25-30 buildings. The team will acquire, process, and archive architectural and structural data, including building drawings, in residential buildings and critical facilities such as schools and hospitals. The data will be obtained through traditional methods as well as geo-referenced, 3D, ground-based laser (GBL) scans and Structure from Motion (SfM), i.e. 3D reconstructions from 2D photographs, thus providing detailed, quantitative damage measurements. This collected data will provide new earthquake reconnaissance case studies of RC frame with infill buildings and can be used to evaluate current US guidelines for assessment of existing structures. Moreover, it will serve to inform local rebuilding and recovery efforts in Nepal though close collaboration with local agencies in Nepal.

This National Science Foundation funded RAPID includes participation from teams from several universities (see list below). The project team and its collaborators gathered data on structural performance of many structures from June 5 to July 8, 2015. The team worked closely with local agencies such as the National Society of Earthquake Technology (NSET) of Nepal, Khwopa Engineering College, and several local engineers that showed interest in participating in our effort. The team leveraged contacts established during the EU-NICE Erasmus Mundus program. The team included institutional support from the Pacific Earthquake Engineering Research (PEER) Center. 

The team includes the following members, which had the following tasks:

NSF RAPID Project Team:

 Dr. Andre Barbosa (PI)Dr. Mike Olsen (co-PI), Dr. Dan Gillins, Rajendra Soti, Patrick Burns, and Matthew Gillins; Tasks: Coordination, detailed structural assessment of RC frames with infill, ambient vibration testing; Equipment: Total GPS stations, Laser Scanning Equipment, Unmanned Aerial Vehicles (UAVs), 360 panoramic camera (Thanks to PEER), rebar scanners, Schmidt hammer, and PCB accelerometers and DAQ for ambient vibration testing (Thanks to Babak Moaveni, Tufts Univ.)

 Dr. Andreas Stavridis (co-PI) and Supratik Bose; Tasks:  Detailed structural assessment of RC frame with infill, ambient vibration testing; Equipment: Four Accelerometers for ambient vibration testing (Thanks to Babak Moaveni, Tufts Univ.)

NSF RAPID Project Collaborators:

Dr. Enrico Spacone, Dr. Giuseppe Brando, Davide Rapone; Tasks: Assessment of reinforced concrete structures and vulnerability aseessment of masonry structures. Equipment:  rebar scanners, Schmidt hammer, ultrasonic testing for concrete

 Dr. Rosario Giglioti and Dr. Marco Faggella; Tasks: Remote sensing and outreach

 Dr. Humberto Varum, Dr. Nelson Vila Pouca, Dr. Hugo Rodrigues, Andre Furtado, Joao Oliveira; Tasks Assessment of RC frames with infill, and monuments; Equipment: Three seismometers with data loggers and five accelerometers for measuring wall panel vibration characteristics

Dr. Richard Wood; Tasks:  Laser scanning and ambient vibration testing for assessment of RC frames with infill, vulnerability of historic centers, and monuments; Equipment: Laser scanning equipment and UAVs 

 Dr. Ramesh Guaragain, Surya Naryan Shrestha, Dev Kumar Maharjan

 Dr. Steve Mahin, Grace Kang Tasks:  Webinar support and database development support; Equipment lended to OSU: Panoramic 360 camera


NSF RAPID ACKNOWLEDGMENT OF SUPPORT AND DISCLAIMER:

This website is based upon work supported by the National Science Foundation under Grant No. CMMI - 1545632. Any opinions, findings, and conclusions or recommendations expressed in this website are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.