Earthquake Engineering Research Institute
Learning From Earthquakes

Effect of 8.2 Mw Iquique Earthquake on Tall Buildings

An 8.2 Mw Earthquake struck the Chilean coast on April 1st. The epicenter was located 95km NW of Iquique. There are many 20+ story buildings in the affected area with similar characteristics than those affected in the last February 27th 2010 Maule’s earthquake, such as a high shear wall density and 20cm thick walls with none […]

Video: Taiwan Earthquake Reconnaissance Briefing Webinar

Briefing content was a collaboration from more than five teams that traveled to the impacted region, and provided key insights into the various aspects of shaking characteristics, earthquake damage, response, and performance of pre-event mitigation measures.     The topics discussed include: Geology & Seismology (6:00)by Kevin Clahan, Lettis Consultants International (representing GEER Team)Presentation PDF File […]

Clearinghouse Briefing #3 Report (Tuesday, August 26, 2014)

Clearinghouse Briefing #3 Summary Slideshow Below is a list of preliminary report-outs from discipline-based teams that were presented at the Clearinghouse briefing: Buildings: Commercial, Unreinforced MasonryTeam Members: Jonas Houston and Adam Azofeifa (Holmes Culley), and Brian Olson (Tipping Mar) with Badri Prasad (TTG), Andre Barbosa and Ben Mason (OSU), Alex Julius and Erik McAdams (EERI) Buildings: […]

2014 SEAOC Convention: Special Session on Napa Earthquake

 Some of the presentation slides from the speakers in this Special Session can be downloaded as PDF files from the list below. Damaged Unreinforced Masonry Buildings by Bill Tremayne, Holmes Culley Alexandria Hotel Seismic Retrofit by Craig Chamberlain, Nishkian Chamberlain SEAOC EPEP Deployment Following the American Canyon Earthquake by Scott M. Adan, Adan Engineering Performance of Non-Structural Components […]

Minor structural damage – RC Buildings

The Chilean building code has been improved every time an earthquake has occurred. Even though the implementation of the construction standards are severe and consequently expensive, when evaluating the damage after the last events, it has proved to be efficient for a country highly susceptible to earthquakes. According to the UN News Centre the UN Office for Disaster […]

Preliminary Assessment of Structural Performance – RC Buildings

Compared to the 8.8M earthquake in 2010, the 8.3M earthquake did not caused important structural damage on reinforced concrete buildings (RCB). However, two more facts helped to reduce the effects of the recent event:  the affected area is less densely populated and the energy released was a third of the 2010 earthquake, as explained in an article by Pascale Bonnefoy and Patrick J. […]

Illapel Earthquake: Housing

   Figure 1. Reinforced concrete building structures presenting substantial damage in the nonstructural components of the first and second floors owing to the tsunami. Coquimbo.   The dwellings in the affected area are mainly masonry structures (of one or two storeys), and the remaining dwellings are reinforced concrete structures, adobe structures and wood structures. Masonry structures […]