Simpson Strong-Tie Fellow Update: Adventures into Safer Building in Indonesia

by Dr. James Mwangi, Simpson Strong-Tie Engineering Excellence Fellow 2017-18

Arriving on the other side of the Pacific

The journey to Padang, Indonesia started on August 3rd, 2017 in San Francisco, California with connections in Manila, Philippines and Jakarta, Indonesia. I arrived exhausted but excited in Padang on August 5th after almost 24 hours in the air. Padang is the provincial capital of West Sumatra and lies just south of the equator.

Technology in Post-Disaster Reconstruction: How One Woman is Contributing to Thousands of Safer Homes in Nepal

Women are leading the way towards the recovery of earthquake-affected communities in Nepal. Nearly 750,000 buildings were damaged or destroyed in the earthquakes in early 2015, leaving families in temporary shelters and students learning in makeshift school buildings. Rebuilding this infrastructure so that it does not collapse again in a future earthquake takes more than just bricks and money. Access to professional engineers and trained builders, along with other information on safe building techniques,

Surigao, Philippines: Examining Damages after the 6.7-magnitude Earthquake on February 10, 2017

From February 23 to February 25, 2017, Carl and Linnel from our engineering team in the Philippines performed post-earthquake reconnaissance following the 6.7 earthquake in Surigao Del Norte, on the north side of the island Mindinao. The team investigated and documented the response of rural school buildings and informal urban housing in the area, which will help inform our retrofit efforts in Manila and further our understanding of the seismic vulnerability of school buildings. The highest concentration of damaged housing exists in Surigao City,

Day 3 & 4: Manta, Crucita and Portoviejo- A Look at Mixed Use Buildings and Sharing Knowledge

On May 3rd, we went with Gen. Ruiz and Ing. Flores into the barricaded area of Manta, the neighborhood of Tarqui.  This area had the most damage and was a mix of large to small commercial buildings and hotels, plus multi family and single family houses (some mixed use).

Many of the small and medium sized buildings that had collapsed were already demolished and some were being taken down while we were there.

Day 2 (Part 2): Canoa and Jama- Analysis of Damaged Homes and Schools

After Canoa, we next headed north to Jama, another coastal town.  In Jama we selected a street in town and compared the building type and performance of each, one-by-one.  There were 7 houses, some with commercial space below.  Six houses were wood framed, 2-stories, and one was reinforced concrete, 3-stories.

Of the wood framed, 5 had masonry infill at the ground floor and 1 had bamboo lath with plaster overlay at the ground floor. 

Day 2: Canoa and Jama- A First Look at Damaged Schools

This morning we met with Ing. Hermel Flores, owner of Hermel Flores Construcciones and former chair of the Ecuatorian Chamber of Construction, and General Florencio Ruiz Prado, Director of Citizen Security for Manta, in Manta.  We discussed our activities, the situation and the presentation they coordinated for us to give on Tuesday and Wednesday, in Manta and Portoviejo, respectively.

Ing. Flores traveled with us next up north towards the epicenter.  The coast of Ecuador is in the highest seismic zone of the country. 

Day 1: Guayaquil to Manta- A First Look at Damaged Houses

May 1st was our first full day in Ecuador, after landing in Guayaquil on April 30.  Our team has three members: Traveling from our Bogota office there is Juan Caballero, architect and Director of Programs and Partnerships for Latin American, and Walter Cano, structural engineer and Project Engineer for Colombia.  From the U.S./headquarters there is Lizzie Blaisdell, structural engineer and Director of Engineering.

In Guayaquil, we saw little evidence of an earthquake.  According to the preliminary report on the Instituto Geofisico website (http://www.igepn.edu.ec/) a strong motion sensor near Guayaquil,

Retrofit evaluations in Haiti

Our staff is still evaluating houses for retrofit in Port-au-Prince. We’re currently doing evaluations in Kanpèch. These evaluations help us determine what interventions a structure needs in order to be earthquake-resistant.

 

Bad construction practice is everywhere

Look at the top of the wall. The decision to lay the top course of blocks on its side for extra ventilation was an extremely bad one, making it so the seismic load in the roof slab has no competent load path to the shear wall below. In the retrofit evaluation our engineers give this wall no credit for seismic resistance–it will have to be fixed.