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About East Oregonian : E.O. (Pendleton, OR) 1888-current | View Entire Issue (Jan. 3, 2019)
NORTHWEST East Oregonian A2 Thursday, January 3, 2019 Building a better bridge to survive tsunamis in when designing for tsu- nami resilience. The finding is important, said Pedro Lomonaco and Solomon Yim, Oregon State researchers who contrib- uted to the study, because it can help engineers under- stand why bridges fail and lead to more tsunami-resis- tant bridges along the Ore- gon Coast. “The breaking of the bearing connections was the main type of bridge dam- age seen in recent tsunamis, showing that it’s critical to quantify what the tsunami is doing to these components and decipher the underlying physics,” Yim said. By BRENNA VISSER EO Media Group The way bridges are assessed for tsunami risk needs to be rethought, new research suggests. In a study published by Oregon State University and the University of Nevada, Reno, researchers found that previous assumptions about how force from a tsu- nami impacts bridge infra- structure don’t necessarily hold true. Most studies have only looked at the total force a tsunami puts on a bridge, rather than how force impacts individual compo- nents like girders, the hor- izontal beam that supports the deck, and bearings, the part that provides a resting surface between the col- umns and the deck. Standard girder bridges are built with the assump- tion that all of the stresses from a tsunami are being transmitted and absorbed through the foundation. The study found that dif- ferent types of force brought on by a sustained rush- ing wall of water actually transfers a large amount of pressure onto the support- ing parts of the bridge, like the girders, deck chambers, bearings and connections. These parts are not factored The irregular shape of traditional trusses and gird- ers also creates unaccount- ed-for turbulence, they said. In general, the wall of water should be moving in one direction, but when it has to go through trusses, the water weaves in and out, add- ing different hydrodynamic forces that can compromise the bridge’s stability. “The high pressure that developed under the bridge played a significant role on the stability of the bridge, and different mitigation measures were tested, from closing the gaps between girders to incorporating venting on the concrete deck,” Lomonaco said. Deadly examples The need to better under- stand wave impacts on coastal bridges was largely motivated by seeing bridges destroyed during tsuna- mis off Japan and Indone- sia. Over the past 15 years, big earthquakes have caused tsunamis that killed more than 250,000 people and caused more than $200 bil- lion in damage, the study estimates, washing away or dislodging hundreds of bridges. The research could help coastal cities like Seaside, which has several aging bridges that are expected to fail in a tsunami. The topic has been raised recently by City Councilor Tom Horning, a geologist who has long advocated ret- rofitting bridges as a top pri- ority for the city. With two major riv- ers to cross before getting to higher ground, having bridges that can last will be crucial to maintaining evac- uation routes. “Bridges are one of the easiest, fastest connection points to help people after an emergency,” Lomonaco Forecast for Pendleton Area TODAY FRIDAY SATURDAY SUNDAY MONDAY Cloudy Mostly cloudy Cloudy Snow or fl urries possible A thick cloud cover 46° 38° 50° 33° PENDLETON TEMPERATURE FORECAST 43° 35° 49° 45° 46° 36° HERMISTON TEMPERATURE FORECAST 45° 36° 52° 32° 43° 36° 47° 42° 46° 35° OREGON FORECAST ALMANAC Shown is today’s weather. Temperatures are today’s highs and tonight’s lows. PENDLETON through 3 p.m. yest. HIGH LOW TEMP. Seattle Olympia 52/46 38/35 45/32 Longview Kennewick Walla Walla 48/40 Lewiston 50/45 45/39 Astoria 53/46 Pullman Yakima 40/37 49/44 42/35 Portland Hermiston 52/45 The Dalles 45/36 Salem Corvallis 53/42 Yesterday Normals Records La Grande 36/31 PRECIPITATION John Day Eugene Bend 53/42 47/34 42/35 Ontario 35/24 Caldwell Burns 37° 20° 39° 27° 62° (1939) -7° (1979) 24 hours ending 3 p.m. Month to date Normal month to date Year to date Last year to date Normal year to date Albany 53/44 Boardman Pendleton Medford 47/30 0.00" 0.00" 0.08" 0.00" 0.00" 0.08" WINDS (in mph) 36/26 32/17 0.00" 0.00" 0.12" 0.00" 0.00" 0.12" through 3 p.m. yest. HIGH LOW TEMP. Pendleton 37/29 54/44 24 hours ending 3 p.m. Month to date Normal month to date Year to date Last year to date Normal year to date HERMISTON Enterprise 46/38 46/37 38° 23° 40° 26° 63° (1913) -9° (1924) PRECIPITATION Moses Lake 52/43 Aberdeen 38/35 37/33 Tacoma Yesterday Normals Records Spokane Wenatchee 53/46 Today Fri. SSW 4-8 SSE 7-14 SW 4-8 SW 6-12 said. “If you don’t have the bridges, there is nothing you can do.” To find answers, research- ers simulated a tsunami on a model bridge at the O.H. Hinsdale Wave Research Laboratory’s Large Wave Flume in Corvallis. Part of what researchers found was that most bridges are built too rigidly, Yim and Lomonaco said. Instead of seeing the concrete columns under a bridge as inflexible blocks, 42/23 Forecasts and graphics provided by AccuWeather, Inc. ©2019 Sunrise today Sunset tonight Moonrise today Moonset today Oregon shifts hepatitis A prevention efforts BEND (AP) — Oregon health officials are working to redirect hepatitis A pre- vention strategies toward homeless populations fol- lowing a shift in how out- breaks of the disease occur. The Bulletin reports the Oregon Health Authority has purchased additional hepatitis A vaccines this year, distributing them to county health departments in areas with large homeless populations. Previously, hepati- tis A outbreaks were mostly linked to interna- tional travelers or food- borne outbreaks, with infec- tions occurring mainly in children. Oregon has documented 20 cases of the disease through November 2018. Four of the cases last year involved people younger than age 40. The federal Centers for 7:36 a.m. 4:23 p.m. 5:23 a.m. 2:51 p.m. New First Full Last Jan 5 Jan 13 Jan 20 Jan 27 NATIONAL EXTREMES Yesterday’s National Extremes: (for the 48 contiguous states) High 88° in Immokalee, Fla. Low -38° in Daniel, Wyo. Buehler plans to stay engaged in Oregon issues SALEM (AP) — Repub- lican gubernatorial candi- date Knute Buehler, who lost the November elec- tion, says he’s repurpos- ing his campaign web site to highlight issues that con- cern him, including improv- ing the welfare of foster children. Buehler, who is now offi- cially out of politics since he didn’t seek re-election to the Oregon House of Represen- tatives in order to campaign for the governorship, said in a video message on Monday Shown are noon positions of weather systems and precipitation. Temperature bands are highs for the day. 0s showers t-storms Disease Control and Pre- vention recorded 1,521 cases of hepatitis A in 2017 from California, Ken- tucky, Michigan and Utah. Of those, 57 percent had reported drug use, home- lessness or both. As a result, the Advisory Committee on Immunization Practices rec- ommended in October add- ing homelessness to the list of reasons why some should be vaccinated. Hepatitis A is typically transmitted when someone ingests something that has been contaminated with the feces of an infected person. Symptoms include fever, fatigue, nausea, abdominal pain, dark urine, joint pain and jaundice. Most people recover with limited treat- ment, but complications can occur especially among peo- ple already in poor health. “The homeless popula- tion just seems like the per- fect setup for this transmis- sion,” said Dr. Paul Cieslak, medical director for com- municable diseases and immunizations at the Ore- gon Health Authority’s Pub- lic Health Division. “You’ve got people living without the benefit of running water and often without toilet or sewage.” Multnomah County was already routinely screen- ing people at its shelters for tuberculosis, and began offering the additional hepa- titis A vaccines provided by the state at the same time. “It really is a very effec- tive vaccine, so that’s been our main push,” said Lisa Ferguson, who oversees the county’s communicable dis- ease services team. “We’ve been trying to connect with homeless services providers and making sure people out in the field know what to be looking for.” BRIEFLY NATIONAL WEATHER TODAY -0s imagine them like springs. When the tsunami hits the deck of a bridge it will bend, making it vibrate both back and forth and up and down. The bridge deck and pil- ings not only feel the static forces coming from the earthquake and tsunami, but the additional pressure from these vibrations. “We are changing the paradigm ... to the con- cept of thinking about how a bridge is moving, chang- ing,” Yim said. Given how young the area of study is, more research is needed to under- stand why certain bridges survive and why others do not, the team says. But researchers hope the study gives engineers a bet- ter understanding of the physics of what happens when a tsunami slams into a bridge and opens the door to designing coastal spans that are better able to withstand giant waves. “Think back 10, 15 years ago, the tsunami was not even considered,” Yim said. “We’ve come a long ways.” SUN AND MOON Klamath Falls -10s More research The Daily Astorian/Colin Murphey Several bridges and roads in Seaside have been deemed potentially problematic in an earthquake and tsunami. 10s rain 20s flurries 30s snow 40s 50s ice 60s cold front E AST O REGONIAN — Founded Oct. 16, 1875 — 211 S.E. Byers Ave., Pendleton 541-276-2211 333 E. Main St., Hermiston 541-567-6211 Office hours: Monday through Friday, 8 a.m. to 5 p.m. Closed major holidays EastOregonian.com To subscribe, call 1-800-522-0255 or go online to EastOregonian.com and click on ‘Subscribe’ East Oregonian (USPS 164-980) is published daily except Sunday, Monday and postal holidays, by the EO Media Group, 211 S.E. Byers Ave. Pendleton, OR 97801. Periodicals postage paid at Pendleton, OR. Postmaster: send address changes to East Oregonian, 211 S.E. Byers Ave. Pendleton, OR 97801. Copyright © 2018, EO Media Group 70s 80s 90s 100s warm front stationary front 110s high low SUBSCRIPTION RATES Local home delivery Savings (cover price) $14.50 41 percent $173.67 41 percent $91.86 38 percent $47.77 36 percent *EZ Pay = one-year rate with a monthly credit or debit card/check charge Single copy price: $1 Tuesday through Friday, $1.50 Saturday Circulation Manager: Bonny Tuller, 541-966-0828 3 bullet-riddled bodies hidden near WA state home PORT ANGELES, Wash. (AP) — Authorities on Wednesday were investigat- ing the deaths of a man, his son and the son’s girlfriend whose bullet-riddled bod- ies were found concealed on a property known for host- ing transients in Washington state. Police discovered the bod- ies when they were sent to the home near the waterfront city of Port Angeles for a welfare check, the Peninsula Daily News reported. Investigators found the door to the home ajar and then found the bodies of Darrell C. Iverson, 57, and his son Jor- dan D. Iverson, 27, covered by tarps and debris in front of the house, Clallam County Sheriff Bill Benedict said. The elder Iverson owned the home, county documents say. CORRECTION: The Dec. 22 story “Realtors Board has equity in Agape House” incorrectly stated that the Columbia Basin Board of Realtors had collected money for the Agape House at the Peace and Goodwill Hermiston Community Christmas Con- cert. The board raised the money at its annual Christmas party. Subscriber services: For mail delivery, online access, vacation stops or delivery concerns call 1-800-522-0255 ext. 1 EZPay 52 weeks 26 weeks 13 weeks that he wants to highlight state budget and health care issues, and bring civility to politics. Buehler, an orthope- dic surgeon from the Cen- tral Oregon town of Bend, received roughly 815,000 votes compared to incum- bent Democratic Gov. Kate Brown’s 934,500. 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