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| 1 | Testing and modeling of cyclically loaded rock anchors显示文摘The Norwegian Public Roads Administration(NPRA) is planning for an upgrade of the E39 highway route at the westcoast of Norway. Fixed links shall replace ferries at seven fjord crossings. Wide spans and large depths at the crossings combined with challenging subsea topography and environmental loads call for an extension of existing practice. A variety of bridge concepts are evaluated in the feasibility study. The structures will experience significant loads from deadweight, traffic and environment. Anchoring of these forces is thus one of the challenges met in the project. Large-size subsea rock anchors are considered a viable alternative. These can be used for anchoring of floating structures but also with the purpose of increasing capacity of fixed structures. This paper presents first a thorough study of factors affecting rock anchor bond capacity. Laboratory testing of rock anchors subjected to cyclic loading is thereafter presented. Finally, the paper presents a model predicting the capacity of a rock anchor segment, in terms of a ribbed bar, subjected to a cyclic load history. The research assumes a failure mode occurring in the interface between the rock anchor and the surrounding grout. The constitutive behavior of the bonding interface is investigated for anchors subjected to cyclic one-way tensile loads. The model utilizes the static bond capacity curve as a basis, defining the ultimate bond sbuand the slip s1 at τ_(bu). A limited number of input parameters are required to apply the model. The model defines the bond-slip behavior with the belonging rock anchor capacity depending on the cyclic load level(τ_(max) cy/τ_(bu)), the cyclic load ratio(R= τ_(min) cy/τ_(max) cy), and the number of load cycles(N). The constitutive model is intended to model short anchor lengths representing an incremental length of a complete rock anchor. | Joar Tistel Gustav Grimstad Gudmund Eiksund | 2017 | Journal of Rock Mechanics and Geotechnical Engineering2017，9，6： | 2 |
| 2 | Fatigue is not associated with vitamin D deficiency in inflammatory bowel disease patients显示文摘AIM To investigate if vitamin D deficiency is associated with fatigue in patients with inflammatory bowel disease(IBD).METHODS IBD patients were recruited from nine hospitals in the southeastern and western regions of Norway to participate in a multicenter cross-sectional study lasting from March 2013 to April 2014. Data were collected by interviews, from medical records and laboratory tests. The Fatigue Questionnaire(FQ) was used to measure fatigue. Linear and logistic regression models were applied to explore the possible association between vitamin D deficiency and total fatigue scores and chronic fatigue, respectively. The analyses were adjusted for age, gender, disease activity, depressive symptoms and sleep disturbance.RESULTS In total, 405 patients were included in the analyses, of which 227(56%) had Crohn's disease(CD) and 178(44%) had ulcerative colitis(UC). Vitamin D deficiency(< 50 nmol/L) was present in half(203/405) of the patients. Chronic fatigue was reported by 116(29%) of all included patients with substantial fatigue reported by 194(48%). Vitamin D levels were neither associated with total fatigue nor with chronic fatigue. Higher total fatigue scores and chronic fatigue were both associated with increased disease activity scores in patients with UC and CD, but not with increased CRP or fecal calprotectin. In UC patients, female gender was associated with fatigue in the univariate analysis, but no such difference was found when adjusted for elevated disease activity scores. Sleep disturbance and more depressive symptoms were associated with total fatigue scores in both UC and CD patients, but with chronic fatigue only in CD patients.CONCLUSION In this study, no significant association between fatigue and vitamin D deficiency in IBD patients was revealed. | Svein Oskar Frigstad Marte Lie Hoivik Jorgen Jahnsen Milada Cvancarova Tore Grimstad Ingrid Prytz Berset Gert Huppertz-Hauss Oistein Hovde Tomm Bernklev Bjorn Moum Lars-Petter Jelsness-Jorgensen | 2018 | World Journal of Gastroenterology2018，24，29： | 2 |
| 3 | Effect of different day and night temperature regimes on greenhouse cucumber young plant production, flower bud formation and early yield显示文摘 | GRIMSTAD O FRIMANSLUND E | 1993 | Scientia Horticulturae1993，53，3： | 1 |
| 4 | 99mTc-hexamethyl-propyleneamine oxime leukocyte scitigraphy and C-reactive protein levels in the differential diagnosis of brain abcesses显示文摘 | GRIMSTAD I A HIRSCHBERG H ROOTWELT K | 1992 | J Neurosurg1992，77，5： | 1 |
| 5 | Assessing medical students’attitudes towards learning communication skills:which components of attitudes do we measure显示文摘 | Anvik T Gude T Grimstad H | 2007 | BMC Med Educ2007，30，7： | 1 |
| 6 | Rock mass conditions dictate choice between NMT and NATM显示文摘 | BARTON N GRIMSTAD E | 1994 | Tunnels & Tunnelling1994，26，10： | 1 |
| 7 | Rock mass conditions dictate choice between NMT and NATM显示文摘 | Barton N Grimstad E | 1994 | Tunnels & Tunnelling1994，26，10： | 1 |
| 8 | Mosquitoes and the incidence of encephalitis 显示文摘 | Grimstad PR | 1983 | Adv Virus Res1983，28，： | 1 |
| 9 | Engineering geological characterizationof low strength anisotropic rocks in the Himalayan region for assessment of tunnel support 显示文摘 | Bhasin R Barton N Grimstad E Chryssanthakis P | 1995 | Engineering Geology1995，，40： | 1 |
| 10 | Rock mass conditions dictate choice between NMT and NATM 显示文摘 | Barton N Grimstad E | 1994 | Tunnels & Tunnel-ling1994，26，10： | 1 |
| 11 | 99mTc-hexamethylpropyleneamine oxime leukocyte scintigraphy and C-reactive protein levels in the differential diagnosis of brain abscesses显示文摘 | Grimstad IA Hirschberg H Rootwelt K | 2002 | J Neurosurg2002，77，： | 1 |
| 12 | Evidence for gas nuclei in decompressed rats 显示文摘 | Vann RD Grimstad J Nielsen CH | 1980 | Undersea Biomed Res1980，7，2： | 1 |
| 13 | Assessing medical students' attitudes towards learning communication skills-which components of attitudes do we measure?显示文摘 | Tor Anvik Tore Gude Hilde Grimstad | 2007 | BMC Medical Education2007，7，： | 1 |
| 14 | Comparison of predicted and measured performance of a large cavern in the himalayas显示文摘 | BHASHIN R K BARTON N GRIMSTAD E | 1996 | Int J Rock Mech Min Sci & Geomech1996，33，6： | 1 |
| 15 | Rock mass quality Q used in designing reinforced ribs of sprayed con- crete and energy absorption显示文摘 | Eystein Grimstad Kalpana Kankes Rajinder Bhasin | 2002 | 1-182002，118，： | 1 |
| 16 | Landslide hazards and mitigation measures at Gangtok, Sikkim Himalaya显示文摘 | Bhesin R Grimstad E Larsen J O | 2002 | Engineering Geology2002，64，4： | 1 |
| 17 | Dieta- ry supplementation of krill oil attenuates inflammation and oxidative stress in experimental ulcerative colitis in rats 显示文摘 | GRIMSTAD T BJORNDAL B CACABELOS D | 2012 | Scand J Gastroenterol2012，47，1： | 1 |
| 18 | Effect of different day and night temperature regimes on greenhouse cucumber young plant production, flower bud formation and early yield 显示文摘 | Grimstad O Frimanslund E | 1993 | Sci Hort1993，53，3： | 1 |
| 19 | Simultaneous CO2injection and water production to optimize aquifer storage capacity显示文摘 | Bergmo P S Grimstad A A Lindeberg E | 2011 | International Journal of Greenhouse Gas Control2011，5，4： | 1 |
| 20 | Assessing medical students' attitudes towards learning communication skillsCwhich components of attitudes do we measure显示文摘 | Tor Anvik Tore Gude Hilde Grimstad | 2007 | BMC Medical Education2007，7，： | 1 |
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