scholarly journals Effect of bonding or unbonding on seismic behavior of bridge elastomeric bearings: lessons learned from past earthquakes in China and Japan and inspirations for future design

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Nailiang Xiang ◽  
Yoshiaki Goto ◽  
M. Shahria Alam ◽  
Jianzhong Li

AbstractEconomical laminated elastomeric bearings are well-adopted options for load transmission components of bridges from superstructure to substructure. In most cases, the design of such elastomeric bearings primarily depends on the requirements from service-level conditions such as superstructure thermal movements, with little consideration of extreme loads like earthquakes. However, bridge elastomeric bearings are very likely to be subjected to earthquake hazards, particularly for bridges located in high seismic regions. This study presents an overview of the observed typical damages of bridge elastomeric bearings in the past major earthquakes mainly in China and Japan. Comparisons of different damage patterns are conducted based on the different installations of bridge elastomeric bearings (bonding or un-bonding). The effect of bearing installation methods on the overall seismic behavior of bridges is also discussed. A desirable installation method for bridge elastomeric bearings against strong earthquake loads is recommended, which is expected to overcome the critical limitations of current design practice.

2020 ◽  
Author(s):  
Patricia O'Campo ◽  
Alisa Velonis ◽  
Pearl Buhariwala ◽  
Janisha Kamalanathan ◽  
Maha Awaiz Hassan

BACKGROUND The popularity of mHealth technology has resulted in the development of numerous applications for almost every type of self-improvement or disease management. M- and e-health solutions for increasing awareness about and safety around partner violence is no exception. OBJECTIVE These applications allow women to control access to these resources and provide unlimited, and with the right design features, safe access when these resources are needed. Few applications, however, have been designed in close collaboration with intended users to ensure relevance and effectiveness. METHODS We report here on the design of a pair of evidence-based m- and e-health applications to facilitate early identification of unsafe relationship behaviors and tailored safety planning to reduce harm from violence including the methods by which we collaborated with and sought input from population of intended users. RESULTS The demographic characteristics of those who participated in the various surveys and interviews to inform the development of our screening and safety-decision support app are presented in (Table 2). CONCLUSIONS Finally, we share challenges we faced and lessons learned that might inform future design efforts of m- and e-health evidence-based applications.


2021 ◽  
Vol 41 (5) ◽  
pp. e17-e25
Author(s):  
Deborah Hurley ◽  
Sarah M. Gantz ◽  
E. Kate Valcin ◽  
Tara L. Sacco

Topic The development of the Critical Care Beacon Collaborative to achieve meaningful recognition. Clinical Relevance Recognizing nurses for contributions to their work environment and care delivery is important for their professional and personal fulfillment, job satisfaction, and retention; such recognition can occur at the individual, unit, or organizational level. The American Nurses Credentialing Center’s Magnet Recognition Program acknowledges nursing excellence at the organizational level. It would, however, be difficult for an organization to achieve Magnet designation without nursing excellence at the unit level. To recognize excellence at the unit level, the American Association of Critical-Care Nurses developed the Beacon Award in 2003. Objective To describe one academic medical center’s journey toward winning Beacon Awards across 8 units within the adult critical care service. Content Covered The Critical Care Beacon Collaborative resulted in a Beacon Award for each unit and important staff outcomes. This article describes the organization, the process before the Critical Care Beacon Collaborative convened and the desired state, and the methods used to achieve our goal. It also discusses unit- and service-level stakeholder involvement. The successes, lessons learned, sustainability, and growth of the Critical Care Beacon Collaborative are shared to assist readers who aspire to pursue a Beacon Award.


2019 ◽  
Vol 11 (4) ◽  
pp. 977 ◽  
Author(s):  
Yu Bai ◽  
Jing Gao ◽  
Adrian Pitts ◽  
Yun Gao ◽  
Wenfeng Bai ◽  
...  

The Southwest provinces of China are locations with a rich variety of different dwelling design typologies based on traditional cultures and ethnic groups. In this area, the Province of Yunnan has many such dwelling types, and it is also an area with most frequent earthquakes in China. The seismic problems of housing structure must therefore be solved as part of the study on sustainable development of villages to provide relevant advice for future design options. This paper reports research, which evolved over a ten-year period that deals with the seismic capacity of residential buildings. Simulations using shaking table tests were carried out to assess the performance of traditional residential structures as well with the impacts of material modifications and the structural strengthening of common residential building components found in Yunnan. Relevant and pertinent construction technology solutions that could enhance the seismic capacity of residential buildings and act as innovative improvements for the sustainability of rural dwellings are suggested.


1997 ◽  
Vol 13 (1) ◽  
pp. 25-44 ◽  
Author(s):  
Paul C. Jennings

Twenty-five years have passed since the San Fernando earthquake of February 9, 1971. The paper reviews the lessons learned and not learned from this notable event. Most of the major lessons were reported within a few weeks of the earthquake by a panel appointed by the National Academies of Sciences and of Engineering. In this paper, the status of each of the eighteen general lessons cited by the panel is reviewed, plus two additional lessons selected from other studies of the earthquake. The lessons learned ranged broadly and concerned measures needed to reduce future earthquake hazards, as well as recommended scientific and engineering efforts. Although all of the lessons learned were not heeded, the San Fernando earthquake represented a turning point in public awareness and in actions taken to reduce earthquake hazard. Recent earthquakes have shown, however, that much remains to be done.


2017 ◽  
Vol 21 (4) ◽  
pp. 315-332
Author(s):  
Seon-Joo Kim

CAMPUS Asia (Collective Action for Mobility Program of University Students in Asia) is a student-exchange program designed to promote student mobility between South Korea, China, and Japan. Begun in 2011, the program aims to foster the next generation of leaders in Asia by nurturing young talents with shared visions. This article provides an overview of the CAMPUS Asia pilot program and the major findings of its comprehensive process evaluation in Korea using five criteria. The evaluation indicates that the CAMPUS Asia program has evolved into a unique program that promotes dual degrees, creates new learning models, and develops in-depth discussions of substantial collaborations among consortia. The need to develop mechanisms for applying the lessons learned and insights gained through the evaluation is addressed; implications and recommendations for sustainable development of the CAMPUS Asia pilot program are offered, as are the benefits of implementing a process evaluation in one’s own practice.


2014 ◽  
Vol 13 (2) ◽  
pp. 15-27
Author(s):  
DELIA NORTH ◽  
IDDO GAL ◽  
TEMESGEN ZEWOTIR

This paper aims to contribute to the emerging literature on capacity-building in statistics education by examining issues pertaining to the readiness of teachers in a developing country to teach basic statistical topics. The paper reflects on challenges and barriers to building statistics capacity at grass-roots level in a developing country, based in part on lessons learnt from the design of an in-service intervention for teachers in South Africa, and on illustrative data about teachers’ attitudes, collected as part of this intervention. The paper reflects on implications for future design of interventions, as well as on research needs that can inform future capacity-building in statistics education in developing countries. First published November 2014 at Statistics Education Research Journal Archives


2019 ◽  
Vol 142 (7) ◽  
Author(s):  
John Meluso ◽  
Jesse Austin-Breneman ◽  
Jose Uribe

Abstract Communication has been shown to affect the design of large-scale complex engineered systems. Drawing from engineering design, communication, and management literature, this work defines miscommunication as when communication results in a “deficiency” or “problem” that hinders parties from fulfilling their values. This article details a consequential example of miscommunication at a Fortune 500 engineering firm with the potential to affect system performance. In phase 1, interviews with engineering practitioners (n = 82) identified disagreement about what constitutes a parameter “estimate” in the design process. Phase 2 surveyed engineering practitioners (n = 128) about whether estimates communicated for system-level tracking approximate “current” design statuses or “future” design projections. The survey found that both definitions existed throughout the organization and did not correlate with subsystem, position, or design phase. Engineers inadvertently aggregated both current and future estimates into single system-level parameters that informed decision-making, thereby constituting widespread or systemic miscommunication. Thus, even technical concepts may be susceptible to miscommunication and could affect system performance.


Safety ◽  
2019 ◽  
Vol 5 (4) ◽  
pp. 80 ◽  
Author(s):  
Bedon ◽  
Amadio ◽  
Noé

Glass is largely used in buildings, in the form of an innovative and versatile material. Both for novel and existing constructions, secondary glass systems are frequently realized to interact with primary components of different materials. In most cases, the structural challenge deriving from the intrinsic brittleness and vulnerability of glass is efficiently controlled via laminated (LG) multi-layer sections. However, further potential risks for people should be properly minimized, like for example, in the presence of extreme loads. This is the case of seismic regions, where dedicated calculation methods are required to accommodate displacement and resistance demands, but design specifications are rarely provided by existing standards for earthquake resistant buildings. Even more attention is needed for frameless glass systems in which the bracing members (i.e., continuous frames, cable-nets, etc.,) are reduced to a minimum, in favour of metal point connections (i.e., bolts and mechanical fixings, friction clamps, etc.). This paper aims at discussing the current design requirements for the seismic performance assessment of these relatively simple but challenging structural solutions, with careful consideration for the Italian scenario, where a practical support for design can be found in the CNR-DT 210/2013 technical document. Based on a case-study system, major issues, open questions and uncertainties or critical aspects for the seismic analysis and design of secondary frameless glass assemblies are thus emphasized.


2020 ◽  
Vol 5 ◽  
Author(s):  
Gulsan Ara Parvin ◽  
Reazul Ahsan ◽  
Md. Habibur Rahman ◽  
Md. Anwarul Abedin

During all critical incidents, the media frame our understanding and create powerful forces at both individual and societal levels. The mental health of readers and viewers can also be affected by the media after tragic events. Potentially, the media have a proactive role in shaping the actions of the mass population and thereby influencing policy actions. The print media especially are considered a key avenue for taking information to the masses. However, in this information and communications technology (ICT) era, people are increasingly reluctant to carry hard-copy newspapers, instead preferring e-newspapers. At the present time, entire newspapers, and especially their opinion sections, are deluged by concerns about the novel coronavirus disease 2019 (COVID-19) pandemic. After China and Japan first encountered COVID-19, other Asian countries began their COVID-19 fight at different times between January and March 2020. All affected countries sought to manage the pandemic in their own way, following lessons learned from China and Japan. Every form of media in affected countries highlighted concerns by presenting news, perceptions, and opinions related to the pandemic. With opinion sections and editorials, the key sections of e-newspapers to reflect experts' perceptions and thoughts, this study aims to examine experts' views in the e-newspapers of five different countries in Asia, in relation to China and Japan. Considering the diversity of socioeconomic and geopolitical settings, five countries—South Korea, Singapore, Iran, India, and Bangladesh—are selected, each represented by one leading English-language e-newspaper. This study explores how experts' perceptions in the studied countries present different aspects of life. It also examines which e-newspaper emphasized which aspect of life and in which period of the outbreak. By intensive text mining in each selected e-newspaper, the study found that experts' opinions addressed diverse issues with regard to COVID-19. These issues are grouped under the following eight categories: health and drugs, preparedness and awareness, social welfare and humanity, the economy, governance and institutions, politics, the environment and wildlife, and innovation and technology. This pioneering study of five different e-newspapers in Asian countries from January to March 2020 presents a similar picture of experts' concerns and their roles in shaping responses to health crises; thus, it plays a role in contributing to policy actions.


2014 ◽  
Vol 709 ◽  
pp. 190-195
Author(s):  
Alexander M. Belostotsky ◽  
Andrei S. Pavlov

This article reviews the experience of modeling and evaluation stability of braced shell with elastomeric bearing under static, seismic and extreme loads.


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