Resilient Design Research Articles

Designing for climate change: twenty-five design features to improve sanitation technology resilience in low- and middle- income countries

AbstractClimate change is exacerbating events such as floods and droughts, and trends including sea-level rise, leading to failures in sanitation technologies, increased public health risks and environmental pollution. To reduce these risks, it is crucial to incorporate climate resilience into sanitation technology designs. In this study, we reviewed academic and selected grey literature and identified 25 design features that can contribute to the technology’s resilience to an increasingly volatile and extreme climate. Design features that were conceptually similar were collated into seven categories. These categories included: (i) avoid exposure to hazards, (ii) withstand exposure to hazards, (iii) enable flexibility, (iv) contain failures, (v) limit consequences of complete failure, (vi) facilitate fast recovery and (vii) features that provide resilience benefits beyond technological resilience. In this paper we define the categories and design features, and provide examples of each feature in practice. We also outline how the resilience design features can support sanitation designers and implementers to critique the climate resilience of sanitation technology, and prompt more resilient designs of sanitation technology.

Climate Change Mitigation and Adaptation in Ghana: Strategies and Challenges Faced by Social Enterprises

This research examined how social enterprises mitigate and adapt to climate change in Ghana, examining their strategies and challenges. The study adopted a descriptive research design and involved 379 social enterprises. Questionnaires were administered online, and data were analysed using descriptive statistics and a mean value ranking analysis. The findings revealed that the key strategies employed in climate change mitigation and adaptation include creating new funding models, promoting sustainable agriculture and food systems, forming strategic partnerships and networks, and implementing community-based renewable energy systems. The significant challenges in addressing climate change include competition from large organisations, cultural perspectives towards climate change, policy volatility, and lack of adequate technical skills. Hence, the study recommends developing specialised funding programmes for climate-focused social enterprises, climate change education and awareness campaigns, and capacity building to upgrade technical competencies in clean technologies and climate resilience design.

Unirrigated extensive green roofs in humid subtropics – Plant selection and substrate design for low maintenance and climate resilience

Low-maintenance extensive green roofs hold the potential for adapting to climate change, but there is a limited understanding of their effective design in humid subtropical regions. In this study, we aimed to investigate low-maintenance green roof ecosystems capable of thriving under heat stress. Plant growth performance was evaluated in the second year of an experimental green roof in southwest China. This green roof was unirrigated and involved two plant communities (forbs and grasses) cultivated in four substrate types. Metrics of growth performance, including plant survival, green coverage, visual appearance, leaf stomatal conductance, and substrate volumetric water content were used to analyze the impact of substrate on plant growth. ESP substrate, comprising 30 %v (percent of volume) expanded shale, 25 %v perlite, 25 %v vermiculite, and 20 %v compost, featured the highest porosity and optimal growth of forbs, achieving an average green coverage of 66.76 % and average visual appearance value of 3.56 throughout the monitoring period. The high total porosity of this substrate could be critical in facilitating root development and drainage. Moreover, during the summer’s heat and drought, while substrate water content is not a limiting factor for the survival of some established forbs, it remains crucial for the growth of grasses. Additionally, the same substrate impacts different plant communities variably. Four particularly well-performing forb species, namely Lycoris chinensis, Tradescantia pallida, Liriope muscari, and Salvia farinacea, demonstrated survival rates closed to 100 % and an average visual appearance value exceeding 3 was noted, and thus, they are recommended as plant candidates for unirrigated green roofs. The distinguished performance of these species is attributable to their adaptation to heat and drought through specific physiological traits. Our findings provide insights into vegetation selection and substrate optimization for the successful establishment of extensive green roofs that could be feasibly developed without irrigation in the humid subtropical regions.

Fire futures: design for community-led resilience

ABSTRACT The increasing threat of catastrophic wildfires (referred to as bushfires in Australia) highlights the need for both governments and communities to collectively develop strategies for resilience. The principle of shared responsibility suggests a way forward, however, in practice residents and agencies often have contrary understandings of what sharing means in practice and asymmetric distributions of power can curtail community initiatives. Meanwhile, a focus on life and property does not account for broader issues of environmental health. This article details research that aimed to design media to support community-led fire management among two communities north-west of Brisbane, Australia. Findings from in-depth interviews and a codesign workshop reveal a need for more effective communication with residents, greater transparency from agencies, and a desire to better understand the role of fire in the local environment. We present design concepts targeted to foster engagement and action towards a fire-resilient future. The project reveals opportunities to conceive shared responsibility as a process of negotiating action between communities, agencies, and government and to extend the principle beyond people to the environment. We see the landscape as a dynamic actor in the process of sharing responsibility. Key policy highlights The concept of shared responsibility can be understood as a process of negotiating action between communities, agencies and the natural environment. In the context of wildfire resilience, the natural environment is a dynamic participant in the process of sharing responsibility. Participatory processes of community engagement could support the renegotiation of responsibilities that are jointly owned between citizens and government. A changed narrative about shared responsibility for the natural environment by agencies and communities could realign priorities and help establish alternative practices.

The relationships between resilience and child health behaviors in a national dataset.

Resilience mechanisms at the individual, family, and environmental levels may improve health outcomes despite potentially harmful stress exposure partly through the practice of positive health behaviors. We performed a secondary analysis of 2016-2021 National Survey of Children's Health data to assess the relationships between three resilience domains - child, family, neighborhood - and six health behaviors using multiple regression models adjusted for the other resilience domain(s) and potential confounders. Analysis revealed significant associations between each resilience domain and multiple health behaviors in a total weighted analytic sample of 70,156,540 children. For each outcome, the odds of better health behaviors were highest with high resilience in all possible domains. For example, among children ages 0-5 years, the adjusted odds of having "good quality" vs. "poor quality" sleep for those with "high" resilience in all domains were 2.21 times higher (95% CI 1.78, 2.63) than for those with "low" resilience in all domains. This line of research may help to inform the design of resilience and health behavior promotion interventions by targeting multiple socio-ecological domains of influence to improve health and development outcomes in children exposed to experiences or sources of potential stress. This study assessed the associations between three socio-ecological resilience domains (child, family, and neighborhood) and six child and family health behaviors in a national dataset. Resilience exists within multiple socio-ecological levels and supports healthy functioning despite experiencing stress. Studies in adults and limited pediatric sub-populations show associations between resilience and health behaviors, which in turn influence numerous health outcomes. Resilience at three levels of socio-ecological levels was found to be associated with the performance of multiple child and family health behaviors in a nationally representative general pediatric population. These findings have important implications for child and family health promotion efforts.

Optimising building performance for a resilient Future: A Multi-Objective approach to Net Zero energy strategies

The escalating impacts of climate change on urban environments underscore the imperative for energy-efficient buildings. As the building sector constitutes approximately 40% of global energy consumption, the implementation of NZE designs is critical for emission reduction. This study utilised Building Performance Optimisation methodologies alongside a multi-stage optimisation framework to evaluate energy consumption, Life cycle cost and carbon emissions under various climate scenarios (RCP 2.6, 4.5, and 8.5) in three Algerian cities—Constantine (semi-arid), Algiers (Mediterranean), and Ghardaïa (arid).The results revealed that the integration of passive, active, and renewable energy strategies significantly curtailed energy consumption and CO2 emissions across different climatic contexts. Specifically, passive measures achieved reductions in energy use ranging from 39% in Ghardaïa to 15% in Constantine. Active systems, including high-efficiency HVAC technologies, resulted in energy savings of 59% in Ghardaïa, 52% in Algiers, and 47% in Constantine. Furthermore, renewable energy sources, with a focus on solar photovoltaics, contributed additional reductions: 44% in Algiers, 26% in Ghardaïa, and 20% in Constantine. The multi-stage optimisation approach also enhanced computational efficiency, significantly reducing simulation time and facilitating the rapid identification of optimal strategies.These findings highlight the efficacy of integrating a range of energy strategies to achieve NZE. Nevertheless, while these systems demonstrate robust performance under current conditions, their effectiveness diminishes under future climate scenarios, underscoring the necessity for adaptive and resilient design approaches. Ongoing optimisation and innovation will be essential to maintaining the efficacy of NZE strategies in the face of extreme future climate conditions.

Designing for Resilience: Principles for Building Organizational Adaptability

Organizational disruptions from events like the COVID-19 pandemic have demonstrated the importance of resilience - an organization's ability to anticipate risks, maintain core functions during crises, and adapt successfully. This article outlines eight design principles that research indicates can help build resilience into an organization's structures, systems, culture and operations. Drawing from literature in fields like organizational development, crisis leadership and strategic management, the principles focus on distributing leadership and information sharing; promoting flexible, modular designs; ensuring redundancy of critical resources; cultivating a learning culture; maintaining flexible funding and resources; conducting scenario planning and training; fostering strategic partnerships; and taking an adaptive approach to goals. The principles are grounded in academic research but presented through the lens of a practitioner's consulting experience. The article also discusses practical strategies for applying the resilience design framework to assess risks, strengthen crisis response capabilities, and nurture continuous organizational learning and adaptation.

Climate-responsive wada architecture: a bioclimatic design for climate change resilience

ABSTRACT With rising living standards and a growing global population, the energy consumption of buildings is predicted to soar. Energy efficiency and occupant comfort may both be enhanced by constructing buildings with climate-sensitive design principles in mind. The traditional architectural style of a given region, known as vernacular architecture, has changed throughout the years to accommodate the local climate. One example of a vernacular style of building that made use of climate-responsive design to produce energy-efficient and aesthetically pleasing structures is the Wada style, which is located in the Pune region of India. The performance of the traditional Wada House envelope and its thermal characteristics are being researched in this study. This study investigates the thermal performance of traditional Wada houses, utilizing simulation models, validation, and analyzing climate change scenarios for 2050 and 2080. Research shows that passive design principles are widely used in Wada architecture to control inside temperatures and cut down on energy usage. Insulation through thick walls and roofs, orientation to reduce solar heat gain, and natural ventilation are all part of these measures.

Affordable housing and resilient design: Preparing low-income housing for climate change impacts

This paper presents a comprehensive framework for integrating resilient design principles into affordable housing to prepare low-income housing to withstand the impacts of climate change. The framework emphasizes the need for architectural strategies that enhance flood resistance, energy efficiency, and disaster preparedness, specifically tailored to the unique challenges faced by low-income communities. Through a detailed analysis of resilient design principles and practical examples from successful projects, the paper highlights the significance of resilient housing in promoting sustainability and protecting vulnerable populations. The paper also addresses the challenges in implementing resilient design, including financial, regulatory, and technical barriers. It explores opportunities for advancing these practices through innovative solutions, emerging technologies, and supportive policies. Recommendations are provided for policymakers, architects, and developers, focusing on fostering collaboration and community engagement. Additionally, the paper identifies key areas for future research to further refine and expand the application of resilient design in affordable housing. Ultimately, this work contributes to the ongoing discourse on sustainable housing by proposing actionable strategies to enhance the resilience of affordable housing in the face of climate change. Keywords: Resilient Design, Affordable Housing, Climate Change Adaptation, Flood Resistance, Energy Efficiency, Sustainable Architecture

Damage-free self-centering steel columns incorporating SMA bolts and replaceable steel angles

Steel moment-resisting frames (MRFs) are one lateral force-resistant structural system commonly used in high seismicity areas. The current seismic design practice for MRFs expects to develop plastic hinges at the beam ends to dissipate earthquake input energy. Meanwhile, plastic hinges also form almost unavoidably at the column bases of the first story due to the strong-base-weak-column design philosophy. However, concentrated deformation in the predetermined plastic hinges may lead to considerable damage in structural components. The accompanying large residual drifts can substantially compromise post-earthquake reparability and normal functionality. Hence, this paper presents a novel type of self-centering (SC) steel column base incorporating shape memory alloy (SMA) bolts and replaceable steel angles as a damage-free solution. First, the working principle of the column bases is described. Subsequently, the seismic performance of the steel columns is experimentally evaluated by considering the influences of the steel angles and repeated loading scenarios, and the replaceability of steel angles. Results show the novel steel column bases exhibit satisfactory flag-shaped hysteresis loops with excellent SC capability and stable energy dissipation, whereas almost all the damage is concentrated in the steel angles that can be replaced rapidly after the cyclic loading if required. The deformed columns are restored to their upright positions instantaneously with negligible residual deformation after unloading. More importantly, the steel column stays damage-free, and the SMA bolts with prestrain remain tightened. This enables the steel columns to maintain high functionality to withstand immediate aftershocks or future earthquakes, explicitly achieving seismic resilient design.

Environmental Impacts of the China-Pakistan Economic Corridor (CPEC): An analysis of Climate Change Mitigation and Adaptation Strategies

This article explores the complex environmental impacts of the China-Pakistan Economic Corridor (CPEC) and suggests sustainable development strategies. Our study reveals significant changes in land use patterns, including loss of important habitat, which is contributing to biodiversity decline. Analysis of air quality data shows increased levels of pollutants in urban areas along the corridor, which are exacerbated by construction activity and increased traffic. Water resource assessments highlight issues related to quality and availability, especially in areas with high industrial activity. In response to these findings, we suggest methods for mitigating and adapting to climate change along the corridor. Interpreting these findings, we argue that these assessments are critical for identifying potential environmental problems and ensuring that development initiatives are built with long-term sustainability in mind. Recommendations for mitigating climate change include international cooperation, increasing public awareness, and using resilient design principles. For future development projects, we include sustainable practices, community involvement and compliance with environmentally friendly standards as important elements in economic growth. We draw conclusions by emphasizing the need for future studies to track long-term impacts, evaluate socio-economic implications, and implement environmentally friendly strategies, maintaining a long-term balance between economic development and environmental conservation in CPEC and other international projects.

Innovative Approaches to Sustainable Civil and Structural Engineering: Integrating Resilient Design, Material Science, and Smart Technologies

Innovative Approaches to Sustainable Civil and Structural Engineering: Integrating Resilient Design, Material Science, and Smart Technologies

Analysis of the Impact of Climate Change on the Safety of Water Conservancy Facilities

This study analyzes the impact of climate change on the safety of water conservancy facilities, focusing on dams, levees, reservoirs, and water supply systems. Climate change induces increased flood risks, more frequent droughts, sea level rise, and extreme weather events, which challenge the integrity and functionality of these infrastructures. The research highlights the need for resilient designs, advanced technologies, and improved management practices to mitigate these impacts. By adopting flexible design standards, utilizing innovative materials, and enhancing emergency response plans, water conservancy facilities can better withstand climate-related stresses, ensuring water security and sustainability.

A Novel and Voltage Resilient Design of Ultra-High-Speed Low Power Keeper Based Full Adder

A Novel and Voltage Resilient Design of Ultra-High-Speed Low Power Keeper Based Full Adder

Assessment of a Force Method for the Resilient Seismic Design of Special Moment-Resisting Steel Frames with Hysteretic Energy Dissipation Devices

In this paper, the authors present the results of nonlinear dynamic analyses of twelve building models designed according to a methodology based upon the force method, capacity design principles and the concept of structural fuses to achieve resilient seismic designs for special moment-resisting steel frames with hysteretic energy dissipation devices mounted on chevron steel bracing. It is demonstrated that the resilient design mechanism previously checked with pushover analyses is also attained for most studied models with nonlinear dynamic analyses using an acceleration record which is compatible with the elastic design spectrum. Also, it is corroborated that the planned second line of inelastic defense is activated if the seismic action surpasses the considered design spectrum. Based upon the obtained results, it is confirmed that it is possible to perform a resilient seismic design for the studied system under the proposed methodology, even for tall and slender buildings. Therefore, the proposed initial stiffness ratio parameters and the global design parameters previously proposed by the authors to use in a code-oriented force method can be used with confidence for the resilient seismic design of this structural system.

Demand study of freight transportation via railway of four commodity groups: A case study on Costa Rica's Pacific Coast Route

Having railway mobility as an option among transportation modes is of prime importance for the freight logistics of a country and the overall performance of its commerce sector. This work presents a case study in Costa Rica, where freight transportation via railway was formerly available during the last century but has not been in full service since 1995. Specifically, this paper assesses the link connecting the capital city of San Jose to the port of Caldera on the Pacific Ocean coast, henceforth referred to as the “Pacific Coast Route”. Although government institutions and industries alike have stressed the importance of its reactivation in recent years, few efforts have been made to specifically study this route with a level of detail that enables them to understand the composition of freight markets.This study presents a novel demand estimation differentiated by four types of commodities developed to calculate the potential amount of goods that could flow through this corridor, measured in monetary terms and as volumes. Trends in the expected share were analyzed to identify variables that may improve the attractiveness of the railway service and the participation of clients along the route from the country's main economic activities which includes the following: agriculture & livestock, manufacturing, minerals, and forestry.The four-step transportation model was chosen for its suitability towards this case study; where available data sets were limited, the information was aggregated into yearly values, and the network was defined with few transportation zones. Activity-based models were not feasible in this case due to the lack of information on complete routes and volume flows. The model evaluated a first scenario given the present design of the route and a second scenario involving improvements in the alignment and the addition of a new segment.Regarding the opportunities of moving goods according to their type, in terms of volume, minerals (48 %) and agricultural (31 %) have the largest shares of participation in this region, followed by manufacturing (20 %) and forestry products (1 %). However, the manufacturing sector stands out in financial terms, accounting for 71 % of the total value of goods mobilized in the study area.It was found that the demand is most sensible for changes in the service fare, while the benefits of shorter travel times and a larger attraction area in scenario 2 were not significant. A service fee of $USD 2.35/ton in average is recommended to reach a 30 % modal shift towards the railway (following the European Commission's goals to reduce CO2 emissions from freight transportation in 2030).Finally, recommendations for public policies are provided to the entities in the country in the sectors of Agriculture, Health, Energy and Environment, Transportation, and Public Services. The suggestions aim to develop the new railway project with a holistic perspective, considering the inclusion of less profitable economic activities of the surrounding communities that require connectivity, compliance with environmental commitments, and design for resilience while aiming for a financially feasible business model.

Beyond SIRD models: a novel dynamic model for epidemics, relating infected with entries to health care units and application for identification and restraining policy.

Epidemic models of susceptibles, exposed, infected, recovered and deceased (SΕIRD) presume homogeneity, constant rates and fixed, bilinear structure. They produce short-range, single-peak responses, hardly attained under restrictive measures. Tuned via uncertain I,R,D data, they cannot faithfully represent long-range evolution. A robust epidemic model is presented that relates infected with the entry rate to health care units (HCUs) via population averages. Model uncertainty is circumvented by not presuming any specific model structure, or constant rates. The model is tuned via data of low uncertainty, by direct monitoring: (a) of entries to HCUs (accurately known, in contrast to delayed and non-reliable I,R,D data) and (b) of scaled model parameters, representing population averages. The model encompasses random propagation of infections, delayed, randomly distributed entries to HCUs and varying exodus of non-hospitalized, as disease severity subdues. It closely follows multi-pattern growth of epidemics with possible recurrency, viral strains and mutations, varying environmental conditions, immunity levels, control measures and efficacy thereof, including vaccination. The results enable real-time identification of infected and infection rate. They allow design of resilient, cost-effective policy in real time, targeting directly the key variable to be controlled (entries to HCUs) below current HCU capacity. As demonstrated in ex post case studies, the policy can lead to lower overall cost of epidemics, by balancing the trade-off between the social cost of infected and the economic contraction associated with social distancing and mobility restriction measures.

Influence of grading in compacted tailings behaviour: towards resilient design

The inherent variability of tailings is the main challenge in compacted filtered tailings stacks (CFTS) operation. Despite the advances in dewatering technologies, the filtration efficiency depends on the tailings’ gradation and mineralogy. A usual process is filtering materials separately, which can later be mixed and compacted. This paper studies two iron ore tailings (flotation and slime) from a unique mine and three mixtures (80/20, 70/30 and 60/40) produced from them to investigate the influence of grading on tailings’ compressibility, strength, stiffness, and state measures. The materials were thoroughly characterised and submitted to triaxial tests under low (50 kPa) and high (1,000 kPa) confinement levels and different moulding conditions (loose and dense). The results showed that the behaviour of the range of gradings investigated was similar in terms of compressibility, strength mobilisation (peak and M value), dilatancy and stiffness for similar compaction efforts. The packings produced seem to be affected mainly by the mineral composition and grading, while the mechanical procedures only change the magnitude of the state achieved, maintaining the proportion between them. Understanding how grading and mineralogy affect different geomechanical aspects of tailings is the first step towards resilient projects, which are essential to the mining industry’s future.

System-of-Systems Resilience Analysis and Design Using Bayesian and Dynamic Bayesian Networks

A System-of-Systems (SoS) is characterized both by independence and by inter-dependency. This inter-dependency, while allowing an SoS to achieve its objectives, also means that failures can cascade throughout the SoS. An SoS needs to be resilient to deal with the impact of complex internal and external environments. In this paper, we propose a resilience analysis method of an SoS based on a hierarchy structure. Firstly, we establish a hierarchy structure, which is ranked from high to low as capability level, activity level and system level. Then, Bayesian Networks (BNs) and Dynamic Bayesian Networks (DBNs) are used to analyze the resilience of the SoS. A resilience-based system importance metric is introduced, which is used in the budget allocation optimization problem during the development domain of an SoS. This paper proposes a mathematical programming model aimed at optimizing SoS resilience by optimally using budget to the subsystem. The application of the proposed approach is demonstrated using a case study: a Next Generation Air Transportation setting. The study results provide evidence that the proposed inter-dependency analysis based on Bayesian theory and the SoS resilience design approach can assist SoS system engineers in increasing expected SoS resilience during the development domain.

Conceptual shaking table tests for resilient segmental bridge columns with resettable sliding joints

The ever-increasing demand for accelerated construction of urban bridges or viaducts calls for more prefabrication with various joint schemes, while satisfying the need for seismic resilience. On the other hand, segmentation into components of various shapes and morphologies is common for multifunctional structures found in living organisms and ancient Chinese timber structures, which also inspires the development of resilient segmental bridge column design. To provide further insights into the cost-effective resilient design of precast bridge columns, this paper suggests the use of resettable sliding joints (RSJ) comprising lubricated gently-inclined joint interface with partially debonded tendon arrangement, essentially forming a hybrid sliding and rocking seismic isolation system of precast segmental structures. The deformability of the proposed design is high. Similitude analysis was conducted considering the rigid body behavior of individual segments under seismic input. It presents the conceptual shaking table testing of four 1:12 prestressed segmental column models fabricated with special three-dimensional (3D) printed plastic molds and interface treatment. A motion capture system was installed for accurate 3D displacement data acquisition and five typical major near-fault earthquake records were selected. Among all specimens, the RSJ segmental column could reach a high damping ratio of about 20 % during the tests, and it outperformed the others in many aspects: (i) a tolerable maximum top drift of about 1 %; (ii) a moderate percentage of transient rocking of about 20 %; (iii) an evenly distributed sliding displacement among all sliding joints; and (iv) negligible residual sliding drift at sliding joints. These superior attributes of RSJ segmental column are consistent under excitation of consecutive rounds of different major earthquake records, indicating high robustness as well as high seismic resilience in the design of RSJ segmental columns.