scholarly journals Integrated Cost-Analysis Approach for Seismic and Thermal Improvement of Masonry Building Façades

Buildings ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 143
Author(s):  
Linda Giresini ◽  
Simona Paone ◽  
Mauro Sassu
Keyword(s):  
Technical Solution ◽  
Masonry Building ◽  
Base Shear ◽  
Structural Element ◽  
Simplified Approach ◽  
Cost Curves ◽  
Building Facades ◽  
Thermal Improvement ◽  
Integrated Cost ◽  
Technical Solutions

The combination of structural and thermal efficiency is a new frontier in civil engineering. Indeed, the retrofitting strategies should optimize costs and technical solutions from these two points of view. If a technical solution is able to provide an improvement of both structural and energetic behavior, then the utility of the intervention can better justify the economic investment. In this paper, a meso-scale approach (i.e., façade-scale) for integrated interventions applied on masonry façades is proposed. The structural performance of the façade is evaluated by considering base shear and ductility of the structural element through non-linear static analyses. Moreover, the thermal indicator, that is the thermal transmittance, is computed with a simplified approach in terms of an equivalent wall, taking into account the role of the windows and doors of the façade. As proof of concept, the procedure is applied to a façade of an existing masonry building. Economic and environmental iso-cost curves are obtained to tune the interventions conceived for a real case study, analyzing the benefit offered by different retrofitting solutions.

scholarly journals Risk Assessment Framework to Avoid Serial Failure for New Technical Solutions Applied to the Construction of a CLT Structure Resilient to Climate

Buildings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 247
Author(s):  
Charlotte Svensson Tengberg ◽  
Carl-Eric Hagentoft
Keyword(s):  
Risk Assessment ◽  
Success Factors ◽  
Real Life ◽  
Qualitative Assessment ◽  
Technical Solution ◽  
Functional Requirements ◽  
Assessment Framework ◽  
Construction Period ◽  
Design Build ◽  
Technical Solutions

Design-build contractors are challenged with the task of minimizing failure risks when introducing new technical solutions or adapting technical solutions to new conditions, e.g., climate change. They seem to have a disproportional trust in suppliers and their reference cases and might not have adequate resources or methodologies for sufficient evaluation. This creates the potential for serial failures to spread in the construction industry. To mitigate this, it was suggested that a predefined risk assessment framework should be introduced with the aim of providing a prequalification and requirements for the use of the technical solution. The objectives of this paper are to develop a comprehensive risk assessment framework and to explore the framework’s potential to adequately support the design-build contractor’s decisions. The framework uses qualitative assessment, relying on expert workshops and quantitative assessments, with a focus on simulation and probabilities. Tollgates are used to communicate risk assessments to the contractor. The framework is applied to a real-life case study of construction with a CLT-structure for a Swedish design-build contractor, where exposure to precipitation during construction is a key issue. In conclusion, the chosen framework was successful in a design-build contractor context, structuring the process and identifying difficulties in achieving the functional requirements concerning moisture. Three success factors were: documentation and communication, expert involvement, and the use of tollgates. Recommendations to the design-build contractor on construction of CLT structure are to keep construction period short and to use full weather protection on site.

Support for Collaborative Building of a Railway Technical Solution during Tendering

2013 ◽  
Vol 4 (3) ◽  
pp. 103-113 ◽  
Author(s):  
Diana Penciuc ◽  
Marie-Hélène Abel ◽  
Didier Van Den Abeele
Keyword(s):  
Support Needs ◽  
Technical Solution ◽  
Complex Processes ◽  
Collaboration Support ◽  
Technical Solutions ◽  
Background Context ◽  
Division Of Work

As systems become more and more complex, more complex processes, organization and division of work are needed to achieve their conception and realization. The growing difficulty consists in the number and distribution of collaborators in disparate regions on the globe, the multifaceted communities that need to be coordinated in order to assure integration and coherence of their work. It is also the case of building railway technical solutions. The heterogeneity of customer market adds a supplementary challenge: adapt the solution to the customer background, context and real needs. In this context the authors propose a workspace to support collaboration when building customer technical solutions. The authors think that adequate collaboration support needs to be provided for each community and that a common backbone is needed between these communities to assure integration and coherence of their work. This paper gives a model and implementation of a dedicated workspace that can handle collaboration during complex processes like the construction of a railway technical solution.

Organizational Requirements and the Introduction of Information Technology in Courtrooms: A Case Study

1996 ◽  
Vol 11 (1) ◽  
pp. 71-77 ◽  
Author(s):  
David Poulson ◽  
Neil Waddell
Keyword(s):  
Information Technology ◽  
Systems Design ◽  
Technical Solution ◽  
Functional Requirements ◽  
Requirements Definition ◽  
It Systems ◽  
Equal Importance ◽  
Technical Solutions ◽  
Organizational Requirements

Traditional methods of systems design have tended to concentrate on capturing functional requirements and from them develop a system that will provide users with a technical solution to a problem they may have. However, there is a growing understanding, with historical origins in sociotechnical systems theory, that technical solutions alone, regardless of how well designed, may not succeed fully unless there is a concomitant understanding of the organization into which the technical solution is to be introduced. Organizational requirements, therefore, should become considerations of equal importance to systems designers. The ESPRIT Project ORDIT (organizational requirements definition for information technology) has developed a methodology which identifies and operationalizes organizational requirements for IT systems. This paper presents a case study in which the ORDIT concepts are applied to the process of introducing an IT system into a courtroom.

Rainwater propeller pumps structural integrity

2019 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Sergiu Valentin Galatanu ◽  
Sebastian Muntean ◽  
Liviu Marsavina ◽  
Iulian Ionut Ailinei ◽  
Dan Micota
Keyword(s):  
Shear Stress ◽  
Structural Integrity ◽  
Maximum Shear Stress ◽  
Operating Time ◽  
Operation Time ◽  
Technical Solution ◽  
Catastrophic Events ◽  
Impeller Blade ◽  
Content Type ◽  
Technical Solutions

Purpose The purpose of this paper is to focus on the structural integrity of the rainwater propeller pumps installed in the municipal wastewater treatment plant (WTP). Design/methodology/approach A numerical analysis is performed to determine the maximum shear stress on the fasten bolts. The rainwater propeller pump is examined in operation at normal conditions and when one blade is progressively blocked. Findings The failure mechanism of the rainwater pump impeller is determined. Research limitations/implications The fibbers and wastes are discharged together with rainwater during storms with these types of pumps to avoid the flood of the WTP. Several catastrophic events have occurred in service due to the fibbers clog the gap between the impeller blades and the pump casing. The clogging process is partially understood so actual technical solutions deal with effects rather the main causes. Practical implications The operation time of all seven rainwater pumps installed in Timisoara’s WTP is investigated. Climate changes in Banat region and new waste properties found in the wastewater require appropriate technical solutions. A technical solution is proposed based on these investigations to extend the operation time and to diminish the operation and maintenance costs. Social implications These large pumps are installed in the urban sewage centralised system implemented in the most cities. The access to the sewerage network is a requirement of any community, regardless of the social status. Originality/value The fracture surfaces of both fastening bolts of the rainwater pump impellers produced in service are examined. As a result, it has been identified that the catastrophic events are due to the brittle fracture of both fasten bolts between the impeller blades and the pump hub, respectively. The catastrophic events of the rainwater propeller pumps are directly correlated to the clog level of the impeller. The numerical simulation is performed to determine the maximum shear stress on the fasten bolts. The case with pump operating at normal conditions is performed identifying its vulnerabilities to clog conditions. Next, one impeller blade is progressively blocked considering three time stop scenarios associated with different clog levels. Conclusively, the operating time of the rainwater pump up to the catastrophic failure is correlated to the clog level of the impeller.

scholarly journals Technical Solution for a Real-Time Air Quality Monitoring System

2020 ◽  
Vol 15 (4) ◽  
Author(s):  
Attila Simo ◽  
Simona Dzitac ◽  
Flaviu Mihai Frigura-Iliasa ◽  
Sorin Musuroi ◽  
Petru Andea ◽  
...  
Keyword(s):  
Air Quality ◽  
Real Time ◽  
Monitoring System ◽  
Quality Monitoring ◽  
Real Field ◽  
Technical Solution ◽  
Air Quality Monitoring ◽  
Single Chip ◽  
Communication Module ◽  
Technical Solutions

This article will present a simple technical solution for a low-power and real-time air quality monitoring system. The whole package of software and hardware technical solutions applied for recording, transmitting and analyzing data is briefly described. This original monitoring system integrates a single chip microcon-troller, several dedicated air pollution surveillance sensors (for PM10, PM2.5, SO2, NO2, CO, O3, VOC, CO2), a LoRaWAN communication module and an online platform. This system was tested and applied under real field conditions. Depending on the measured values, it provides alerts, or, it can lead to the re-placement of specific components in the exhaust equipment. This article will pre-sent some experimental results, validated also by official measurements of government operated air quality stations.

scholarly journals Research on Decision Methods for Technical Solutions Based on Grey-correlation degree to Vapor Recovery of Refined Oil Terminals

2021 ◽  
Vol 252 ◽  
pp. 03054
Author(s):  
Yuanming Jia ◽  
Yiying Zhou ◽  
Hongmei Deng ◽  
Jing li
Keyword(s):  
Decision Model ◽  
Technical Solution ◽  
Refined Oil ◽  
Grey Correlation ◽  
Decision Method ◽  
Correlation Degree ◽  
Decision Methods ◽  
Grey Correlation Analysis ◽  
Grey Correlation Degree ◽  
Technical Solutions

In the process of decision on technical solution to vapor recovery of refined oil terminals, the grey-correlation analysis (GCA) is introduced to optimise technical solutions by building a multi-target decision model and using the sequencing of weighted grey-correlation degree (GCD) of evaluation solution as judgment criteria, to determine the priorities of solutions, and the effectiveness of the decision method is verified by a practical example.

scholarly journals DEVELOPMENT OF A TECHNICAL SOLUTION OF THE KNOTTING ROOT SCRIPALS OF A SWITCHING TRANSMISSION

2019 ◽  
pp. 87-96
Author(s):  
V. S. SYDORENKO ◽  
YE. M. FEDORENKO ◽  
O. V. HUBAR ◽  
M. A. ARBUZOV ◽  
V. S. ANDRIEIEV
Keyword(s):  
High Reliability ◽  
High Accuracy ◽  
Climatic Conditions ◽  
Operating Conditions ◽  
Technical Solution ◽  
Lateral Direction ◽  
Straight Line ◽  
Current Content ◽  
Improved Design ◽  
Technical Solutions

Purpose. The article proposes a technical solution to the design of the root-fastening assembly of turnouts, which corresponds to the operating conditions of the railways. Methodology. To achieve the stated goal, the authors analyzed the existing designs of root binding of turnouts and formulated proposals that should be used when developing new technical solutions for root binding. The designs of root bonds should provide simplicity of construction, have a few number of parts, be repairable; allow to use of special devices for the mechanization of installation and dismantling works, have a few cost, provide high reliability. It must also to provide high accuracy along the width of the path. Structures should be able to control the width of the path to the standard indicators in the lateral direction, and if necessary (in a straight line). The designs of root bonds should be adapted for all climatic conditions of Ukraine. Findings. Proposals have been used in the development and improvement of technical solutions for root bonding. A root binding was developed which was called the root binding of the insert-nodule type P and an improved root binding was developed, the improved design was called the root binding of the insert-nodular type SD. The developed technical solutions for the design of root bonds meet the requirements, and with the current content of the switch, they solve the problem of the need to adjust the width of the path in the knit root node. Originality. It has been established that the technical solution of root fastening of the insert-overlay type of CD has advantages over the technical solution of root fastening of the insert-overlay type P since it has the ability to move the root of the wit by changing the position of the regulating element to the field side, thereby facilitating the current maintenance of the path. Practical value. Proposals were developed for regulating the width of the path using the regulating element of the root fastening of the liner-overlay type of CD, the proposals took into account the requirements for different operating conditions, namely for the main, receiving and other routes taking into account the corresponding tolerances for them, the corresponding schemes of the control plates are given.

scholarly journals Risk Assessment of Joint Sealing Tape in Joints between Precast Concrete Sandwich Panels Resilient to Climate Change

Buildings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 343
Author(s):  
Charlotte Svensson Tengberg ◽  
Lars Olsson ◽  
Carl-Eric Hagentoft
Keyword(s):  
Climate Change ◽  
Risk Assessment ◽  
Precast Concrete ◽  
Technical Solution ◽  
Run Off ◽  
The Monte Carlo Method ◽  
Design Build ◽  
Precast Concrete Sandwich Panel ◽  
Moisture Conditions ◽  
Technical Solutions

Lately, a new technical solution, pre-compressed joint sealing tapes in precast concrete sandwich panel facades, has been introduced in Sweden. Although the consequences of performance failure can go far beyond the component, affecting the building, the introduction has gained little attention in terms of risk assessment in the literature and in industry. Instead, reference cases are used as verification without formal evaluation, potentially leading to serial failure. The aim of this paper was to provide guidance on how a design–build contractor should handle this new technical solution. A risk assessment framework using a design–build contractor’s perspective was applied to the case. The framework addresses new technical solutions or adaption to new conditions (e.g., climate change) with the aim of preventing serial failures. Moisture conditions within the joints were simulated using present and future climates, and probabilities of failure were assessed using the Monte Carlo method. The results of the study included identified risks of failure associated with the solution and factors influencing the probability of failure. A main issue was the exposure of the facade to driving rain but also run-off areas and imperfections in the application of the joint sealing tape. Future climate changes affect performance negatively. In conclusion, the new technical solution might be possible to use if draining potential is ensured in all detailed designs and a set of recommendations, including full-scale testing, is provided for the design–build contractor.

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