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Showing posts from October, 2022

Opportunities to Increase the Reliability of Existing Retaining Walls

  Abstract The problem of increasing the bearing capacity of foundations is always an urgent problem in modern geotechnical construction. With additional increased external loads on existing retaining structures, the use of traditional technologies to ensure their stability is not always justified. Often there is an urgent need to use non-standard methods of strengthening the bases. There are frequent cases of using existing retaining reinforced concrete structures for new additional loads from newly built objects. In such cases, the use of EDT bored piles allows solving complex geotechnical problems associated with the possible strengthening of overloaded foundations. Read More about this article: https://irispublishers.com/ctcse/fulltext/opportunities-to-increase-the-reliability-of-existing-retaining-walls.ID.000688.php Read More about Iris Publishers Google scholar Articles : https://scholar.google.com/citations?view_op=view_citation&hl=en&user=LoZ6uCQAAAAJ...

Circular Economy in the Building Sector: Experience from the URGE: Circular Building Cities Action Planning Network

  Abstract What is the contribution of circular economy in the effort to meet Paris agreement and slow down global warming? How circular is our planet, and which is the circularity gap in order to meet the Paris agreement? What is the role of cities in circular green transformation? This short communication communicates briefly finding of the URGE: Circular Building Cities Network that is financed by the URBACT programme, aiming to promote the role of cities in boosting circularity, specifically in the construction sector. Read More about this article: https://irispublishers.com/ctcse/fulltext/circular-economy-in-the-building-sector-experience-from-the-urge-circular-building-cities-action-planning-network.ID.000689.php Read More about Iris Publishers Google scholar Articles : https://scholar.google.com/citations?view_op=view_citation&hl=en&user=LoZ6uCQAAAAJ&cstart=20&pagesize=80&citation_for_view=LoZ6uCQAAAAJ:-_dYPAW6P2MC

Installation of Pit Fencing in Cramped Conditions

 Abstract  Construction of facilities in cramped conditions is always a complex geotechnical problem associated with ensuring the basal emergency operation of buildings and structures of the surrounding buildings. In the arsenal of geotechnicians, a great potential of geotechnical technologies for the installation of pit fences has been accumulated. Often, not everyone is suitable for the conditions of their use in cramped conditions. The most suitable technologies for such cases are the drilled wells used (wells for drill piles and soil anchors) with their subsequent filling with concrete and at the same time not disturbing the stress-strain state of the surrounding soil. The use of drilling piles and soil anchors arranged using electric discharge technology (ERT technology) in many cases successfully solves the problem of construction in cramped conditions. The article cites one of the geotechnical cases of fencing the pit in particularly cramped conditions. The work is an o...

High-Resolution Modelling of Carbon Dioxide Emissions Before and After the Implementation of a Designated Truck Lane

 Abstract  This work seeks to assess the impact of adding a lane for slower trucks on a divided multilane highway on CO2 emissions. A portion of the U.S. 101 highway in San Luis Obispo County in California consists of the Cuesta Grade which is a 2.75-mile segment with a 7% grade. A microsimulation software, VISSIM, was used in conjunction with the Environmental Protection Agency’s emissions model, MOVES, to estimate CO2 emissions on the corridor before and after the construction of the third lane. It was found that CO2 emissions decreased between 1998 (before) and 2012 (after the 2003 lane addition), but the effect of the truck lane was shown to be different for the northbound (uphill) and southbound (downhill) directions. The truck lane in the northbound direction exhibited a 9.5% decrease in volume with 10.7% decrease in emissions, and the southbound direction experienced a 20.3% increase in volume but 7.4% decrease in emissions. For the northbound (uphill) direction, emis...

A Systematic Review of Existing Methods plus the State-of-the-art Technologies Used to Collect Road-Related Data and its Usage

  Abstract Road networks are an essential component of infrastructure. In order to improve the performance of road networks, the existing (business as usual) data collection methods are critical for management staff. However, with the development of big data and technologies, advanced devices and analysis methods appeared in research area and industries. These technologies are more cost-efficient and intelligent to collect and analyze data. Therefore, there is a need to review the existing data collection methods and explore the state-of-the-art technologies regarding data gathering to figure out how best they can be used. This systematic review has been conducted to identify the technologies and data usage by answering two primary questions: 1) What is the evidence to support the use of existing data collection methods for the road sector? 2) What is the evidence to support the state-of-the-art technologies being used for road-related data collection and analysis? There is suffici...

Current Trends from Safety to Security Engineering

  Introduction Safety Engineering mitigates normal events. Its contemporary equivalence, for extreme disasters, demands the deployment of Statistics of Extremes, Gumbel [1]. Civil Engineering research has addressed extreme natural and industrial disasters by employing extreme statistical distributions of Gumbel and Weibull types, respectively. The author demonstrated that the Fr´echet distribution could model manmade extreme disasters. Their combined elects constitute the background of this novel endeavor. Interestingly, it has been mathematically established that only three kinds of extreme distributions (Gumbel, Fr´echet and Weibull (also called the Type-I, II and III, respectively)) are possible. Furthermore, from civil engineering application viewpoints, these distributions do not depend upon the parent distributions of events. Due to the overwhelming needs to mitigating extreme events, Security Engineering tools, both software and hardware, have increasingly becoming an active...

Decision Support Framework for Inspection and Maintenance; A Focus on Bridges using Post- Tensioning Tendons

  Abstract Aging and decay of transportation facilities, and the higher long-term cost of passive maintenance has led to the need for development of proactive management systems for bridge maintenance, repair and rehabilitation. This paper proposes a framework for Bridge Decision Support Framework (BDSF) as a form of proactive asset management system. A BDSF allows the asset manager to perform economic analyses on a bridge in order to establish priorities and make preliminary selection of preservation, repair or rehabilitation options. Among various bridge systems, segmental bridges using internal and external post-tensioning have faced great challenges due to issues related to the durability of the posttensioning tendons. Although some reserve capacity has been designed into these bridges, failure of tendons can have profound effect in the safety and structural integrity. These experiences have stressed the need for a proactive and predictive BDSF. A major component of such system...

Effects of Superstructure Components on CWR Track Buckling

  Abstract Track buckling is formation of large lateral misalignments mainly due to high compressive thermal stresses in continuous welded rail (CWR) tracks and often results in catastrophic derailments. Recognizing the actual behavior of this phenomenon requires complex interaction simulation of track components in vertical, lateral and torsional modes; however, most studies have restricted themselves to either vertical or horizontal planes, to make the analysis tractable. In the present study, the effects of track components including rails, sleepers, fastening systems and ballast materials on lateral stability of CWR tracks are determined, utilizing a developed 3D model. The validity of the model is verified through comparisons with CWERRI program results and other experimental works. Parametric studies have been conducted for both straight and curvilinear tracks. The results indicate that both parameters of ballast lateral resistance and type of rail have considerable influence...

TS3 – A New Technology for Efficient Timber Structures

  Abstract Until today, all known timber building systems allow only slabs with a uniaxial load bearing action. In the framework of a large research project a new timber slab system has been developed and already tested in first real applications. The developed slab system is designed for housing, commercial and industrial buildings. The slab system works as a flat slab carrying vertical loads biaxial and consists of timber slab elements like CLT glued together on site with a high performing butt-joint bonding technology. This technology was called Timber structures 3.0 (TS3). Several research and tests about the performance of the different slab elements and the butt-joint bonding have been performed. First structures have been built and proof the system. Read More about this article:  https://irispublishers.com/ctcse/fulltext/ts3-a-new-technology-for-efficient-timber-structures.ID.000592.php Read More about Iris Publishers Google scholar Articles :  https://scholar.go...