The Experts below are selected from a list of 198 Experts worldwide ranked by ideXlab platform

Claudio Modena - One of the best experts on this subject based on the ideXlab platform.

  • Out-of-plane shake-table tests of strengthened multi-leaf stone masonry walls
    Bulletin of Earthquake Engineering, 2017
    Co-Authors: Marta Giaretton, Maria Rosa Valluzzi, Nicola Mazzon, Claudio Modena
    Abstract:

    Existing unreinforced multi-leaf stone masonry (URM) buildings are one of the most earthquake prone types of Construction. Failure typically occurs even at low levels of earthquake-induced loads, with the out-of-plane delamination of masonry leaves and consequent collapse of the whole façade. Although this issue has been tackled by several researchers, dynamic tests reproducing the earthquake behaviour of as-built and strengthened multi-leaf stone URM walls are very limited in the literature. In response to this lack, shake-table testing of eight full-scale multi-leaf stone masonry walls followed by dynamic modal identification was performed. The application of steel tie-rods in the wall cross-section, the injection of the inner-core using hydraulic lime-based grout, and a combination of the two techniques are presented herein as suitable interventions to enhance the monolithic behaviour of multi-leaf stone URM walls. Tying the outer masonry leaves together increased the seismic capacity by a factor of 1.8 compared to unreinforced condition, while injecting grout into the inner-core of the wall provided resistance to peak ground acceleration (PGA) that were 2.3–3.6 times the PGA resisted by as-built walls, depending on the quality in the execution of the intervention. The results obtained in the walls strengthened with both techniques were significantly related to the grout injection only.

Marta Giaretton - One of the best experts on this subject based on the ideXlab platform.

  • Out-of-plane shake-table tests of strengthened multi-leaf stone masonry walls
    Bulletin of Earthquake Engineering, 2017
    Co-Authors: Marta Giaretton, Maria Rosa Valluzzi, Nicola Mazzon, Claudio Modena
    Abstract:

    Existing unreinforced multi-leaf stone masonry (URM) buildings are one of the most earthquake prone types of Construction. Failure typically occurs even at low levels of earthquake-induced loads, with the out-of-plane delamination of masonry leaves and consequent collapse of the whole façade. Although this issue has been tackled by several researchers, dynamic tests reproducing the earthquake behaviour of as-built and strengthened multi-leaf stone URM walls are very limited in the literature. In response to this lack, shake-table testing of eight full-scale multi-leaf stone masonry walls followed by dynamic modal identification was performed. The application of steel tie-rods in the wall cross-section, the injection of the inner-core using hydraulic lime-based grout, and a combination of the two techniques are presented herein as suitable interventions to enhance the monolithic behaviour of multi-leaf stone URM walls. Tying the outer masonry leaves together increased the seismic capacity by a factor of 1.8 compared to unreinforced condition, while injecting grout into the inner-core of the wall provided resistance to peak ground acceleration (PGA) that were 2.3–3.6 times the PGA resisted by as-built walls, depending on the quality in the execution of the intervention. The results obtained in the walls strengthened with both techniques were significantly related to the grout injection only.

Sungwoo Moon - One of the best experts on this subject based on the ideXlab platform.

  • Application of Mobile Devices in Remotely Monitoring Temporary Structures During Concrete Placement
    Procedia Engineering, 2017
    Co-Authors: Sungwoo Moon
    Abstract:

    Abstract During a Construction operation, concrete formwork is a temporary structure that contains concrete material in the shape of structural designs. Construction Failure often occurs during concrete placement due to the instability of support mechanisms. Therefore, this temporary structure should be constantly monitored during concrete placement to give an early warning of Construction Failure or instability. Because concrete placement is often executed in a natural area, the monitoring system can be more effective if mobile applications assist the safety manager in accessing sensor data from the sensors on the concrete formwork. This paper presents the schematic design and its prototype model to demonstrate the effectiveness of applying mobile devices in remotely monitoring concrete formwork during concrete placement. A combination of information and communication technologies are integrated to develop the mobile devices, such as mobile phones and smart glasses.

  • Application of USAN Technology for Monitoring Temporary Construction
    28th International Symposium on Automation and Robotics in Construction (ISARC 2011), 2011
    Co-Authors: Sungwoo Moon, Byungsoo Yang
    Abstract:

    Temporary structure is prone to Construction accident due to the dynamics in Construction. Any unexpected adversary effect can cause Construction Failure in temporary structures. Therefore, the structure should be continuously monitored to understand its behavior during Construction. The objective of this study is to test the feasibility of the ubiquitous sensor network (USN) technology in collecting Construction data during the Construction operation of temporary structures. This study presents the research result at the Construction System Integration Laboratory (CSIL) at the Pusan National University. In the study, various sensors were integrated into the USN to collect data of a temporary structure in a concrete operation. Using a monitoring system, the structure was monitored to find out whether any excessive structural behavior occurred. The data were used to provide a warning signal for evaluation as well as repair.

Ilías Ortega - One of the best experts on this subject based on the ideXlab platform.

  • Prevention of Construction Failures: A Systematic Approach
    Forensic Engineering 2015, 2015
    Co-Authors: Ilías Ortega
    Abstract:

    Even though each Construction Failure is to be regretted, each Failure provides information that may be used to prevent similar Failures. The systematic investigation of Construction Failures helps advance the science of Construction and building regulations. The results of such investigations identify errors to be avoided and contribute to increase the safety of future designs. Each Construction Failure points to a gap either in theory or practice and thereby fosters innovations. The present paper discusses several effective, mutually reinforcing methods to prevent Construction Failures. Among them are: macroscopic (i.e., statistical) analysis of large samples of Construction Failures, microscopic (i.e., case study) analysis of individual Construction Failures, collaborative design, design-Construction reviews, peer reviews, monitoring, and the transfer of safety management methods, such as incident reporting systems, from risk-conscious industrial sectors, e.g., aviation, to Construction.

  • Systematic Prevention of Construction Failures
    2000
    Co-Authors: Ilías Ortega
    Abstract:

    Each Construction Failure provides information that may be used to prevent similar Failures. Therefore, the systematic investigation of Construction Failures should be encouraged. These investigations identify errors to be avoided, and thus contribute to increase the safety of future designs. Each Construction Failure points to a gap either in theory or practice and thereby fosters innovations. Besides Construction Failure analysis, this report discusses other effective methods to prevent Construction Failures.

  • Systematic prevention of Construction Failures: An overview
    Technology Law and Insurance, 2000
    Co-Authors: Ilías Ortega
    Abstract:

    Each Construction Failure provides information that may be used to prevent similar Failures. Therefore, the systematic investigation of Construction Failures should be encouraged. These investigations identify errors to be avoided, and thus contribute to improvement in the safety of future designs. Each Construction Failure points to a gap either in theory or practice and thereby fosters innovations. As well as Construction Failure analysis, other effective methods for preventing Construction Failures are discussed.

  • Quality Improvement in the Construction Industry: Three Systematic Approaches
    Total Quality Management, 2000
    Co-Authors: Ilías Ortega, Søren Bisgaard
    Abstract:

    A major difference between Construction and manufacturing is that most constructed facilities are unique, while manufactured goods usually are massproduced. Therefore, to attain learning effects comparable to those achieved in mass-production, learning from Failures in Construction needs to take place at an industry-wide level. Further, methods of Quality Management adapted to the special circumstances of Construction need to be developed. In this report, we discuss three systematic approaches to prevent Construction Failures. First, we discuss the statistical analysis of large samples of Construction Failures (macroscopic analysis) to identify primary Failure modes and derive preventive measures. Next, we propose to select typical cases from the most frequently occurring Construction Failure modes. A detailed analysis (microscopic analysis) of the selected cases can then also lead to preventive measures. Finally, we review the transfer of safety management methods from risk-conscious industrial sectors, such as aviation, to Construction (methodological analysis).

Nicola Mazzon - One of the best experts on this subject based on the ideXlab platform.

  • Out-of-plane shake-table tests of strengthened multi-leaf stone masonry walls
    Bulletin of Earthquake Engineering, 2017
    Co-Authors: Marta Giaretton, Maria Rosa Valluzzi, Nicola Mazzon, Claudio Modena
    Abstract:

    Existing unreinforced multi-leaf stone masonry (URM) buildings are one of the most earthquake prone types of Construction. Failure typically occurs even at low levels of earthquake-induced loads, with the out-of-plane delamination of masonry leaves and consequent collapse of the whole façade. Although this issue has been tackled by several researchers, dynamic tests reproducing the earthquake behaviour of as-built and strengthened multi-leaf stone URM walls are very limited in the literature. In response to this lack, shake-table testing of eight full-scale multi-leaf stone masonry walls followed by dynamic modal identification was performed. The application of steel tie-rods in the wall cross-section, the injection of the inner-core using hydraulic lime-based grout, and a combination of the two techniques are presented herein as suitable interventions to enhance the monolithic behaviour of multi-leaf stone URM walls. Tying the outer masonry leaves together increased the seismic capacity by a factor of 1.8 compared to unreinforced condition, while injecting grout into the inner-core of the wall provided resistance to peak ground acceleration (PGA) that were 2.3–3.6 times the PGA resisted by as-built walls, depending on the quality in the execution of the intervention. The results obtained in the walls strengthened with both techniques were significantly related to the grout injection only.