cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.12755/isec.res.2019.71
title: ESTIMATION OF SHEAR-WAVE VELOCITY STRUCTURE USING MICROTREMOR MEASUREMENTS

description: Due to the recent construction boom in Ulaanbaatar city (UB), Mongolia, newly urban areas are rapidly expanded to the surrounded area of the city. According to the previous researches and reports, the thickness of the sedimentary basin in UB reaches 120m at the maximum in the area along the Tuul river. Therefore, the evaluation of site amplification is one of the essential parts of the estimation of earthquake hazard in this area. In this paper, the shear-wave velocity (Vs) structures in UB are estimated from single microtremor observations with the existing microtremor array observations. We carried out the microtremor observations at 50 sites and computed horizontal-to-vertical (H/V) spectral ratios. Inversion analysis is performed to the observed H/V spectral ratios based on the diffuse field approach (DFA) to determine the Vs structures. The site characterizations are evaluated from the amplification factors of the Vs structures.
DOI: 10.12755/isec.res.2019.72
title: EVALUATION OF THE DYNAMIC CHARACTERISTICS FOR SEISMIC DESIGN OF MULTI-STORY BUILDINGS

description: The fundamental period of vibration is a critical structural dynamic characteristic in seismic design. Several expressions for the calculation of the fundamental period have been recommended by different building codes and previous studies. However, further studies are still needed to evaluate the design expressions used for the calculation of the fundamental periods and assess the need for further refinement. In this study, comprehensive fundamental period data from two sources is collected and compared with different formulas from building codes and previous studies. The first data set is obtained from 147 instrumented buildings with various lateral force resisting systems (LFRSs). The second set of period data are collected from the dynamic response simulations of selected structures. Different LFRSs are considered, including steel moment resisting frames (SMRFs), reinforced concrete moment resisting frames (RCMRFs), reinforced concrete shear walls (RCSWs), concentrically braced frames (CBFs), eccentrically braced frames (EBFs), masonry structures and pre-cast structures. The correlations between the derived period expressions with those recommended by the design provisions show that the code approach is conservative enough for SMRFs, CBFs, masonry buildings and pre-cast structures. For RCMRFs, EBFs and RCSWs, the design code is slightly unconservative for low-rise buildings. The outcomes of the study help to arrive at more efficient and cost-effective seismic design of buildings with different characteristics.
DOI: 10.12755/isec.res.2019.73
title: EXPERIMENTAL AND NUMERICAL STUDIES OF STRUCTURAL PERFORMANCE OF NOTCH DAMAGED STEEL BEAMS

description: Performance of notch damaged unrepaired steel I-shaped beam specimens was examined experimentally and numerically simulated using finite element modeling. Nine U-shaped notch damaged specimens and one control beam specimen were considered. The nine unrepaired laterally unsupported I-shaped full-scale steel specimens were tested in two-point loadings and the parameters considered in the study were the size and location of the notch. The notch size was 30 mm, 40 mm, and 60 mm in depth with constant opening width of 20 mm. The location of the notch was at one-quarter, one third, and middle of the specimen clear span. All pre-damaged specimens had notches on one side of the tension flange with respect to the beam web except for two specimens where two notches were cut at the middle of the specimen clear span on both sides of the tension flange. The test specimens were modeled analytically using three-dimensional models of the bare-steel I-shaped specimens for comparison of the analytical predictions with experimental results. The test results showed the strength of the notched beams was hardly affected by the notch size or location. However, the stiffness of the beams was slightly decreased as the notch got closer to the mid-span with increased ductility. The corresponding analytical results were in good agreement with the test data.
DOI: 10.12755/isec.res.2019.74
title: EXPERIMENTAL ASSESSMENT OF TRC CYLINDRICAL TUBE-SHAPED

description: The purpose of this study is to investigate the behavior of tube-shaped TRC ductility experimentally via monotonic loading. Ar-Glass and PVA as textile materials are used in the production of composite tube parts. These parts were tested in 4 and 6 layers and in different thicknesses. As a result of the mortar thickness, textile layers play the major role in ductility and strength. As the tube thickness increases, the strength increases, but the ductility decreases. However, ductility increases as the tube thickness decreases and the energy absorption increase by making the parts more flexible. This paper analyzes how much ductile the 10 cm long tube can be under pressure and tensile forces. The use of different textile materials, different thicknesses, and different numbers of textile layers has been examined. According to the test results, it is concluded that cylindrical tube shaped units produced by using PVA fabric material is more ductile than units produced by using Ar-Glass fabric material. Also, with the wall or slab elements or pipeline obtained by using these units, the structure system can be strengthened against earthquake loads.
DOI: 10.12755/isec.res.2019.75
title: EXPERIMENTAL EVALUATION OF SOIL REINFORCEMENTS IN UNPAVED ROAD

description: In this study, a series of 24 laboratory tests were conducted on a footing resting on crushed stone with 17.68 kN/m3 dry unit weight overlying sandy soils of two relative densities corresponding to (60% and 80%). The subbase layer is of crushed stone with a thickness of 5, 7.5 and 10 cm. Ten tests were conducted under static load with and without geogrid. All the other 14 model tests were carried out under harmonic load which was applied in a sequence determined prior (40% of static load). Tests were conducted at (2) Hz frequency according to the loading value. The process of the loading was continued until the number of cycles reached 104 . The results indicated that, for static load and with the inclusion of the geogrid, as the thickness of the subbase layer increases, the percentage of increase in bearing capacity was reduced. In general, using geogrid reinforcement with subbase thickness of 7.5 and 5 cm causes an increase in bearing capacity approximately 1.5 to 2 times greater than for unreinforced respectively. This means that by using geogrid reinforcement, the thickness of subbase can be reduced which causes a reduction in construction cost.
DOI: 10.5281/zenodo.4892551
title: Classes of errors in DOI names: output dataset

description: This dataset contains a seven-column CSV file, where the first column ("Valid_citing_DOI") contains the DOI of a citing entity retrieved in Crossref, the second column ("Invalid_cited_DOI") contains the invalid DOI of a cited entity identified by looking at the field "reference" in the JSON document returned by querying the Crossref API with the citing DOI, and the third column ("Valid_DOI"), contains the corrected DOI if it has been identified, an empty string otherwhise. Finally, the last four columns ("Already_valid", "Prefix_error", "Suffix_error", "Other-type_error"), contain a 1 if the error in the DOI was related to that class, 0 otherwise. The citations to invalid DOIs have been retrieved from <em>Citations to invalid DOI-identified entities obtained from processing DOI-to-DOI citations to add in COCI</em> (Peroni, 2021), while the valid DOI names and the related classes of errors are the result of a process described in <em>Cleaning different types of DOI errors found in cited references on Crossref using automated methods</em>, by the same authors of this the dataset.
description: {"references": ["Peroni, Silvio. (2021). Citations to invalid DOI-identified entities obtained from processing DOI-to-DOI citations to add in COCI (Version 1.0) [Data set]. Zenodo. http://doi.org/10.5281/zenodo.4625300"]}
DOI: 10.5281/zenodo.4733646
title: Classes of errors in DOI names: output dataset

description: This dataset contains a seven-column CSV file, where the first column ("Valid_citing_DOI") contains the DOI of a citing entity retrieved in Crossref, the second column ("Invalid_cited_DOI") contains the invalid DOI of a cited entity identified by looking at the field "reference" in the JSON document returned by querying the Crossref API with the citing DOI, and the third column ("Valid_DOI"), contains the corrected DOI if it has been identified, an empty string otherwhise. Finally, the last four columns ("Already_valid", "Prefix_error", "Suffix_error", "Other-type_error"), contain a 1 if the error in the DOI was related to that class, 0 otherwise. The citations to invalid DOIs have been retrieved from <em>Citations to invalid DOI-identified entities obtained from processing DOI-to-DOI citations to add in COCI</em> (Peroni, 2021), while the valid DOI names and the related classes of errors are the result of a process described in <em>Cleaning different types of DOI errors found in cited references on Crossref using automated methods</em>, by the same authors of this the dataset.
description: {"references": ["Peroni, Silvio. (2021). Citations to invalid DOI-identified entities obtained from processing DOI-to-DOI citations to add in COCI (Version 1.0) [Data set]. Zenodo. http://doi.org/10.5281/zenodo.4625300"]}
DOI: 10.12755/isec.res.2019.76
title: EXPERIMENTAL INVESTIGATION ON SELF CURING RECYCLED AGGREGATE CONCRETE MEMBERS

description: Self-curing concrete is an important aspect in strength development, which is neglected due to various reasons such as shortage of water, inaccessibility of structures during curing. Self-curing agents play important role in heat of hydration and strength development. The present study involves the use of self-curing agent polyethylene glycol (PEG 6000). In this investigation, M20 to M50 grade concrete has been considered to evaluate strength characteristics and flexural behavior using natural and recycled aggregate concrete. The various percentages of PEG 6000 have been used. The test result indicates self-curing concrete has indicated strength enhancement compared to conventional curing concrete. The strength for normal coarse aggregate concrete with a self-curing agent (PEG 6000) at 2% with 10% GGBS is decreased when compared with recycled coarse aggregate concrete with 1% (PEG 6000) with addition 10% GGBS. Mechanical properties are 7% to 20% higher for self-curing concrete when compared to natural concrete. Similarly, the flexural strength of normal coarse aggregate concrete was found to be varying from 4% to 16% more than with recycled coarse aggregate concrete at 28 days. Ultimate deflection of RC beams is 10% greater than the NC beams and ultimate moments of RC beams were 1% to 3% less than the corresponding NC beams. The moment-curvature relationship and loaddeflection characteristics of the NC beams and RC beams show a similar trend.
DOI: 10.12755/isec.res.2019.77
title: EXPERIMENTAL STUDY ON CONTINUOUS BEAM TYPE SQUARE CFST BEAM-TO-COLUMN CONNECTION

description: Concrete-filled steel tubular (CFST) columns are used widely as building structure components because of their good performance. It can be complex, however, to connect beams into CFST columns, especially when rigid beam-to-column connections are required. In order to simplify the fabrication requirements and cost of these connections, a continuous beam type connection through the column is proposed. This can develop the full plastic moment capacity of the beam. In this paper, the experiment testing results of two types of CFST beam-to-column connection specimens are presented and the connection performance and load transfer mechanisms are examined. The continuous beam type connection performance is compared to that of traditionally used through-diaphragm type of connection, which is more complex and demanding to fabricate. Both specimens showed good seismic performance, exhibiting stable hysteretic behavior with high energy absorption. The maximum experimental strength exceeded the calculated value. For a continuous beam type specimen, there is the potential for the column flange to be affected by the local deformation from the steel beam under bending induced beam tension. However, such effects were not observed in practice until late in the test after extensive beam plastic action had occurred.
DOI: 10.12755/isec.res.2019.78
title: EXPLORING APPLICATIONS OF BLOCKCHAIN TECHNOLOGY IN THE CONSTRUCTION INDUSTRY

description: Blockchain provides a secure decentralized information management system that can solve many common problems facing the construction industry. The loose structure of the construction industry, the way that public and private projects are tendered, and the supply chain system it uses for material and service delivery provide unique challenges and problems. New information technology management systems such as BIM and RFID are used to address some of these issues, though not completely. Blockchain technology can be used to further improve the information management systems in construction, provide more automation and mitigate many possible legal conflicts by default. Implementation of blockchain technology in the construction industry can also result in the use of smart contracts with fewer administrative struggles, improve the flow of the project, material, and service delivery, and increase the security and currentness of BIM or project documents. This study aims to explore the applications of blockchain technology in improving the construction industry's information management systems. It is concluded that not only the blockchain technology has potential in addressing some of the common problems in the construction industry but also it is adaptable to the construction industry structure and the way it is practiced. Thus, blockchain technology is a viable option for adaptation in the construction industry.
DOI: 10.12755/isec.res.2019.79
title: FINITE STRAIN MEASUREMENT USING IMAGE ANALYSIS UNDER REVERSE SHEAR AFTER FORWARD SHEAR

description: The purpose of this research is to investigate the progress of local deformation under finite deformation by using image analysis based on the Natural Strain theory. Since Natural Strain used in the image analysis can satisfy the addition law of strain on an identical line element and can remove the rigid body rotation from shearing strain component, it is an effective strain for representing stress and strain behavior under large deformation. Therefore, in this research, these features of Natural Strain theory will be incorporated into the method of image analysis. In the present study, using the test pieces made of high purity tough pitch copper, the local deformation occurring under large simple shear is investigated by comparing the strains in each element from the upper position to the middle position with the average strain in the gauge length. In order to investigate the progress of local deformation caused by differences of strain hardening in the material, the experiments are conducted under different deformation histories which are given by applying reverse shear after applying forward shear with different sizes. Consequently, it is revealed that if the value of plastic strain obtained by integrating over the whole deformation path is almost the same, the progress of local deformation is approximately the same even if the deformation path is different.
DOI: 10.12755/isec.res.2019.80
title: FLEXURAL BEHAVIOR OF HIGH STRENGTH GEO-POLYMER CONCRETE BEAMS

description: The demand for concrete is increasing day by day. As the consumption of cement is increased, environmental issues arise due to the release of CO2 during the manufacturing of cement. The objective of this research work is to produce a pollution free concrete with a combination of fly ash and GGBS (Ground granulated blast furnace slag) and without the use of cement. In this paper an attempt was made to study the mechanical properties of high strength geo-polymer concrete of grade M60 using GGBS, fly ash and micro silica. The testing program was planned for the mechanical properties of geo-polymer concrete and flexural behavior of corresponding beams. The experimental results indicated that the geo-polymer concrete M60 grade has a compressive strength of 70.45 MPa at the age of 28 days cured at ambient condition. Further, flexural strength and split tensile strengths for M60 grade high strength geo-polymer concrete at 28 days were observed to be 5.45 MPa and 3.63 MPa respectively. The modulus of elasticity was higher than the theoretical value proposed by IS 456-2000. It was also observed that the load carrying capacity of M60 grade high strength geo-polymer concrete found to be more than corresponding grade conventional concrete. The load-deflection, moment-curvature relationships were studied. The experimental results were encouraging to continue for further research in the area high strength geo-polymer concrete.
DOI: 10.12755/isec.res.2019.81
title: FLEXURAL DUCTILITY OF STRUCTURAL CONCRETE MEMBERS SUBJECTED TO LIMITED CYCLES OF REPEATED LOADING

description: For structural concrete members that may expose to serious earthquake, overload or accident impact, the design of ductility must be given the same importance as the flexural strength. The aim of this investigation is to study the change in ductility of structural concrete flexural members during their exposure to limited cycles of repeated loading. Twenty full-scale beam specimens have been fabricated in to two identical groups
description: each group consisted of ten specimens. The first group was tested under monotonic static loading to failure and regarded as control beams, while the specimens of the second group were subjected to ten cycles of repeated loading with constant load interval, which ranged between 40% and 60% of ultimate load. Specimens in each group were categorized as follows: two traditional reinforced concrete specimens with different intensity of tension reinforcement
description: three partially prestressed specimens with bonded strands
description: three partially prestressed specimens with unbonded strands
description: and two fully prestressed concrete specimens. The main variable, which was considered for all specimens was the partial prestressing ratio (PPR). It was observed that, the ductility of reinforced concrete beams was insignificantly increased during subjecting to limited repeated loading. For fully prestressed and partially prestressed concrete beams with high level of PPR, the ductility was significantly enhanced, while, it was decreased for specimens with small level of PPR.
DOI: 10.25318/3310034001-eng
title: Plans to transfer, sell, or close business in the next 12 months, by business characteristics, second quarter of 2021

description: Plans for the business to transfer, sell, or close in the next 12 months, by North American Industry Classification System (NAICS), business employment size, type of business, business activity and majority ownership, second quarter of 2021.
DOI: 10.12755/isec.res.2019.82
title: FRP-FLEXURAL STRENGTHENING OF STEEL BEAMS: A FINITE ELEMENT ANALYSIS STUDY

description: Fiber reinforced polymer (FRP) strengthening has been widely used for concrete structures. However, limited studies have been conducted on its application to steel structures. The use of FRP materials to retrofit steel members is an effective replacement for welded or bolted steel plates and offer high strength-to-weight ratio, resilience to environmental degradation, and a robust fatigue performance. Past studies have shown that the application of FRP to steel is a promising technical solution to help against corrosion and also to increase the load carrying capacity of steel members. In the present study, finite element analysis (FEA) model of a steel beam strengthened with carbon fiber reinforced polymer (CFRP) laminates was developed using ANSYS Mechanical finite element software program. The model was validated by comparing the FEA and experimental results of an existing study in the literature and they were in good agreement. A parametric study was conducted on the validated steel beam model with the aim to investigate the effects of basalt fiber reinforced polymer (BFRP) and two types of adhesives on its performance under static loading. The FRP laminates provided an increase in flexural capacity and pseudo ductility of the beams. The optimum bond length was found to be 2/5 of the span length for the beam in this study.
DOI: 10.12755/isec.res.2019.83
title: GOVERNMENT ROLES IN PUBLIC-PRIVATE PARTNERSHIPS PROCUREMENT OF INFRASTRUCTURES: THEORETICAL APPROACH

description: Social and economic infrastructures provision has been the sole responsibility of the government in the time past. However, due to the geometric demand in human infrastructures needs, the government supply capacity has been constrained. The inability of the government to close the infrastructural gaps is due to the inequality in financial capacity and the financial worth of social and economic infrastructures. Despite the paucity of the fund required for infrastructures provisions in government, the need for social and economic infrastructures cannot wait due to its relevance in nation-building. The innovative approach to meeting the social and economic infrastructures is engineered through the adoption of a Public-Private Partnership (PPP) procurement option. The procurement option is a sure route through which infrastructural provision can be sustained. This paper reviews literature on PublicPrivate Partnership by buttressing on the expected roles of the government through the Governance theory concept.
DOI: 10.12755/isec.res.2019.84
title: GREEN ROOFS TO IMPROVE THE ENERGY RENOVATION RESILIENCE OF HISTORIC BUILDINGS

description: The introduction of vegetation in urban areas, through both green roofs and green walls, is a sustainable strategy for improving the environment and the quality of life, as well as crucial for urban biodiversity since the moment it is able to create new habitats for plant and animal species. The design and realization of green roof systems abroad is promoted and stimulated while in Italy, this subject, is still an innovation not supported by many real implementations. The application of this technological green system has a great importance for the redevelopment of existing building heritage, especially for historic buildings, to improve their energy-performance qualities, with respect for their architectural value. The aim of this study is to identify the technical issues for the realization of green roofs in urbanized contexts by focusing on the implementation of a green roof on a building of Leghorn following intervention guidelines developed. This research shows that not only does this system allow higher energy saving, but it also brings a decrease of load bearing on the structure.