cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.14455/isec.res.2019.66
title: EFFECTS OF AN ENZYME ON THE PERFORMANCE OF SUBGRADES

description: An efficient transportation system requires a good network of roads provided with pavements that can withstand both the heavy and frequent traffic demands and environment variations while requiring minimal maintenance. However, roads are sometimes built where the sub-grade soil does not comply with the specifications and needs to be replaced with an acceptable soil that satisfies these requirements. To minimize the construction cost and the impact on the environment that the road construction would have, stabilizing agents (lime, cement or fly ash), are commonly used to improve the characteristics of in-situ soils. However, this process adds to the cost of road construction and maintenance. Therefore, alternative, environmentalfriendly solutions have been investigated to reduce these costs. In recent years, enzymes have been used successfully to stabilize mostly fine-grained soils. This paper reports on an on-going research program on the use of various stabilizing agents to improve the properties of in-situ sub-grades for rural roads. Two locally-sourced soils were used in this investigation. The effects of cement, cement-fly ash mix and Permazyme binders on the properties of the selected soils were investigated. A series of tests was performed to establish the strength, stress-strain and deformation characteristics of the supplied soils. The results were compared to establish if Perma-zyme is suitable as stabilizing agent for the supplied soils.
DOI: 10.14455/isec.res.2019.67
title: EFFECTS OF BAMBOO FIBERS AND LIMESTONE POWDER ON FRESH PROPERTIES OF SELF-COMPACTING CONCRETE

description: Self-compacting concrete (SCC) flows through densely steel reinforced elements and consolidates under self-weight without need for vibration or compaction. This helps in complex and densely reinforced structures. The integration of fibers and fillers in concrete improves its general properties. The addition of fibers in particular can regulate the flow and workability of the concrete
description: hence, the high workable nature of SCC can be an ideal mix for the incorporation of fibers. This research investigates the effect of bamboo fibers and limestone powder on the fresh properties of selfcompacting concrete. Bamboo fibers of an aspect ratio of 50 and varied volumes of 0.25%, 0.5%, 0.75% and 1% were adopted for this research. The workability of the mix was assessed by slump flow test and V- funnel test. For fiber volumes of 0.25%, 0.5%, 0.75%, it was observed that the coarse aggregate was evenly distributed across the spread, indicating good viscosity and stability of the mix. The presence of 10% percent limestone powder improved the workability of the concrete mix. This can be attributed to filler properties of limestone powder, which, affecting the cement particle system, changed the ordinary distance between them and modified the water quantity available for the hydration process. These results proved that the bamboo fiber and limestone powder can be sustainably adopted to regulate the flow-ability of SCC without compromising desired properties.
DOI: 10.5281/zenodo.2601984
title: Binary black-hole simulation SXS:BBH:1687

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2601985
title: Binary black-hole simulation SXS:BBH:1687

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2601993
title: Binary black-hole simulation SXS:BBH:1689

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2603374
title: Binary black-hole simulation SXS:BBH:1686

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2603375
title: Binary black-hole simulation SXS:BBH:1686

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2603856
title: Binary black-hole simulation SXS:BBH:1688

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2603857
title: Binary black-hole simulation SXS:BBH:1688

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2621466
title: Binary black-hole simulation SXS:BBH:0115

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2622242
title: Binary black-hole simulation SXS:BBH:0202

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2622251
title: Binary black-hole simulation SXS:BBH:0208

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.14455/isec.res.2019.68
title: EFFECTS OF DIFFERENT SOURCES OF WATER ON THE PROPERTIES OF CONCRETE

description: Water is vital to human existence and life can only be sustained by it. Concrete is a widely used construction material and water is an important part of its composition. Potable water is what is recommended for concrete works, but unfortunately, some places do not have access to this. Places that do not have access to potable water might have access to other water sources that might be used for concrete works. This study was undertaken to investigate the effects of water from different sources on concrete mechanical properties. This study evaluates the characteristics of concrete produced with river water, well water, and potable tap water. Compressive strength and Density, were used to evaluate the characteristics of concrete specimens of mix ratios 1:2:4 and 1:11 /2:3 produced with water from the different sources. The results showed that concrete specimens produced with tap water had the highest mean compressive strength at 28 days. While well water had the lowest compressive strength, it was concluded that well water was not suitable for concrete works even though it is already being used on some sites that can't access tap water.
DOI: 10.14455/isec.res.2019.69
title: EFFECTS OF HUMAN-STRUCTURE INTERACTIONS ON THE DYNAMIC PROPERTIES OF BUILDING FLOORS SUSCEPTIBLE TO VIBRATIONS

description: Excessive vibrations of building floors due to human movements have become an important vibration serviceability problem for building designers and owners. A series of vibration tests on a full-scale laboratory floor with different numbers of humans in various postures were conducted. Using this data, the dynamic properties of a twodegree-of-freedom (2-DOF) dynamic system representing groups of people in different postures were computed. A 3-DOF model representing the floor and humans was developed and its dynamic properties were defined in terms of non-dimensional parameters. The dynamic properties of the floor were measured when occupied by groups of people in different postures and compared to those predicted using the 3- DOF dynamic model considering the identified human models. The results showed that the predicted properties were within the range of those found from the measurements, which validated the identified human dynamic models. This study also showed how the presence of humans can affect the natural frequency and damping ratio of a floor system.
DOI: 10.14455/isec.res.2019.70
title: ESTIMATING THE RUNNING COSTS OF COMMERCIAL BUILDINGS: ARTIFICIAL NEURAL NETWORK MODELING

description: Running costs of a building is a substantial share of its total life-cycle cost (LCC) and it ranges between 70-80% in commercial buildings. Despite its significant contribution to LCC, investors and construction industry practitioners tend to mostly rely on construction cost exclusively. Though the early stage estimation of running costs is limited due to the unavailability of historical cost data, several efforts have been taken to estimate the running costs of buildings using different cost estimation techniques. However, the prediction accuracy of those models is still challenged due to less quality and amount of data employed. This study, therefore, developed an artificial neural network (ANN) model for running costs estimation of commercial buildings with the use of building design variables. The study was quantitively approached and running costs data together with 13 building design variables were collected from 35 commercial buildings. The ANN model developed resulted in a 96.6% perfect correlation between the running cost and building design variables. The testing and validation of the model developed indicate that there is greater prediction accuracy. These findings will enable industry practitioners to make informed cost decisions on implications of running costs in commercial buildings at its early stages, eliminating excessive costs to be incurred during the operational phase.
DOI: 10.14455/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: 10.14455/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: 10.14455/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: 10.14455/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: 10.5281/zenodo.2601968
title: Binary black-hole simulation SXS:BBH:1682

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2601969
title: Binary black-hole simulation SXS:BBH:1682

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2601974
title: Binary black-hole simulation SXS:BBH:1683

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2601975
title: Binary black-hole simulation SXS:BBH:1683

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2601980
title: Binary black-hole simulation SXS:BBH:1685

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2601981
title: Binary black-hole simulation SXS:BBH:1685

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2603518
title: Binary black-hole simulation SXS:BBH:1684

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2603519
title: Binary black-hole simulation SXS:BBH:1684

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2603831
title: Binary black-hole simulation SXS:BBH:1681

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2603832
title: Binary black-hole simulation SXS:BBH:1681

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2603843
title: Binary black-hole simulation SXS:BBH:1680

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2621465
title: Binary black-hole simulation SXS:BBH:0166

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2622243
title: Binary black-hole simulation SXS:BBH:0203

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2622244
title: Binary black-hole simulation SXS:BBH:0204

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2622245
title: Binary black-hole simulation SXS:BBH:0205

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2622247
title: Binary black-hole simulation SXS:BBH:0206

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.5281/zenodo.2622248
title: Binary black-hole simulation SXS:BBH:0207

description: Simulation of a black-hole binary system evolved by the SpEC code.
DOI: 10.14455/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: 10.14455/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: 10.14455/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: 10.14455/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.