Revista de la Construccion最新文献_第9页

Enhanced quadratic approximation integrated with butterfly optimization: a new search algorithm tested on structural and mathematical problems 结合蝴蝶优化的增强二次逼近:在结构和数学问题上测试的一种新的搜索算法

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2021-08-01 DOI: 10.7764/rdlc.20.2.215

A. Mortazavi, S. Seker

{"title":"Enhanced quadratic approximation integrated with butterfly optimization: a new search algorithm tested on structural and mathematical problems","authors":"A. Mortazavi, S. Seker","doi":"10.7764/rdlc.20.2.215","DOIUrl":"https://doi.org/10.7764/rdlc.20.2.215","url":null,"abstract":"The Butterfly Optimization Algorithm (BOA) is a swarm based technique, inspired from mating and food searching process of butterflies, developed in last year. Experiments indicate that BOA provides substantial exploration capability on conventional non-constrained benchmark problems, however for the cases with more complex and noisy domains the algorithm can easily be trapped into local minima due to its restricted exploitation behavior. To tackle this issue, current study deals with introducing an alternative search strategy to explore the region of the search domain with high certainty. Such that, firstly a weighted agent is defined and then a quadratic search is performed in the vicinity of this pre-defined agent. This alternative search strategy is named as Enhanced Quadratic Approximation (EQA) and it is combined with BOA method to improve its exploitation behavior and provide an efficient search algorithm. Thus, obtained new method is named as Enhanced Quadratic Approximation Integrated with Butterfly Optimization (EQB) algorithm. Different properties of proposed EQB are tested on mathematical and structural benchmark problems. Acquired results show that the introduced algorithm, in comparison with its parent method and some other well-stablished reported algorithms in the literature, provides a competitive performance in terms of stability, accuracy and convergence rate.","PeriodicalId":54473,"journal":{"name":"Revista de la Construccion","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43307790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical properties of roller compacted concrete containing recycled concrete aggregate 含再生混凝土骨料碾压混凝土的力学性能

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2021-08-01 DOI: 10.7764/rdlc.20.2.277

Hojjat Hosseinnezhad, Daniel Hatungimana, Ş. Yazici

引用次数: 6

Construction machinery hire rates deviation in Malaysia: an inflation rate effect analysis 马来西亚工程机械租用率偏差:通货膨胀率影响分析

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2021-04-21 DOI: 10.7764/RDLC.20.1.91

M. A. Musarat, W. Alaloul, M. S. Liew

引用次数: 1

Numerical investigation of the effect of beam slab openings in RC structures on seismic behavior 梁板开孔对钢筋混凝土结构抗震性能影响的数值研究

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2021-01-01 DOI: 10.7764/rdlc.20.3.512

Ahmet Özbayrak, F. Altun

引用次数: 0

Assessment of shear wave velocity concept on the site specific analysis and its effects over performances of building codes 评价横波速度概念对现场具体分析及其对建筑规范性能的影响

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2021-01-01 DOI: 10.7764/rdlc.20.3.527

E. Güler, Kamil Bekir Afacan

{"title":"Assessment of shear wave velocity concept on the site specific analysis and its effects over performances of building codes","authors":"E. Güler, Kamil Bekir Afacan","doi":"10.7764/rdlc.20.3.527","DOIUrl":"https://doi.org/10.7764/rdlc.20.3.527","url":null,"abstract":"Earthquakes’ effects on the ground especially to superstructures vary depending on the local site conditions. As the seismic waves move towards the surface, the dynamic behavior is affected by the depth of the bedrock, layer thickness, and the soil type. Site specific soil behavior analyses are carried out to estimate the seismic force spread from the bedrock to the ground along the soil layers and to determine the spectral properties of the site. During the transmission of the wavelength, the amplitude and frequency content change depending on the properties of the soil layers. Both the alteration of the dynamic properties of soil layers and the earthquake characteristics must be analyzed in order to predict the ground surface behavior. Turkey is one of the most important earthquake prone country in Europe and it is crucial to reduce any possible damage as a result of seismicity by taking the necessary measures. This study focuses on a region near North Anatolian Fault which is one of seismically active faults in Yalova region in Turkey. The goal is to understand the nonlinear site specific behavior along with the equivalent linear option using two boring data with similar shear wave velocity and site class. Eleven different earthquakes were chosen for the analysis. The fault type and the soil class are the main characteristics to determine those records. The spectral behaviors of the ground surface were obtained from different models and they were compared with three different building codes (the new Turkish Building Code (TBC 2018), the Eurocode8 (EC8) and the International Building Code (IBC)). Analysis show that 1) the performance of the building codes vary a lot to predict the surface behavior, 2) equivalent and nonlinear site response differ in terms of short and long period spectral behavior and 3) the determination of site classes from shear wave velocity solely may not be sufficient to understand the propagation of the wave and sandy or clayey behavior should also be considered in design purposes.","PeriodicalId":54473,"journal":{"name":"Revista de la Construccion","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71304534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The deformation characteristics of buried HDPE transfer lines in trenches under the effect of temperature 温度作用下沟槽埋地HDPE传输线的变形特性

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2021-01-01 DOI: 10.7764/rdlc.20.3.452

Necmettin Polat, C. Erenson, Niyazi Uğur Terzi

{"title":"The deformation characteristics of buried HDPE transfer lines in trenches under the effect of temperature","authors":"Necmettin Polat, C. Erenson, Niyazi Uğur Terzi","doi":"10.7764/rdlc.20.3.452","DOIUrl":"https://doi.org/10.7764/rdlc.20.3.452","url":null,"abstract":"Today, the use of high-density polyethylene (HDPE) transfer lines is increasing day by day for drinking water, wastewater, sewerage networks, rainwater drainage lines, water transport structures, and natural energy sources, etc. In this study, flexible HDPE pipes were embedded in a trench to expose them to variable relative density and different thermal conditions so that the resulting deformation behavior could be investigated. Displacements and elastic strain values in the crown and spring line regions were measured. The main aim of this research was to determine the behavior of HDPE pipes under temperature effects within the framework of geotechnical principles to reflect real field conditions. As a result, pipes subject to vertical loading were tested under different relative density and thermal conditions. In the experiments carried out in a silica sandy trench, the deformations increased due to an increase in relative density. The maximum displacements and bending moment values were obtained at 50°C, which was the maximum thermal condition applied. An increase in temperature increased the deformation values due to the resulting decrease in the modulus of elasticity.","PeriodicalId":54473,"journal":{"name":"Revista de la Construccion","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71304312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Self-compacting mortars with mineral additions: perlite and limestone filler 含矿物添加剂的自密实砂浆:珍珠岩和石灰石填料

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2021-01-01 DOI: 10.7764/rdlc.20.3.479

Verónica Fernanda Artigas, M. Positieri, Marı´a Virginia Quintana, Ángel Oshiro, Franco Rodrigo Cortez

{"title":"Self-compacting mortars with mineral additions: perlite and limestone filler","authors":"Verónica Fernanda Artigas, M. Positieri, Marı´a Virginia Quintana, Ángel Oshiro, Franco Rodrigo Cortez","doi":"10.7764/rdlc.20.3.479","DOIUrl":"https://doi.org/10.7764/rdlc.20.3.479","url":null,"abstract":"With the increasing infrastructure and the need for eco-sustainable alternatives, the concrete industry has motivated to look for supplementary cementitious materials especially those generated from waste. The advantages of self-compacting concrete (SCC) make it useful in the worldwide; therefore, it is essential to study additions that can be incorporated into it, to improve its properties. Limestone powder (LP) and local waste perlite fines (PF) from Salta (Argentina) are proposed as mineral addition in self-compacting mortars (SCM). PF has a high content of SiO2 and Al2O3 which can contribute to increasing the strength of the concrete due to the pozzolanic reaction. Physicochemical characterization of this waste is studied and the behavior of SCM mixtures with different proportions of LP and PF are also analyzed. Sets of specimens have been performed in order to test their rheological characteristics in the fresh state and their mechanical resistance in the hardened state. The results indicate that the combination of LP and PF has a beneficial influence on the fresh state, granting an adequate fluidity and viscosity of the mixture; on the hardened state, compressive strengths similar to the standard are achieved at 90 days in mortars with up to 20% cement replacement by additions.","PeriodicalId":54473,"journal":{"name":"Revista de la Construccion","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71304358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Self-heating mortars with using graphene oxide and increasing CSH gel formation with the direct current application 使用氧化石墨烯的自热砂浆，随着直流电的应用增加了CSH凝胶的形成

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2021-01-01 DOI: 10.7764/rdlc.20.3.559

İsmail Hocaoğlu

{"title":"Self-heating mortars with using graphene oxide and increasing CSH gel formation with the direct current application","authors":"İsmail Hocaoğlu","doi":"10.7764/rdlc.20.3.559","DOIUrl":"https://doi.org/10.7764/rdlc.20.3.559","url":null,"abstract":"Graphene oxide (GO) is that the product of the exfoliation of graphite by chemical processes. GO has a potential candidate to be used as a nano reinforcement material in cement-based systems due to its water dispensability, quite good mechanical properties, and high aspect ratios. In this research, the effects of different water/binder (water/cement) ratio (0.55, 0.70, 0.90, and 1.00) and graphene oxide on mortars to which applied DC stress intensity have been investigated. In experiments, 4cm x 4cm x 16cm wood molds (electrical isolated) have been used. Immediately after mixing into the mixtures, a stress intensity of 25 V was applied for 24 hours with a DC power source. Experiments were conducted in the laboratory conditions. Effect on hydration internal temperatures of the mortars with direct current application has been investigated. It is also researched that, the effect of graphene oxide on hydration temperature by direct current (DC) application on mortars. Through the application of 25 V DC to the 300 dosage mortars to which have different w/c ratios (0.55, 0.70, 0.90 and 1.00), their internal temperatures are increased as 1.26 °C, 1.78 °C, 4.25, and 3.30 °C, respectively. When they are compared to the same water/cement ratio of reference samples, it has been observed that, when 0.025 % ratio of graphene oxide has been added to admixture and also direct current has applied, hydration temperature values of mortars have been increased. Microscope views have been investigated from 300 dosage mortars whose w/c ratio is 0.90 and it is determined that CSH gel formation increases as using 0.025 % GO and DC stress intensity application. It is concluded that hydration reactions can be accelerated by applying electric current to the mortar and adding graphene oxide to the mixture.","PeriodicalId":54473,"journal":{"name":"Revista de la Construccion","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71304403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Comparison of non-linear dynamic frame response under recorded and numerically generated accelerograms 记录的和数值生成的加速度下非线性动力框架响应的比较

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2021-01-01 DOI: 10.7764/rdlc.20.3.576

O. Möller, J. P. Ascheri, Leandro Emanuel Nardi

引用次数: 1

Effects of glass fiber reinforced polymer pipe waste powder usage on concrete properties 玻璃钢管材废粉用量对混凝土性能的影响

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2021-01-01 DOI: 10.7764/rdlc.20.3.463

A. Saribiyik, G. Gurbuz

引用次数: 3