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Proceedings of 8th Symposium on Doctoral Studies in Civil Engineering最新文献

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Vulnerability assessment of building aggregates – macroseismic and analytical approach 建筑集料易损性评估-宏观地震与分析方法
Proceedings of 8th Symposium on Doctoral Studies in Civil Engineering Pub Date : 2023-09-04 DOI: 10.5592/co/phdsym.2022.01
Antonela Moretić, M. Stepinac
{"title":"Vulnerability assessment of building aggregates – macroseismic and analytical approach","authors":"Antonela Moretić, M. Stepinac","doi":"10.5592/co/phdsym.2022.01","DOIUrl":"https://doi.org/10.5592/co/phdsym.2022.01","url":null,"abstract":"Historical centers of many European cities, which are also the cultural centers, are composed of building aggregates formed mainly of masonry structural units. Limited space for expansion and population growth caused development of a new structural form – building aggregates. Croatia is no exception; for example, building aggregates are typical for historical Lower Town in Zagreb. Since the behavior of building aggregates in the case of an earthquake differs from the behavior of isolated structures, they represent a special challenge for civil engineers. The paper presents two approaches to the vulnerability assessment, with emphasis on the impact of aggregates, i.e., on the interaction of structures.","PeriodicalId":401176,"journal":{"name":"Proceedings of 8th Symposium on Doctoral Studies in Civil Engineering","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128286189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Use of visual programming in seismic assessment of masonry buildings according to normatively prescribed criteria of construction regularity 可视化规划在砌体建筑抗震评价中的应用
Proceedings of 8th Symposium on Doctoral Studies in Civil Engineering Pub Date : 2022-09-04 DOI: 10.5592/co/phdsym.2022.02
Karlo Ožić, M. Stepinac, Anthony Ninčević
{"title":"Use of visual programming in seismic assessment of masonry buildings according to normatively prescribed criteria of construction regularity","authors":"Karlo Ožić, M. Stepinac, Anthony Ninčević","doi":"10.5592/co/phdsym.2022.02","DOIUrl":"https://doi.org/10.5592/co/phdsym.2022.02","url":null,"abstract":"In Europe, as well as in Croatia, the topic of seismic resistance assessment is very relevant due to a large number of seismically active areas. This paper presents the possibility of using modern tools in assessing the seismic resistance of buildings. Using Grasshopper, a parametric software package contained in Rhinoceros 3D, the impact of conceptual design on structural behavior is analyzed. The analysis of geometrical characteristics of structures according to the regularity criteria set in Eurocode 1998-1 is carried out. The most important examined parameters are symmetry, compactness, slenderness of the floor plan and eccentricity of the construction. Also, the work is focused on optimizing the floor plan of existing structures. The goal of optimization is to reduce the distance between the center of mass and the center of rigidity of the building floor plan in order to reduce the impact of torsion on the structure. The paper examines the possibilities of using parametric programming and lays the foundations for further research.","PeriodicalId":401176,"journal":{"name":"Proceedings of 8th Symposium on Doctoral Studies in Civil Engineering","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121869752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An overview of methods for determining the impact of vibrations from tramway vehicles on nearby buildings 确定有轨电车振动对附近建筑物影响的方法概述
Proceedings of 8th Symposium on Doctoral Studies in Civil Engineering Pub Date : 2022-09-04 DOI: 10.5592/co/phdsym.2022.15
Krešimir Burnać, Ivo Haladin
{"title":"An overview of methods for determining the impact of vibrations from tramway vehicles on nearby buildings","authors":"Krešimir Burnać, Ivo Haladin","doi":"10.5592/co/phdsym.2022.15","DOIUrl":"https://doi.org/10.5592/co/phdsym.2022.15","url":null,"abstract":"Vibrations from tramway operations can potentially cause discomfort for the building residents and occupants and can be dangerous for buildings themselves because of their proximity to the tramway track. Big part of the Zagreb tramway traffic network is located within the historic city centre, at some locations distanced less than 7 meters away from the buildings. Since earthquake in 2020 this issue is even more relevant, and it is processed in detail in this paper. There is also an emphasis on previous research containing a few different measurements (on the tramway track, tramway vehicle and buildings) as a foundation for more detailed research in the future. The purpose of the vibration measurements is to build a model that would define parameters that are connected to different tramway vehicles and tram track. Also, it could predict the change of vibration levels in time, their propagation through the soil as well as the impact of vibrations on the surrounding buildings. That kind of model would serve as a direct indicator and an input to the tramway network operator on how to optimise the needed interventions on the track and in that way additionally lower maintenance costs and increase living standard in the cities.","PeriodicalId":401176,"journal":{"name":"Proceedings of 8th Symposium on Doctoral Studies in Civil Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129052220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Possibilities of using wood biomass ash as a partial replacement of fine aggregate in precast concrete 在预制混凝土中使用木材生物质灰部分替代细骨料的可能性
Proceedings of 8th Symposium on Doctoral Studies in Civil Engineering Pub Date : 2022-09-04 DOI: 10.5592/co/phdsym.2022.16
Sonja Cerković, N. Štirmer
{"title":"Possibilities of using wood biomass ash as a partial replacement of fine aggregate in precast concrete","authors":"Sonja Cerković, N. Štirmer","doi":"10.5592/co/phdsym.2022.16","DOIUrl":"https://doi.org/10.5592/co/phdsym.2022.16","url":null,"abstract":"According to the principles of the circular economy, there is great potential for developing synergies between the construction and energy sectors through the use of by-products from other industries or recycled materials in the concrete industry. The objective of this study is to determine the potential of using locally available wood biomass ash (WBA) as a partial substitute for fine aggregate (sand) in concrete. This paper presents the influence of WBA on the relevant mechanical properties and durability of precast concrete, where a part of fine aggregate (sand) was replaced by different types of WBA in a proportion of 15%, and its influence was investigated in relation to the prescribed requirements of precast manufacturers.","PeriodicalId":401176,"journal":{"name":"Proceedings of 8th Symposium on Doctoral Studies in Civil Engineering","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131198030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The influence of particle packing density optimization on the reduction of the amount of Portland cement in concrete 优化颗粒充填密度对降低混凝土中硅酸盐水泥用量的影响
Proceedings of 8th Symposium on Doctoral Studies in Civil Engineering Pub Date : 2022-09-04 DOI: 10.5592/co/phdsym.2022.18
Petra Štefanec, I. Gabrijel
{"title":"The influence of particle packing density optimization on the reduction of the amount of Portland cement in concrete","authors":"Petra Štefanec, I. Gabrijel","doi":"10.5592/co/phdsym.2022.18","DOIUrl":"https://doi.org/10.5592/co/phdsym.2022.18","url":null,"abstract":"In order to reduce the emission of CO2 and the harmful impact on the environment during the production of concrete, it is important to think about the design of concrete mixes. In practice, the amount of cement is reduced by using cement with mineral additives (fillers) or, more rarely, by replacing part of the cement with mineral additives during the preparation of concrete. This does not go into the detailed characterization of the additives, nor the analysis of possible physical and chemical interactions between the particles, which is why the real potential of replacing part of the cement is often not realized. A fundamental approach to the mentioned problem can be realized through the theory of particle packing. In this paper, the existing methods of optimizing particle packing are presented, an insight is given into the most important parameters that define particle packing, and finally, a review of the literature shows how the amount of Portland cement in concrete mixes is reduced in recent times by optimizing the density of particle packing.","PeriodicalId":401176,"journal":{"name":"Proceedings of 8th Symposium on Doctoral Studies in Civil Engineering","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115719860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Freeze-thaw resistance with de-icing salts of alkali-activated slag concrete: the influence of activator type and dosage and comparison to the ordinary Portland cement concrete 碱活化矿渣混凝土的抗冻融性能:活化剂种类和用量的影响及与普通硅酸盐水泥混凝土的比较
Proceedings of 8th Symposium on Doctoral Studies in Civil Engineering Pub Date : 2022-09-04 DOI: 10.5592/co/phdsym.2022.17
Olivera Bukvić, M. Serdar
{"title":"Freeze-thaw resistance with de-icing salts of alkali-activated slag concrete: the influence of activator type and dosage and comparison to the ordinary Portland cement concrete","authors":"Olivera Bukvić, M. Serdar","doi":"10.5592/co/phdsym.2022.17","DOIUrl":"https://doi.org/10.5592/co/phdsym.2022.17","url":null,"abstract":"This paper presents the results of an experimental study of the freeze-thaw resistance with de-icing salts (resistance to scaling) of three slag-based alkali-activated (AA) concrete mixes and the reference OPC concrete mix. The scaling resistance was tested on the samples subjected to the 7, 14, 28, 42 and 56 freezing and thawing cycles with 3% NaCl solution as freezing medium. The results showed that the increased sodium silicate content enhances the scaling resistance of the AA concrete. OPC concrete exhibited much higher scaling resistance up to 42 cycles, after which it showed severe damage, while the scaling of AA concrete mixes became more moderate after 7 cycles of testing.","PeriodicalId":401176,"journal":{"name":"Proceedings of 8th Symposium on Doctoral Studies in Civil Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127353143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analyses of LWT-FLOOR system bending resistance lwt -楼板系统抗弯性能分析
Proceedings of 8th Symposium on Doctoral Studies in Civil Engineering Pub Date : 2022-09-04 DOI: 10.5592/co/phdsym.2022.05
A. Rajić, I. Lukačević
{"title":"Analyses of LWT-FLOOR system bending resistance","authors":"A. Rajić, I. Lukačević","doi":"10.5592/co/phdsym.2022.05","DOIUrl":"https://doi.org/10.5592/co/phdsym.2022.05","url":null,"abstract":"Application of composite structural systems have many benefits, such as a prefabrication and long span capability, but also the optimal utilisation of structural steel and concrete which is given particulary by implementation of cold-formed steel (CFS) elements. This paper presents numerical parametric analysis on an innovative solution of a composite floor structure system consisting of built-up CFS elements and slabs. Type of connection between CFS elements and the degree of shear connection had the most significant impact on LWT-FLOOR system behaviour, while the corrugated web thickness, spot weld density and considered steel beam heights had less influence on the analysed composite system behaviour.","PeriodicalId":401176,"journal":{"name":"Proceedings of 8th Symposium on Doctoral Studies in Civil Engineering","volume":"262 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131198077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of the influence of geogrids on the failure mechanisms of the shallow foundations 土工格栅对浅基础破坏机制的影响分析
Proceedings of 8th Symposium on Doctoral Studies in Civil Engineering Pub Date : 2022-09-04 DOI: 10.5592/co/phdsym.2022.10
Anesa Merdan, Mario Bačić
{"title":"Analysis of the influence of geogrids on the failure mechanisms of the shallow foundations","authors":"Anesa Merdan, Mario Bačić","doi":"10.5592/co/phdsym.2022.10","DOIUrl":"https://doi.org/10.5592/co/phdsym.2022.10","url":null,"abstract":"The use of geosynthetic materials to improve soil bearing capacity below shallow foundation is relatively novel area of study of geotechnical engineering. A large number of studies have been carried out analysing impact of geosynthetic materials on the bearing capacity of the soil, and these are based mostly on experimental analysis and numerical simulations. This work gives an overview of studies about the application of reinforcement of soil with geogrids and their influences on the soil failure mechanisms. The work represents a basis for future investigations analysing the sensitivity of influence of the relevant parameters of geosynthetics on failure mechanisms.","PeriodicalId":401176,"journal":{"name":"Proceedings of 8th Symposium on Doctoral Studies in Civil Engineering","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128570557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
State of the art of the masonry building aggregates and retrofit strategies with emphasis on the City of Zagreb 最先进的砌体建筑集料和改造策略，重点是萨格勒布市
Proceedings of 8th Symposium on Doctoral Studies in Civil Engineering Pub Date : 2022-09-04 DOI: 10.5592/co/phdsym.2022.12
Jakov Oreb, J. Atalić
{"title":"State of the art of the masonry building aggregates and retrofit strategies with emphasis on the City of Zagreb","authors":"Jakov Oreb, J. Atalić","doi":"10.5592/co/phdsym.2022.12","DOIUrl":"https://doi.org/10.5592/co/phdsym.2022.12","url":null,"abstract":"Buildings aggregates are part of the typical architecture of the historical City center of Zagreb, along with many other city centers throughout Europe. The earthquake in the City of Zagreb (March 2020), and recent earthquakes in Italy, suggested the interaction of structural units within aggregate, and their complex behavior during earthquakes, including seismic pounding. Literature, current norms, and regulations for this problem still do not provide clear instructions. An overview of experimental and numerical methods from the available literature that analyze the mutual influence of buildings in aggregates regarding the characteristics of the City of Zagreb is presented. The emphasis is on unreinforced masonry structures numerical modeling and retrofitting strategies and interventions for the whole aggregate, and analysis of current engineering practice in Croatia.","PeriodicalId":401176,"journal":{"name":"Proceedings of 8th Symposium on Doctoral Studies in Civil Engineering","volume":"490 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123057694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Seismic performance assessment of traditional unreinforced masonry buildings in aggregates: the case of a modern building built in the place of the old one 传统非加筋砌体集料建筑抗震性能评价:以取代旧建筑的现代建筑为例
Proceedings of 8th Symposium on Doctoral Studies in Civil Engineering Pub Date : 2022-09-04 DOI: 10.5592/co/phdsym.2022.21
Maja Mrkonjić, J. Atalić
{"title":"Seismic performance assessment of traditional unreinforced masonry buildings in aggregates: the case of a modern building built in the place of the old one","authors":"Maja Mrkonjić, J. Atalić","doi":"10.5592/co/phdsym.2022.21","DOIUrl":"https://doi.org/10.5592/co/phdsym.2022.21","url":null,"abstract":"The topic of the doctoral thesis will be related to the analysis of the seismic behaviour of traditional buildings. According to existing regulations, the construction of a modern replacement building in masonry building aggregates should have a sufficient seismic divider (dilation) which prevents interaction between the buildings. Masonry building aggregates are built to act as a whole which has a favourable impact in the event of an earthquake, which was shown by analysis of the results of preliminary inspections of damage and usability of buildings after the Zagreb earthquake. The research objectives of the work relate to proving vulnerability levels depending on the layout and order of construction of individual buildings, the interaction of neighbouring buildings and the difference in the number and height of floors of neighbouring buildings within masonry building aggregates.","PeriodicalId":401176,"journal":{"name":"Proceedings of 8th Symposium on Doctoral Studies in Civil Engineering","volume":"315 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114959832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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