Archives of Civil Engineering最新文献_第3页

Proactive-reactive repetitive project scheduling method – the concept of risk consideration at the project planning and execution stage 积极主动-反应式重复项目进度安排法--在项目规划和执行阶段考虑风险的概念

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Archives of Civil Engineering Pub Date : 2023-12-21 DOI: 10.24425/ace.2023.147649

P. Jaśkowski, S. Biruk, Michał Krzemiński

{"title":"Proactive-reactive repetitive project scheduling method – the concept of risk consideration at the project planning and execution stage","authors":"P. Jaśkowski, S. Biruk, Michał Krzemiński","doi":"10.24425/ace.2023.147649","DOIUrl":"https://doi.org/10.24425/ace.2023.147649","url":null,"abstract":": The construction contractor is concerned with reducing the cost of the project, including reducing unnecessary downtime. This is achieved when resources are fully utilized; this means the crews work continuously moving without interruption from one location to the other. However, any disturbance in the optimally scheduled workﬂow caused by random events is likely to result in delays, interruptions in the crews work, and productivity losses. There is therefore a need for scheduling methods that allow plans to be more resilient to disruptions and ensure a reduction in downtime and implementation costs. The authors put forward a proactive-reactive approach to the schedule risk management. Proposed method makes it possible to protect schedule deadlines from the impact of risk factors by allocating time buﬀers (proactive approach). It also takes into account the measures that managers take during execution in response to delays that occur, such as changing construction methods, employing extra resources, or working overtime (reactive approach). It combines both ideas and is based on project simulation technique. The merits of the proposed approach are illustrated by a case of a repetitive project to erect a number of buildings. The presented example proves that the proposed method enables the planner to estimate the scale of delays of processes’ start and consider the impact of measures to reduce duration of processes in particular locations taken in reaction to delays. Thus, it is possible to determine the optimal schedule, at which the costs of losses associated with delays and downtime are minimal.","PeriodicalId":45753,"journal":{"name":"Archives of Civil Engineering","volume":"15 20","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138948442","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

Landslide triggered by small excavation – numerical simulations 小型挖掘引发的山体滑坡--数值模拟

IF 0.7

Archives of Civil Engineering Pub Date : 2023-12-21 DOI: 10.24425/ace.2023.147660

Michał Grodecki

{"title":"Landslide triggered by small excavation – numerical simulations","authors":"Michał Grodecki","doi":"10.24425/ace.2023.147660","DOIUrl":"https://doi.org/10.24425/ace.2023.147660","url":null,"abstract":": The main objective of this work is to present the results of numerical simulations of the landslide triggered by small excavation. In south-eastern Poland in 2019, during excavation for a gas pipeline (relatively small – maximal depth 2.7 m), a landslide was observed. Length of the landslide was about 80 m, width about 50 m, maximal depth 6.5 m. Excavation was partially buried. Observed cracks of the terrain surface were wide, up to 0.8 m. Stability of the landslide was analyzed using the proportionalreductionofthesoilstrengthparameters(c-ﬁreduction)algorithmwiththeuseofZSoil.PC Finite Element Method (FEM) system. Stability analysis of the slope before and after excavation was performed, together with analysis of the tendency of the landslide to propagate upwards. The obtained stability loss modes were compared with the results of the ﬁeld observations and a good correlation was noticed. Hypothesis that a landslide was triggered by small excavation was proved (although reasonable margin of safety was obtained for state before excavation, stability factor SF = 1 . 60). Use of residual soil strength parameters (instead of peak ones) and activation of cut-oﬀ (no tension) condition are advised. Presented methodology is open and can be used in engineering practice.","PeriodicalId":45753,"journal":{"name":"Archives of Civil Engineering","volume":"52 25","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138949432","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

Applying different soil stabilization mechanisms: a review 应用不同的土壤稳定机制：综述

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Archives of Civil Engineering Pub Date : 2023-12-21 DOI: 10.24425/ace.2023.147663

引用次数: 0

Experimental study of a new type of high-strength monolithic square-section concrete columns with spiral stirrups 带螺旋箍筋的新型高强度整体方形截面混凝土柱的试验研究

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Archives of Civil Engineering Pub Date : 2023-12-21 DOI: 10.24425/ace.2023.147662

Xianchao Zheng, Fan Liyun, Jun Zhao

引用次数: 0

Nonlinear static analysis of truss core sandwich beams in three-point bending test 三点弯曲试验中桁架核心夹层梁的非线性静力分析

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Archives of Civil Engineering Pub Date : 2023-12-21 DOI: 10.24425/ace.2023.147670

M. Wesołowski, Mariusz Ruchwa, S. Ručevskis

{"title":"Nonlinear static analysis of truss core sandwich beams in three-point bending test","authors":"M. Wesołowski, Mariusz Ruchwa, S. Ručevskis","doi":"10.24425/ace.2023.147670","DOIUrl":"https://doi.org/10.24425/ace.2023.147670","url":null,"abstract":": An analysis of sandwich beams with truss core is an important issue in many ﬁelds of industry such as civil engineering, automotive, aerospace or maritime. The objective of the present study is a nonlinear static response of sandwich beams subjected to the three-point bending test conﬁguration. The beams are composed of two parent components: upper and lower laminated face sheets (unidirectional tape) and a pyramidal truss core manufactured by means of 3D printing. A polyamide ﬁlament strengthened with chopped carbon ﬁbres – CF-PA-12 is used for the core development. The both, experimental and numerical analyses are presented. A detailed numerical model of the sandwich beam was developed in Abaqus software. The numerical model considers modelling of the adhesive joint with an additional layer of material placed between the parent components of the beam. A continuum hybrid solid shell elements were used to model the adhesive layer. In addition, a special care was taken to use an appropriate material model for the CF-PA-12 ﬁlament. To do so, the uniaxial tensile tests were performed on 3D printed samples. Having acquired the test data, a hyperelastic material model was evaluated based on a curve ﬁtting approach.","PeriodicalId":45753,"journal":{"name":"Archives of Civil Engineering","volume":"62 4","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138951010","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

Influence of soil anisotropic stiffness on the deformation induced by an open pit excavation 土壤各向异性刚度对露天基坑挖掘引起的变形的影响

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Archives of Civil Engineering Pub Date : 2023-12-21 DOI: 10.24425/ace.2023.147652

引用次数: 0

The housing market in Poland during the Covid-19 pandemic 科维德-19 大流行病期间波兰的住房市场

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Archives of Civil Engineering Pub Date : 2023-12-21 DOI: 10.24425/ace.2023.147666

Marek Bryx, Izabela Rudzka, Janusz Sobieraj

{"title":"The housing market in Poland during the Covid-19 pandemic","authors":"Marek Bryx, Izabela Rudzka, Janusz Sobieraj","doi":"10.24425/ace.2023.147666","DOIUrl":"https://doi.org/10.24425/ace.2023.147666","url":null,"abstract":": This article examines the impact of economic factors, such as changes in interest rates and inﬂation,ontheprimaryhousingmarketinPolandfromJanuary2019toSeptember2022,withparticular focusontheCovid-19pandemic.Theresearchproblemistounderstandhowtheseeconomicfactorshave aﬀected the housing market, and the research objective is to analyze the activity of developers, building permits issued, investments started, and housing loans granted. The research methodology involves the analysis of data from various sources, including oﬃcial statistics and reports from developers and investment funds. The research ﬁndings suggest that the decreased demand for housing loans has led to a signiﬁcant decline in the allocation of new housing. However, the emergence of new major players, such as leading European and global investment funds, could provide opportunities for developers. The study concludes that caution is warranted in starting new construction activity and that the best performance in housing production in the transition period to 2021 is unlikely to be exceeded in the current or subsequent years. The implications of this study are that developers need to consider economic factors and market trends when making decisions about new construction and that investment funds may play an increasingly important role in the housing market.","PeriodicalId":45753,"journal":{"name":"Archives of Civil Engineering","volume":"43 7","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138948889","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

Robust and reliability-based design optimization of steel beams 基于鲁棒性和可靠性的钢梁设计优化

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Archives of Civil Engineering Pub Date : 2023-12-21 DOI: 10.24425/ace.2023.147651

P. Zabojszcza, U. Radoń, Piotr Tauzowski

引用次数: 0

Laboratory tests of pull-off strength of chosen USPs attached to concrete sleepers 对连接到混凝土枕木上的所选 USP 的拉拔强度进行实验室测试

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Archives of Civil Engineering Pub Date : 2023-12-21 DOI: 10.24425/ace.2023.147658

引用次数: 0

Effect of icing as a non-structural mass on the variation of natural frequency of a lightweight lattice structure 作为非结构质量的结冰对轻质晶格结构固有频率变化的影响

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Archives of Civil Engineering Pub Date : 2023-12-21 DOI: 10.24425/ace.2023.147646

引用次数: 0