Civil Engineering Design最新文献_第3页

Fire design approach for modern vehicles with combustion or electrical engine 现代内燃机或电动汽车的防火设计方法

Civil Engineering Design Pub Date : 2023-08-24 DOI: 10.1002/cend.202300011

Jochen Zehfuß, Lisa Sander, Peter Schaumann, Patrick Meyer

{"title":"Fire design approach for modern vehicles with combustion or electrical engine","authors":"Jochen Zehfuß, Lisa Sander, Peter Schaumann, Patrick Meyer","doi":"10.1002/cend.202300011","DOIUrl":"https://doi.org/10.1002/cend.202300011","url":null,"abstract":"Due to climate changes and environmental considerations, the current transportation changes to modern vehicles with different vehicles models and engine types. Especially vehicles with alternative types of drive, such as electrical vehicles, are increasing. This raises the question of whether modern vehicles, such as electric vehicles, lead to an increased fire risk as well as an increased heat release rate (HRR). In this article, a new fire design approach for modern vehicles is presented to evaluate the fire risk of electric vehicles compared to vehicles with combustion engines with respect to the fire resistance of the structural elements in open car parks. For this purpose, HRRs of different vehicles are analyzed and an approximated approach for modern vehicles is derived. The methodology can be used for performance-based design, where the HRR plays a fundamental role. Furthermore, modeling approaches of the vehicle dimensions are presented, which are based on statistical data of the German Federal Motor Transport Authority. The vehicle dimensions are used to determine the fire spread time between vehicles using a parameter study. Based on the statistical data analyses and the parameter studies, this article provides a new fire design approach for modern vehicles in fire.","PeriodicalId":100248,"journal":{"name":"Civil Engineering Design","volume":"5 3-4","pages":"56-64"},"PeriodicalIF":0.0,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cend.202300011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50118692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison of calculation models for flexural capacity of RC beams strengthened with TRC in China and Germany 中德TRC加固RC梁抗弯承载力计算模型比较

Civil Engineering Design Pub Date : 2023-07-26 DOI: 10.1002/cend.202100057

Ronghua Xu, Manfred Curbach

{"title":"Comparison of calculation models for flexural capacity of RC beams strengthened with TRC in China and Germany","authors":"Ronghua Xu, Manfred Curbach","doi":"10.1002/cend.202100057","DOIUrl":"https://doi.org/10.1002/cend.202100057","url":null,"abstract":"The new innovative composite material textile reinforced concrete (TRC) has been intensively investigated in Germany since the end 1990s. It has become increasingly important in the construction industry. Compared with conventional steel reinforcement, TRC has advantages such as higher load-bearing capacity, higher strength-to-weight ratio, better ductility, and non-corrosive behavior. This made them a subject of extensive research and diverse applications both nationally and internationally. In 2004, Xu et al. started research on bond properties of TRC in China in cooperation with Hans-Wolf Reinhardt et al. from the University of Stuttgart in Germany. Since then, there have been numerous researches on TRC in China. This article introduces a calculation method for the flexural capacity of reinforced concrete (RC) beams strengthened with TRC in China. For comparison, the dimensioning procedure in Germany is also presented. Subsequently, the two models are compared with each other in a case study. Both models in China and Germany have the same mathematical background and also provide similar results. However, they have some differences in definitions of material characteristics (e.g., design concrete compressive strength, strain, and stress distribution) and consideration of the damage resulting from the preloading stage.","PeriodicalId":100248,"journal":{"name":"Civil Engineering Design","volume":"5 3-4","pages":"46-55"},"PeriodicalIF":0.0,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cend.202100057","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50154580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of water saturation on the compressive strength of concrete under high strain rates 高应变率下水饱和度对混凝土抗压强度的影响

Civil Engineering Design Pub Date : 2023-03-25 DOI: 10.1002/cend.202200015

Oliver Mosig, Birgit Beckmann, Manfred Curbach

引用次数: 0

A brief introduction to polymers and concepts of polymer modification of bentonite for barrier applications 聚合物简介及聚合物改性膨润土的概念

Civil Engineering Design Pub Date : 2023-01-18 DOI: 10.1002/cend.202200019

Wolfgang Lieske, Rowena Verst, Kent von Maubeuge, Torsten Wichtmann

引用次数: 0

Corrosion behavior of embedded pad hook in glass fiber reinforced concrete 玻璃钢混凝土中预埋垫钩的腐蚀行为

Civil Engineering Design Pub Date : 2023-01-18 DOI: 10.1002/cend.202200012

Volkan Özdal, Muhammed Maraşli, Husnu Gerengi, Kader Dikmen

{"title":"Corrosion behavior of embedded pad hook in glass fiber reinforced concrete","authors":"Volkan Özdal, Muhammed Maraşli, Husnu Gerengi, Kader Dikmen","doi":"10.1002/cend.202200012","DOIUrl":"https://doi.org/10.1002/cend.202200012","url":null,"abstract":"Glass fiber reinforced concrete (GFRC) comprises of hydration products of cement or cement plus sand, and glass fibers which take part in the concrete as reinforcement characteristics. GFRC has been used for over 50 years in several construction elements, such as facade panels, decorative no recoverable formwork, and other products. However, various anchor elements and pad hooks are needed to attach large or small parts made of GFRC panels to the main structure of the buildings. The corrosion rate of embedded metal fasteners over time is related to the water impermeability properties of the GFRC elements. In this study, corrosion of an electro galvanized pad hook embedded in 10–20 mm of the GFRC panel was investigated as a result of the salt spray test performed in accordance with ASTM B 117 standards. At the end of the experiment, the embedded pad hook was taken from the GFRC and analyzed by scanning electron microscopy, energy-dispersive spectroscopy methods. The results showed that the embedded pad hook in the GFRC, which was examined in the test procedures comply with the TS EN 12467 standards, was not corroded by 120-h test carried out in accordance with ASTM B 117 standards.","PeriodicalId":100248,"journal":{"name":"Civil Engineering Design","volume":"5 1-2","pages":"18-24"},"PeriodicalIF":0.0,"publicationDate":"2023-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50136919","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

Location-specific target load level and object-specific load models for recalculation based on structural monitoring 基于结构监测重新计算的特定位置目标荷载水平和特定对象荷载模型

Civil Engineering Design Pub Date : 2022-12-23 DOI: 10.1002/cend.202200023

Nico Steffens, Karsten Geißler

引用次数: 0

Determination of object-specific traffic-load-models for existing road bridges based on traffic data 基于交通数据的现有道路桥梁特定对象交通荷载模型的确定

Civil Engineering Design Pub Date : 2022-12-15 DOI: 10.1002/cend.202200022

Ursula Freundt, Sebastian Böning, Eberhard Pelke

引用次数: 0

Thermodynamic topology optimization for sequential additive manufacturing including structural self-weight 包含结构自重的顺序增材制造热力学拓扑优化

Civil Engineering Design Pub Date : 2022-12-08 DOI: 10.1002/cend.202200007

Miriam Kick, Dustin R. Jantos, Philipp Junker

引用次数: 1

Distributed strain measurements in thin expansive concrete slabs with biaxial textile reinforcement 双轴纺织钢筋膨胀混凝土薄板的分布应变测量

Civil Engineering Design Pub Date : 2022-08-28 DOI: 10.1002/cend.202200002

Katarzyna Zdanowicz, Birgit Beckmann, Steffen Marx

引用次数: 1

The new approval for the sustainable strengthening of existing structures with carbon reinforced concrete 新批准的可持续加强现有结构与碳增强混凝土

Civil Engineering Design Pub Date : 2022-05-18 DOI: 10.1002/cend.202100052

Maximilian May, Alexander Schumann, Sebastian May

{"title":"The new approval for the sustainable strengthening of existing structures with carbon reinforced concrete","authors":"Maximilian May, Alexander Schumann, Sebastian May","doi":"10.1002/cend.202100052","DOIUrl":"10.1002/cend.202100052","url":null,"abstract":"The latest global events have shown that climate protection belongs to the biggest current issues of today. In order to initiate the change that is urgently needed, future-oriented processes are required. The excessive use of resources and the associated CO2 emissions in the construction sector have reached levels that are harmful to the environment and will burden the future generations. Furthermore, a worrisome trend has emerged in the construction industry in recent years. Instead of preserving old and existing building structures, demolition and replacement construction is preferred. Environmental aspects or the historical value of monuments and listed buildings play no role, even though these are essential considerations of our time! How can we put an end to the waste of resources and destruction of local building history? With new and innovative materials—such as the high-performance composite material carbon reinforced concrete, especially in the field of renovation and strengthening of existing structures. A new and improved approval enables to strengthen structures more efficiently and therefore, to save material. As a result, buildings are not only protected from demolition, but also remain being used sustainably.","PeriodicalId":100248,"journal":{"name":"Civil Engineering Design","volume":"4 1-3","pages":"72-78"},"PeriodicalIF":0.0,"publicationDate":"2022-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83817977","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: 1