ce/papers最新文献_第2页

Fatigue strength of repair-welded headed studs 修复焊接带头螺栓的疲劳强度

ce/papers Pub Date : 2024-09-11 DOI: 10.1002/cepa.3078

Michael Volz

{"title":"Fatigue strength of repair-welded headed studs","authors":"Michael Volz","doi":"10.1002/cepa.3078","DOIUrl":"https://doi.org/10.1002/cepa.3078","url":null,"abstract":"<div>\u0000 \u0000 <p>Welded connections of headed studs are highly stressed details in bridge structures in steel-concrete composite construction and are largely responsible for the functionality of the supporting structures. At the same time, this detail requires a lot of resources due to the high welding effort and therefore has a major influence on the economic success. An important criterion for the economic and ecological balance of the structure is the durability of the welded joint, which is quantified by the fatigue strength. The welding of headed studs for composite bridges is usually carried out using fully mechanised drawn arc stud welding in accordance with EN ISO 14555. Due to the process, stud welds that do not fulfil the standard requirements for flawless condition may occur in individual cases. The design rules for stud load-bearing capacity in accordance with EN 1994-2 are based on tests and only apply to connections produced using drawn arc stud welding. In the past, there were practicable and tacitly accepted solutions for repairing such sporadically occurring faulty welds, but these were never systematically investigated. Particularly against the background of fatigue loading, repair-welded stud connections are now to be systematically investigated in a project funded by the AIF. The article provides an overview of the execution of stud welded joints and presents the tests planned in the project in order to achieve a practicable recommendation for the repair welding of headed studs.</p>\u0000 </div>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"7 3-4","pages":"138-142"},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cepa.3078","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142170096","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

Conversion of historical stone bridge to lifting bridge in the Hořín lock chamber 将历史悠久的石桥改建为霍林水闸闸室中的吊桥

ce/papers Pub Date : 2024-09-11 DOI: 10.1002/cepa.3075

Ing. Jan Blažek, Ing. Radek Navrátil

{"title":"Conversion of historical stone bridge to lifting bridge in the Hořín lock chamber","authors":"Ing. Jan Blažek, Ing. Radek Navrátil","doi":"10.1002/cepa.3075","DOIUrl":"https://doi.org/10.1002/cepa.3075","url":null,"abstract":"<p>The paper describes design and construction process of the unique reconstruction of the historical stone bridge at the lower head of the listed Hořín lock chamber at the confluence of the Vltava and Elbe rivers near Mělník. The original stone arch bridge from 1905 at the outlet of the lock had to be carefully dismantled and rebuilt into a lifting bridge with a vertical lift of 5 m. The goal was to preserve bridges original listed and preserved appearance and enable larger ships to pass under it. The design of reconstruction consisted of proposal of new substructure, new hidden steel superstructure, new hydraulic and mechanical parts and electronical controling system. The original appearence of the stone cladding had to be preserved, so new hidden truss steel kernel was inserted to form the support for the original stone cladding and concrete coupling shell. The stroke of the bridge is controlled electronically by hydraulic cylinders and a system of guides and restraints. The reconstruction of this unique bridge had been carrefully performed under surveilance of National Heritage Office. The project recieved the Czech Construction of the Year 2022 award.</p>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"7 3-4","pages":"121-124"},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142170067","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

Investigations On the Effective Width of Wide Flange Steel Girders 宽翼缘钢梁有效宽度研究

ce/papers Pub Date : 2024-09-11 DOI: 10.1002/cepa.3089

Encho Dulevski, Vasil Nikolov, Alexander Jiponov

引用次数: 0

Aerodynamic Performance-Based Design for Steel Bridges and Embodied Carbon Awareness 基于空气动力性能的钢桥设计和体现碳意识

ce/papers Pub Date : 2024-09-11 DOI: 10.1002/cepa.3086

Emanuele Mattiello, Guy L. Larose

引用次数: 0

Comparison of Durability of Composite-Based Shear connectors 复合材料剪力连接件耐久性比较

ce/papers Pub Date : 2024-09-11 DOI: 10.1002/cepa.3074

Michala Weissová, Vincent Kvočák, Daniel Dubecký, Patrícia Vaňová

{"title":"Comparison of Durability of Composite-Based Shear connectors","authors":"Michala Weissová, Vincent Kvočák, Daniel Dubecký, Patrícia Vaňová","doi":"10.1002/cepa.3074","DOIUrl":"https://doi.org/10.1002/cepa.3074","url":null,"abstract":"<p>This research paper offers an in-depth comparative analysis focused on the long-term durability of shear connectors fabricated from composite materials within a composite and concrete beam structure, extending over a length of six meters. To carry out this evaluation, the experiment employs a four-point bending test designed to rigorously assess the performance and efficacy of two distinct types of tie straps utilized within the structure. The central element of this investigation, a composite beam integrated within a concrete deck, serves as the primary test specimen, providing a realistic and applicable context for the assessment. The overarching goal of this study is to meticulously examine and compare the resilience and resistance of these shear connectors when subjected to realistic, practical loading conditions. By doing so, the research aims to shed light on the critical performance characteristics of composite shear connectors, especially their role and effectiveness in enhancing the structural integrity and durability of composite and concrete beams in various structural applications. The outcomes of this study are expected to offer significant insights and contribute valuable knowledge to the field of structural engineering, particularly in understanding and improving the performance of composite shear connectors in structural frameworks.</p>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"7 3-4","pages":"106-110"},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142170070","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

Preliminary design of a viaduct on new Highspeed line RS2 VRT Jižní Morava 新高速线路 RS2 VRT Jižní Morava 高架桥的初步设计

ce/papers Pub Date : 2024-09-11 DOI: 10.1002/cepa.3061

Samuel Franko, Martin Hukel

{"title":"Preliminary design of a viaduct on new Highspeed line RS2 VRT Jižní Morava","authors":"Samuel Franko, Martin Hukel","doi":"10.1002/cepa.3061","DOIUrl":"https://doi.org/10.1002/cepa.3061","url":null,"abstract":"<p>The newly proposed high-speed rail in Czech Republic creates a set of new challenges for engineers in design overall. In this case, the most significant challenge was to design a viaduct over several obstacles due to the crossing of Special Area of Conservation (SAC), part of Natura 2000. This aims to limit impacts in short-term, during construction and more importantly in the long term. Construction of the viaduct will mitigate an impact to the natural surrounding area, whilst allowing immigration of its natural habitats. Nevertheless, the viaduct design and operational speeds will reach 320 km/h with possible raising to 350 km/h limit, with minimal impact within the area.</p><p>Initial length of the viaduct was over 1 300 m and the main requirement given by an infrastructure manager was to design a viaduct without railway expansion joints. Due to such a long distance, the viaduct had to be separated into several dilatation segments in order to avoid the use of rail expansion joint. The most susceptible parts of SAC were in proximity of the river Šatava and surrounding wetlands. This area created an obstacle, which had to be crossed by a long span avoiding the implementation of bridge piers. Poor geological conditions close to the watercourse had to be taken into consideration for design of pier foundation, therefore the span had to be shortened to a compromised length.</p><p>The final design of the viaduct consists of 16 segments, of which 14 are continuous segments and 4 are single spans. Overall, there are 29 spans over the length of the viaduct. Construction method of incremental launching had been chosen to reduce the short-term impact in the SAC.</p>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"7 3-4","pages":"38-43"},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142170158","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

Development of a lamella-model to evaluate stresses caused by hot asphalt installation 开发用于评估热沥青安装应力的薄片模型

ce/papers Pub Date : 2024-09-11 DOI: 10.1002/cepa.3064

Damian Händeler, Achim Geßler, Kevin Wolters, Markus Feldmann

{"title":"Development of a lamella-model to evaluate stresses caused by hot asphalt installation","authors":"Damian Händeler, Achim Geßler, Kevin Wolters, Markus Feldmann","doi":"10.1002/cepa.3064","DOIUrl":"https://doi.org/10.1002/cepa.3064","url":null,"abstract":"<div>\u0000 \u0000 <p>On road-bridges hot asphalt is installed to provide a level and waterproof surface. That wearing surface, however, needs occasional renewal. On a number of steel highway-bridges it has been observed that after such asphalt-renewal fatigue-cracks have increasingly occurred at the welds of orthotropic bridge-decks. The German Federal Highway Research Institute has assigned a research project to RWTH Aachen University to evaluate the response of steel-bridges to time- and location-dependent, nonlinear temperature profiles. Since FEM-software with the needed level of detailing could not provide solutions for long large-span bridges, a software-based lamella-model was developed. This model enables the partition of the bridge into rectangular beam-lamella, precisely considers the nonlinear temperature and calculates the inner forces and displacements along the bridge. This paper presents the theoretical background of the lamella-program as well as results calculated exemplary for a 742m-long German highway-bridge including validation with in situ temperature and strain measurements during asphalting.</p>\u0000 </div>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"7 3-4","pages":"56-61"},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cepa.3064","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142170155","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

OA14 - BOWSTRING OF THE NEW RAILWAY LINE LUXEMBOURG-BETTEMBOURG – CONSTRUCTION AND SPECIAL DESIGN CHALLENGES FOR HANGERS OA14 - 卢森堡-贝敦堡新铁路线的弓弦 - 施工和吊架的特殊设计挑战

ce/papers Pub Date : 2024-09-11 DOI: 10.1002/cepa.3056

Patrick NOSBUSCH, Ettore SCIAN, Andrea DE CILLIA

引用次数: 0

Design and assembly of a new extradosed bridge in Nuremberg 纽伦堡新引渡桥的设计与组装

ce/papers Pub Date : 2024-09-11 DOI: 10.1002/cepa.3058

Thomas Klähne, Mike Owusu-Yeboah, Matthias Weißbach

引用次数: 0

Experimental and theoretical evaluation of axial forces in short steel ropes 短钢绳轴向力的实验和理论评估

ce/papers Pub Date : 2024-09-11 DOI: 10.1002/cepa.3066

Rudolf Ároch, Michal Kováč, Michal Venglár, Tomáš Klas

引用次数: 0