[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-122997-en":3,"doc-seo-122997-105":30,"detail-sidebar-cat-0-en-105":91},{"code":4,"msg":5,"data":6},0,"success",{"doc_id":7,"user_id":8,"nickname":9,"user_avatar":10,"doc_module":4,"category_id":11,"category_name":12,"doc_title":13,"doc_description":14,"doc_content":15,"file_id":16,"file_url":17,"file_type":18,"file_size":19,"view_count":4,"is_deleted":4,"is_public":20,"is_downloadable":20,"audit_status":20,"page_count":21,"language":22,"language_code":23,"site_id":24,"html_lang":23,"table_of_contents":25,"faqs":26,"seo_title":27,"seo_description":14,"update_tm":28,"read_time":29},122997,2336464648322,"Aria","https://ap-avatar.wpscdn.com/avatar/2200025388227c56fec?_k=1778556882303663488",8,"Research & Report","Structural analysis of dapped-end beams through machine learning techniques","Dapped-end beams (half-joints) are widely used in reinforced concrete bridge elements and in roofs and flooring of prefabricated buildings, yet their geometry creates discontinuity zones with concentrated stresses. Key performance depends on multiple parameters, including material strengths and reinforcement quantity and layouts, which also shape the failure mode. A literature review was used to compile an experimental database and support statistical analysis of ultimate load capacity and failure behavior. The resulting dataset trained supervised regression machine-learning models to predict ultimate capacity.","Bridge Maintenance, Safety, Management, Digitalization and Sustainability – Jensen, Frangopol & Schmidt (eds)  \n© 2024 The Author(s), ISBN 978-1-032-77040-6  \n[Open Access: www.taylorfrancis.com](Open Access: www.taylorfrancis.com), CC BY-NC-ND 4.0 license  \nStructural analysis of dapped-end beams through machine learning techniques  \nV. Picciano, G. Santarsiero, A. Masi & A. Digrisolo School of Engineering, University of Basilicata, Potenza, Italy  \nABSTRACT: Dapped-end beams (or half-joints) are extensively used in both reinforced concrete bridge structures and roofs and flooring for prefabricated buildings. Due to their geometric configuration, they represent discontinuity regions where high stresses concentrate. Therefore, it is crucial to evaluate the load-bearing capacity of these elements which may depend on various parameters, such as the strength of materials, the quantity and the different layouts of the used reinforcements which also significantly influence their failure mode. For this purpose, a literature review led to the creation of an experimental tests database used to conduct an in-depth statistical analysis, considering the influence of various parameters on the ultimate load capacity and failure mode of dapped-end beams. The collected database has been also used to train a regression model with supervised machine learning techniques in order to predict the ultimate capacity of dapped-end beams.  \n1 INTRODUCTION  \nDapped-end beams have some advantages related to construction speed as connections are represented by half-joints (Figure 1) which facilitate the installation operations. In bridge structures, dapped-end beams are used as part of the cantilever bridges (also called Gerber bridges) for their capability of absorbing small settlements along with a convenient stress distribution. Geometrical details of dapped-end regions make them disturbed regions in which the Bernoulli theory cannot be applied to evaluate stresses and carry out the due safety checks, requiring purposely set-up assessment methods.  \nIn fact, the load-bearing capacity of dapped-end beams can be assessed through different analytical and numerical methods. For example, strut-and-tie models (Mattock 2012, EN 1992-2 2005), eventually accounting for deterioration (Desnerck et al. 2018), are among the lower-bound methods, capable of providing conservative assessments.  \nThe strut-and-tie method (STM) is based on the definition of a truss model that must be consistent with the behavior of dapped-ends observed during experiments in order to idealize the force flow in the recessed part of the beam end. STM trusses that better approximate the force flow in a structural component allow the design of an efficient reinforcement layout increasing the specific failure load and minimizing the occurrence of cracks under the service loads (Mattock 2012) . Eurocode 2 (EN 1992-2 2005) provides two alternative models and related reinforcement layouts (one considering only horizontal and vertical bars while the other accounts for the inclined reinforcement also) which can be combined to evaluate to overall strength of a half-joint. A design method is also reported in the PCI Design Handbook (2010) mainly devoted to precast elements belonging to buildings. This method is based on an experimental investigation in which several potential failure modes were highlighted. In particular, the safety checks of different reinforcement devices are made concerning five specific possible failure modes which can affect both the undapped and the dapped regions of the half-joint. The PCI method has some limitations compared to STM since does not consider inclined rebars and is valid for cases where the shear  \nDOI: 10. 1201/9781003483755-27  \nFigure 1. Typical dapped-end beam and half-joint detail.  \nspan-to-depth ratio does not exceed 1.0. For these reasons, it is hardly helpful in the assessment of existing dapped-end elements.  \nBesides STM and PCI methods, kinematic me","cbCaic3IeRHESktm","https://ap.wps.com/l/cbCaic3IeRHESktm","pdf",329253,1,9,"English","en",105,"# Introduction\n## Strut-and-tie models (STM) and reinforcement layouts\n## Kinematic and numerical assessment approaches\n## Literature review, experimental database, and statistical analysis\n## Supervised machine learning for ultimate strength prediction","[{\"question\":\"Why are dapped-end beams considered critical to assess?\",\"answer\":\"Their recessed geometry forms discontinuity regions where stresses concentrate. This prevents straightforward application of Bernoulli theory and makes capacity evaluation essential.\"},{\"question\":\"How do reinforcement parameters affect dapped-end beam behavior?\",\"answer\":\"Ultimate load capacity and the failure mode depend on material strength and on reinforcement quantity and layout. Different reinforcement layouts can correlate with specific failure modes.\"},{\"question\":\"What role does machine learning play in the document?\",\"answer\":\"An experimental database is used to train supervised regression models that predict the ultimate strength of dapped-end beam specimens, enabling fast assessment.\"}]","Structural analysis of dapped-end beams through machine learning techniques | PDF",1785814091,23,{"code":4,"msg":31,"data":32},"ok",{"site_id":24,"language":23,"slug":33,"title":13,"keywords":34,"description":14,"schema_data":35,"social_meta":86,"head_meta":88,"extra_data":90,"updated_unix":28},"structural-analysis-of-dapped-end-beams-through-machine-learning-techniques","",{"@graph":36,"@context":85},[37,54,68],{"@type":38,"itemListElement":39},"BreadcrumbList",[40,44,48,51],{"item":41,"name":42,"@type":43,"position":20},"https://docshare.wps.com","Home","ListItem",{"item":45,"name":46,"@type":43,"position":47},"https://docshare.wps.com/document/","Document",2,{"item":49,"name":12,"@type":43,"position":50},"https://docshare.wps.com/document/research-report/",3,{"item":52,"name":13,"@type":43,"position":53},"https://docshare.wps.com/document/structural-analysis-of-dapped-end-beams-through-machine-learning-techniques/122997/",4,{"url":52,"name":13,"@type":55,"author":56,"headline":13,"publisher":58,"fileFormat":61,"inLanguage":23,"description":14,"dateModified":62,"datePublished":62,"encodingFormat":61,"isAccessibleForFree":63,"interactionStatistic":64},"DigitalDocument",{"name":9,"@type":57},"Person",{"url":41,"name":59,"@type":60},"DocShare","Organization","application/pdf","2026-08-04",true,{"@type":65,"interactionType":66,"userInteractionCount":4},"InteractionCounter",{"@type":67},"ViewAction",{"@type":69,"mainEntity":70},"FAQPage",[71,77,81],{"name":72,"@type":73,"acceptedAnswer":74},"Why are dapped-end beams considered critical to assess?","Question",{"text":75,"@type":76},"Their recessed geometry forms discontinuity regions where stresses concentrate. This prevents straightforward application of Bernoulli theory and makes capacity evaluation essential.","Answer",{"name":78,"@type":73,"acceptedAnswer":79},"How do reinforcement parameters affect dapped-end beam behavior?",{"text":80,"@type":76},"Ultimate load capacity and the failure mode depend on material strength and on reinforcement quantity and layout. Different reinforcement layouts can correlate with specific failure modes.",{"name":82,"@type":73,"acceptedAnswer":83},"What role does machine learning play in the document?",{"text":84,"@type":76},"An experimental database is used to train supervised regression models that predict the ultimate strength of dapped-end beam specimens, enabling fast assessment.","https://schema.org",{"og:url":52,"og:type":87,"og:title":13,"og:site_name":59,"og:description":14},"article",{"robots":89,"canonical":52},"index,follow",{"doc_id":7,"site_id":24},{"code":4,"msg":5,"data":92},[93,97,101,105,110,115,120,123,127,130,134],{"id":20,"doc_module":4,"doc_module_name":46,"category_name":94,"show_sort_weight":95,"slug":96},"Story & Novel",90,"story-novel",{"id":47,"doc_module":4,"doc_module_name":46,"category_name":98,"show_sort_weight":99,"slug":100},"Literature",80,"literature",{"id":53,"doc_module":4,"doc_module_name":46,"category_name":102,"show_sort_weight":103,"slug":104},"Exam",70,"exam",{"id":106,"doc_module":4,"doc_module_name":46,"category_name":107,"show_sort_weight":108,"slug":109},5,"Comic",60,"comic",{"id":111,"doc_module":4,"doc_module_name":46,"category_name":112,"show_sort_weight":113,"slug":114},6,"Technology",50,"technology",{"id":116,"doc_module":4,"doc_module_name":46,"category_name":117,"show_sort_weight":118,"slug":119},7,"Healthcare",40,"healthcare",{"id":11,"doc_module":4,"doc_module_name":46,"category_name":12,"show_sort_weight":121,"slug":122},30,"research-report",{"id":21,"doc_module":4,"doc_module_name":46,"category_name":124,"show_sort_weight":125,"slug":126},"Religion & Spirituality",20,"religion-spirituality",{"id":125,"doc_module":4,"doc_module_name":46,"category_name":128,"show_sort_weight":125,"slug":129},"World Cup","world-cup",{"id":131,"doc_module":4,"doc_module_name":46,"category_name":132,"show_sort_weight":131,"slug":133},10,"Lifestyle","lifestyle",{"id":135,"doc_module":4,"doc_module_name":46,"category_name":136,"show_sort_weight":106,"slug":137},19,"General","general"]