Hormigon y Acero最新文献

Ruedas trianguladas de radios traccionados con perfil biconvexo y planta elíptica 三角形张力辐条车轮，具有双凸面轮廓和椭圆形车轮底座

Hormigon y Acero Pub Date : 2023-09-27 DOI: 10.33586/hya.2023.3128

Rodrigo Martín-Sáiz, Blas Herrera

{"title":"Ruedas trianguladas de radios traccionados con perfil biconvexo y planta elíptica","authors":"Rodrigo Martín-Sáiz, Blas Herrera","doi":"10.33586/hya.2023.3128","DOIUrl":"https://doi.org/10.33586/hya.2023.3128","url":null,"abstract":"En este artículo, desarrollamos analíticamente el paso a paso de un procedimiento de diseño paramétrico de ruedas trianguladas de radios traccionados de perfil biconvexo para estructuras de cubierta sobre graderíos de estadios con planta elíptica. A través de este procedimiento, es posible definir la forma geométrica y la distribución de fuerzas de pretensado necesarias para conseguir unas condiciones óptimas de dimensionado de la sección transversal del anillo exterior, atendiendo a su no-circularidad. Estas condiciones óptimas se consiguen cuando, en situación de carga permanente, la rueda se deforma homotéticamente en planta. En cada paso del procedimiento formulamos los sistemas de ecuaciones que describen la relación entre la forma geométrica y el comportamiento mecánico, y definimos los métodos numéricos para resolverlos.A partir de la forma en planta de diversos anfiteatros romanos, desarrollamos ejemplos de aplicación y mostramos los límites geométricos razonables del procedimiento de diseño. Por último, en un modelo de análisis comprobamos cómo, efectivamente, una estructura diseñada según este procedimiento se deforma homotéticamente en situación de cargas permanentes.","PeriodicalId":41423,"journal":{"name":"Hormigon y Acero","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135536309","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

Evaluation of horizontal loads in the concept design of tall building concrete structures 高层建筑混凝土结构概念设计中水平荷载的计算

Hormigon y Acero Pub Date : 2023-09-15 DOI: 10.33586/hya.2023.3094

Carlos Muñoz Blanc, Inma Fortea Navarro

引用次数: 0

Blast Absorption Capacity of Brittle Mineral Foam: an Experimental Evaluation 脆性矿物泡沫吸爆性能的实验研究

Hormigon y Acero Pub Date : 2023-09-13 DOI: 10.33586/hya.2023.3131

Aldjabar Aminou, Mohamed Ben-Rhouma, Bachir Belkassem, Hamza Ousji, Oussama Atoui, Lincy Pyl, David Lecompte

{"title":"Blast Absorption Capacity of Brittle Mineral Foam: an Experimental Evaluation","authors":"Aldjabar Aminou, Mohamed Ben-Rhouma, Bachir Belkassem, Hamza Ousji, Oussama Atoui, Lincy Pyl, David Lecompte","doi":"10.33586/hya.2023.3131","DOIUrl":"https://doi.org/10.33586/hya.2023.3131","url":null,"abstract":"Cellular materials, such as aluminum foam, have proven to be effective energy absorbents. They can be used as the crushable core for blast mitigation sacrificial cladding. In this paper insights into the blast response of a brittle mineral foam-based sacrificial cladding are presented. The experimental set-up used consists of a rigid steel frame (1000 mm × 1000 mm × 15 mm) with a square cavity of 300 mm x 300 mm in the center. An aluminum plate, representing the structure, with a total surface of 400 mm × 400 mm and a thickness of 2 mm is clamped into the steel frame. Two synchronized high-speed cameras in a stereoscopic configuration are used to capture the dynamic response of the aluminum plate at a frame rate of 20000 frames per second. The transient deformation fields are computed using a three-dimensional digital image correlation technique. The blast load is obtained by detonating 20 g of C4 placed at a distance of 250 mm from the center of the tested aluminum plate. The absorption capacity of the brittle mineral foam is assessed by comparing the out-of-plane displacement, the velocity, the acceleration and the major principal strain of the thin aluminum plate with and without the protective mineral foam. Two foam configurations with different thicknesses are considered: 60 mm and 120 mm. It is shown that adding the brittle mineral foam reduces the out-of-plane displacement together with the displacement velocity and acceleration of the aluminum plate at least by a factor of two. Post-mortem analysis of the foams shows that mitigation of the blast load in the present set-up and under the considered loading is partially obtained by crushing of the cell walls but mostly though the growth of cracks in the specimen.","PeriodicalId":41423,"journal":{"name":"Hormigon y Acero","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135689446","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

Sobre el diseño de capiteles metálicos en forjados unidireccionales de edificación 关于单向建筑楼板金属首都的设计

Hormigon y Acero Pub Date : 2023-09-08 DOI: 10.33586/hya.2023.3072

Sergio Morales Rodriguez

引用次数: 0

Energy Flow Considerations for Structural Response under Blast 爆炸作用下结构响应的能量流考虑

IF 0.1

Hormigon y Acero Pub Date : 2023-08-03 DOI: 10.33586/hya.2023.3130

K. Willems, T. Krauthammer, A. Ohrt

引用次数: 0

A Study on the Distribution of Shear Forces Between Resisting Mechanisms in an RC Element Without Stirrups 无箍筋RC单元中抵抗机构间剪切力分布的研究

IF 0.1

Hormigon y Acero Pub Date : 2023-07-11 DOI: 10.33586/hya.2023.3122

A. P. Caldentey

{"title":"A Study on the Distribution of Shear Forces Between Resisting Mechanisms in an RC Element Without Stirrups","authors":"A. P. Caldentey","doi":"10.33586/hya.2023.3122","DOIUrl":"https://doi.org/10.33586/hya.2023.3122","url":null,"abstract":"This paper explores how the shear force distributes itself among the three main shear resistance mechanisms: shear resistance of the uncracked compressed chord, aggregate interlock, and dowel effect. Today’s dominating shear models, the critical crack theory (Muttoni et al. [1]) and the compression field theory (Collins et al. [2]) maintain that the main shear-resisting mechanism is aggregate interlock, while more recent studies (Marí et al. [3]), maintain that the main resistance mechanism is the shear resistance on the uncracked compression chord. \u0000In this paper FEM modelling is used to study a test carried out at the Universidad Politécnica de Madrid (UPM) to try to assign the shear force to the different shear mechanisms for different loading steps and elucidate what finally causes the failure of the structure. The results show that as load is increased the relative part of the shear force taken by the uncracked compressed chord increases until finally shear failure is reached when the principal tensile stress in the area located close to the load but towards the support reaches the tensile resistance of concrete, generating a crack that precipitates the failure of the beam.","PeriodicalId":41423,"journal":{"name":"Hormigon y Acero","volume":" ","pages":""},"PeriodicalIF":0.1,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48064207","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

El puente de Villanueva de la Reina sobre el Guadalquivir (Jaén). Diseño estructural y constructivo de una obra histórica de hormigón armado 瓜达尔基维尔河上的Villanueva de la Reina桥(jaen)。历史钢筋混凝土工程的结构和施工设计

IF 0.1

Hormigon y Acero Pub Date : 2023-07-06 DOI: 10.33586/hya.2023.3125

Antonio Burgos-Núñez

引用次数: 0

El desmantelamiento de los viaductos del enlace de Sabino Arana en Bilbao 毕尔巴鄂萨比诺-阿拉纳连接线高架桥的拆除

IF 0.1

Hormigon y Acero Pub Date : 2023-05-23 DOI: 10.33586/hya.2023.3095

José Manuel Baraibar, P. Rivas

引用次数: 0

Estrategias de diseño para el cumplimiento de una resistencia al fuego R15 en estructuras industriales mediante el empleo del acero galvanizado 通过镀锌钢实现工业结构R15防火性能的设计策略

IF 0.1

Hormigon y Acero Pub Date : 2023-05-22 DOI: 10.33586/hya.2023.3101

Ana Espinós, Manolo Romero, Javier Tundidor

{"title":"Estrategias de diseño para el cumplimiento de una resistencia al fuego R15 en estructuras industriales mediante el empleo del acero galvanizado","authors":"Ana Espinós, Manolo Romero, Javier Tundidor","doi":"10.33586/hya.2023.3101","DOIUrl":"https://doi.org/10.33586/hya.2023.3101","url":null,"abstract":"La resistencia al fuego de la estructura portante es una de las exigencias básicas que ha de ser verificada en toda obra de construcción. Estudios recientes han demostrado una ligera ventaja del acero galvanizado frente al acero al carbono en cuanto a lo que a resistencia al fuego se refiere. Este comportamiento más favorable del acero galvanizado se debe a su menor emisividad a temperaturas por debajo de los 500 ºC, lo que permite dotar a la estructura de una mejora inherente en términos de resistencia al fuego en el rango entre 15 y 30 minutos. En España, este rango de tiempos requeridos puede encontrarse fácilmente dentro del ámbito de la edificación industrial. En estos casos, es posible cumplir las exigencias de resistencia al fuego utilizando el acero galvanizado, evitando de esta forma tener que proteger la estructura mediante materiales de protección pasiva. \u0000En este artículo se pretende acercar al proyectista al cálculo de la resistencia al fuego de elementos estructurales de acero galvanizado, a través de la presentación de un ejemplo de cálculo guiado donde se compararán los beneficios que aporta el acero galvanizado frente al acero al carbono en este tipo de situaciones.","PeriodicalId":41423,"journal":{"name":"Hormigon y Acero","volume":"1 1","pages":""},"PeriodicalIF":0.1,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69455108","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

Numerical Study of the Shear Behavior of Ultra-High-Performance Concrete Beams 超高性能混凝土梁抗剪性能数值研究

IF 0.1

Hormigon y Acero Pub Date : 2023-05-18 DOI: 10.33586/hya.2023.3119

Antonio Martínez-de-la-Concha, José D. Ríos, H. Cifuentes

引用次数: 0