Latin American Journal of Solids and Structures最新文献_第5页

Seismic fragility assessment of typical bridges in Northeastern Brazil 巴西东北部典型桥梁地震易损性评价

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2022-01-01 DOI: 10.1590/1679-78257062

G. H. Cavalcante, E. Pereira, I. D. Rodrigues, Luiz Carlos Marcos Vieira Júnior, J. Padgett, G. Siqueira

引用次数: 1

Comparison between recent implicit time integration methods with frequency dissipation for nonlinear structural applications 非线性结构的频率耗散隐式时间积分方法的比较

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2022-01-01 DOI: 10.1590/1679-78256973

W. L. Fernandes, Gustavo Botelho Barbosa, M. Greco, R. Silveira

{"title":"Comparison between recent implicit time integration methods with frequency dissipation for nonlinear structural applications","authors":"W. L. Fernandes, Gustavo Botelho Barbosa, M. Greco, R. Silveira","doi":"10.1590/1679-78256973","DOIUrl":"https://doi.org/10.1590/1679-78256973","url":null,"abstract":"The present paper aims to test recent (Truly self-starting two sub-step method and three-parameter single-step implicit method) and classical (Generalized-α, HHT - α, and WBZ - α methods) time integration methods using the geometrically nonlinear Positional Finite Element Method (PFEM). The numerical formulation is based on the total Lagrangian approach and uses the Hessian matrix to obtain the response. The mixed hardening inelastic model applied to PFEM is also presented. Two examples validate the time integration algorithms and the inelastic model. In the first example, the mixed hardening inelastic model is compared with the the bilinear stress-strain model and the elastic-perfectly plastic hinge model, and aspects such as amplitude decay and period elongation are discussed. In the second example, the implemented algorithms are verified in a severe geometrically nonlinear example, considering the influence of numerical dissipation, time interval, and the number of elements in the response. Results show the relevance of numerical damping for numerical stabilization and the good performance of the Generalized-α algorithm.","PeriodicalId":18192,"journal":{"name":"Latin American Journal of Solids and Structures","volume":"71 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67619839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

ERRATUM: Numerical evaluation of the seismic performance of thin reinforced concrete wall buildings representative of the industrialized building system 勘误:工业化建筑体系中具有代表性的薄钢筋混凝土墙体建筑抗震性能的数值评价

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2022-01-01 DOI: 10.1590/1679-78257045

引用次数: 0

Numerical Analysis of the Seismic Performance of Rigid Beam-To-Column Moment Connections Equipped with Steel Slit Damper (SSD) 安装钢缝阻尼器(SSD)的梁柱刚性弯矩连接抗震性能数值分析

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2022-01-01 DOI: 10.1590/1679-78256994

M. Hosseini, Liao Haitao, I. Corbi, O. Corbi

引用次数: 1

Mechanical Property Test and Damage Evaluation Analysis of Steel Fiber Stainless-Steel Reinforced Concrete Beams (SFSRCBs) under Impact Load 冲击荷载作用下钢纤维不锈钢混凝土梁力学性能试验及损伤评价分析

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2022-01-01 DOI: 10.1590/1679-78257131

Xiwu Zhou, Bo Wang, Xiaolu Deng, Jingdong Liu, Wen Zhang

{"title":"Mechanical Property Test and Damage Evaluation Analysis of Steel Fiber Stainless-Steel Reinforced Concrete Beams (SFSRCBs) under Impact Load","authors":"Xiwu Zhou, Bo Wang, Xiaolu Deng, Jingdong Liu, Wen Zhang","doi":"10.1590/1679-78257131","DOIUrl":"https://doi.org/10.1590/1679-78257131","url":null,"abstract":"In this paper, the ultra-high drop hammer impact test system is adopted for the vertical impact experiment on six SFSRCBs with steel fiber volume fraction of 2.0% and build the relevant numerical model. The research variables mainly include impact energy, impact mass and cumulative impact mode. The results show that, under a single equal energy impact, with the increase of the impact speed, the crack distribution of the specimen gradually tends to the mid-span local position. Compared with the impact mass, the impact speed has a greater effect on the failure mode, deformation resistance and deformation recovery ability of SFSRCBs. When the total cumulative impact energy is the same as the single impact energy, then the overall damage of the specimen caused by high-mass low-velocity cumulative impact is less significant than that caused by low-mass high-velocity cumulative impact. Combined with the finite element analysis, the calculation formula of the maximum deflection of SFSRCB under impact load is obtained. Finally, the calculation method of the impact damage evaluation factor of SFSRCBs is proposed.","PeriodicalId":18192,"journal":{"name":"Latin American Journal of Solids and Structures","volume":"13 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67620659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Damage Evaluation of Reinforced Concrete structures at lap splices of tensional steel bars using Bonded Piezoelectric Transducers 基于粘结式压电传感器的钢筋混凝土结构受拉钢筋搭接损伤评估

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2022-01-01 DOI: 10.1590/1679-78257069

R. Regupathi, C. Jayaguru

{"title":"Damage Evaluation of Reinforced Concrete structures at lap splices of tensional steel bars using Bonded Piezoelectric Transducers","authors":"R. Regupathi, C. Jayaguru","doi":"10.1590/1679-78257069","DOIUrl":"https://doi.org/10.1590/1679-78257069","url":null,"abstract":"Using bonded piezoelectric transducers (PZT), this study evaluates damage to reinforced concrete beams at lap splices of tensile rebars. Four reinforced concrete beams with a span of 2700mm and a cross-section of 200 x 250mm were cast and simply edge-supported on roller supports 2250mm apart. In the zone of constant moment, the tensile reinforcements of the beams were spliced with varying lap lengths (10 ϕ , 20 ϕ , 30 ϕ and 40 ϕ ). Two PZT patches (one to operate as an actuator and the other as a receiver) were bonded on steel rebars and placed 50mm apart from their lapping edges. The wave propagation technique was used to record the signals experimentally, and the signals were processed further using wavelet packet analysis. By setting the time lag results of waves under pulse excitation, the damage of beams were identified. Damage indices were calculated based on the wavelet packet energy to ascertain the damage levels. The PZT was very sensitive to detect the pull-out bond failure and ductile flexural failure at the lap slices of steel rebars in the beam and it gives an advance indication before the structural collapse due to brittle failure.","PeriodicalId":18192,"journal":{"name":"Latin American Journal of Solids and Structures","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67620323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Nonlinear Dynamic Analysis of Plates Subjected to Explosive Loads 爆炸载荷作用下板的非线性动力分析

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2022-01-01 DOI: 10.1590/1679-78256706

Ana Waldila de Queiroz Ramiro Reis, R. Burgos, Maria Fernanda Figueiredo de Oliveira

{"title":"Nonlinear Dynamic Analysis of Plates Subjected to Explosive Loads","authors":"Ana Waldila de Queiroz Ramiro Reis, R. Burgos, Maria Fernanda Figueiredo de Oliveira","doi":"10.1590/1679-78256706","DOIUrl":"https://doi.org/10.1590/1679-78256706","url":null,"abstract":"Blast loads have been increasingly studied in the past decades, especially regarding civil structures. Until recently, the negative phase of these loads has been disregarded, but studies concluded that the effect of suction must be included. In the case of plates, nonlinearity plays an important role, and the membrane effect should also be considered. This work focuses on the influence of nonlinearity in plates subjected to blast loads. Equations were developed for the calculation of blast load parameters, considering that positive and negative phases are approximated by the Friedlander equation and cubic polynomial, respectively. The plate is modeled as a SDOF system using von Karman's theory of large displacements. The development of the nonlinear dynamic differential equation is reviewed, considering a simply supported plate, and its solution is based on fourth order Runge-Kutta numerical method. A reference example is used as a benchmark and then parametric studies are conducted, in which the influence of scaled distance, mass of explosive, and the consideration or not of the negative phase is analyzed.","PeriodicalId":18192,"journal":{"name":"Latin American Journal of Solids and Structures","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67619105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Experimental study on fatigue properties of Q420C steel welded joints at room temperature Q420C钢焊接接头室温疲劳性能试验研究

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2022-01-01 DOI: 10.1590/1679-78256808

Liguo Yang, Y. Xing

引用次数: 1

Ultimate Bending Strength Evaluation of MVFT Composite Girder by using Finite Element Method and Machine Learning Regressors 基于有限元法和机器学习回归的MVFT组合梁极限抗弯强度评估

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2022-01-01 DOI: 10.1590/1679-78257006

Z. Xiong, Jiawen Li, Hou Zhu, Xuyao Liu, Zhuoxi Liang

{"title":"Ultimate Bending Strength Evaluation of MVFT Composite Girder by using Finite Element Method and Machine Learning Regressors","authors":"Z. Xiong, Jiawen Li, Hou Zhu, Xuyao Liu, Zhuoxi Liang","doi":"10.1590/1679-78257006","DOIUrl":"https://doi.org/10.1590/1679-78257006","url":null,"abstract":"This paper has evaluated the bending performance of a novel prefabricated MVFT steel-concrete composite girder. 9 meters pilot MVFT girder was analyzed by validated finite element model. In the pilot test, the height of web, the length of grouted concrete in the girder and net spacing between webs were parametrically modeled to discuss their effect to the bending strength. An ultimate bending strength formula has been obtained, which was based on the regression of parametric results. In the meantime, the two Machine Learning (ML) models, BP neural network and Least Squares Support Vector Machine, have been also implemented to train and then predict the ultimate strength of MVFT girder. Three factors were selected as input in ML models: the distance between steel girder’s Tensile Centroid(TC) and slab’s Compressive Centroid(CC), the distance between steel girder’s TC and its CC, the compressive area of steel girder. After the completion of the ML training, the ultimate strength predictions of 30 meters MVFT girder by BP model and the formula have been compared, which agrees well with each other and validates their accuracy.","PeriodicalId":18192,"journal":{"name":"Latin American Journal of Solids and Structures","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67619733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Effects of Non-Structural Walls on Mitigating the Risk of Progressive Collapse of RC Structures 非结构墙对减轻钢筋混凝土结构逐渐倒塌风险的影响

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2022-01-01 DOI: 10.1590/1679-78257023

A. Altheeb, Ibrahim M. H. Alshaikh, A. Abadel, M. Nehdi, Hussam Alghamdi

引用次数: 13