Latin American Journal of Solids and Structures最新文献_第10页

Flexural Behavior Analysis and Design Approach for R.C. Beams by Hybrid Reinforcement of Steel Rebars and HDPE Uniaxial Geogrids 钢筋与HDPE单轴土工格栅复合加固钢筋混凝土梁的受弯性能分析与设计方法

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2021-03-16 DOI: 10.1590/1679-78256472

R. Mohamed, A.M. El Sebai, A. Gabr

{"title":"Flexural Behavior Analysis and Design Approach for R.C. Beams by Hybrid Reinforcement of Steel Rebars and HDPE Uniaxial Geogrids","authors":"R. Mohamed, A.M. El Sebai, A. Gabr","doi":"10.1590/1679-78256472","DOIUrl":"https://doi.org/10.1590/1679-78256472","url":null,"abstract":"THE OBJECTIVE OF THIS STUDY IS TO INVESTIGATE A HYBRID REINFORCEMENT METHOD FOR CONCRETE BEAMS, WHICH CONSISTS OF STEEL REBARS AND HDPE UNIAXIAL GEOGRIDS, BY DEVELOPING AN EXPERIMENTAL COMPARATIVE INVESTIGATION BETWEEN UTILIZING DIFFERENT GRADES AND LAYERS OF HDPE UNIAXIAL GEOGRIDS AS THE PRIMARY REINFORCEMENT OR AS EXTRA REINFORCEMENT TO THE STEEL REBARS. THE EXPERIMENTS FOR THIS INVESTIGATION INCLUDED 24 REINFORCED CONCRETE BEAMS IN ORDER TO PROVIDE RICH DATA FOR THE FLEXURAL BEHAVIOR ANALYSIS AND DESIGN APPROACH. FOR A DETAILED ANALYSIS, STRAIN GAUGES WERE CONNECTED TO STEEL REBARS AND HDPE UNIAXIAL GEOGRIDS. ANALYSIS OF THE RESULTS SHOWS THAT THE HYBRID REINFORCEMENT METHOD USING STEEL REBARS AND HDPE UNIAXIAL GEOGRIDS PROVIDED GREATER BENEFITS (SUCH AS ENERGY ABSORPTION CAPACITY, DUCTILITY INDEX, ULTIMATE LOAD, AND STEEL-YIELD LOAD) AND MORE EFFECTIVE UTILIZATION (SUCH AS BETTER FLEXURAL PERFORMANCE, LOWER DEFORMATION VALUES CORRESPONDING TO THE STEEL-YIELD LOAD, AND GREATER BENEFITS TO COST RATIOS) THAN UTILIZING HDPE UNIAXIAL GEOGRIDS AS THE PRIMARY REINFORCEMENT OR UTILIZING THE CONVENTIONAL REINFORCEMENT OF STEEL REBARS. SIMPLE DESIGN EQUATIONS WERE USED TO CALCULATE THE FLEXURAL BENDING CAPACITY, THE NECESSARY HDPE UNIAXIAL GEOGRIDS’ GRADE, AND THE NUMBER OF LAYERS UTILIZING THE HDPE UNIAXIAL GEOGRIDS AS THE PRIMARY REINFORCEMENT OR AS EXTRA REINFORCEMENT TO THE STEEL REBARS.","PeriodicalId":18192,"journal":{"name":"Latin American Journal of Solids and Structures","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2021-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46013177","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

A critical assessment of two-stage composite time integration schemes with a unified set of time approximations 具有统一时间近似集的两阶段复合时间积分方案的临界评估

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2021-03-08 DOI: 10.1590/1679-78256470

Wooram Kim, J. Reddy

引用次数: 3

Response of a Double Hypar Fabric Structure Under Varying Wind Speed Using Fluid-Structure Interaction 基于流固耦合的双超纤织物结构在变风速下的响应

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2021-03-03 DOI: 10.1590/1679-78256367

J. Valdés-Vázquez, A. García-Soto, M. Chiumenti

{"title":"Response of a Double Hypar Fabric Structure Under Varying Wind Speed Using Fluid-Structure Interaction","authors":"J. Valdés-Vázquez, A. García-Soto, M. Chiumenti","doi":"10.1590/1679-78256367","DOIUrl":"https://doi.org/10.1590/1679-78256367","url":null,"abstract":"WIND EFFECTS ON TENSILE FABRIC STRUCTURES (TFS) ARE NOT EXTENSIVELY INVESTIGATED. AVAILABLE STUDIES IN THE LITERATURE CONSIDER SIMPLIFIED TFS SUPPORT CONDITIONS. COMPARISONS BETWEEN STATIC AND DYNAMIC ANALYSES ARE LACKING. THE RESPONSE OF A DOUBLE HYPAR TFS UNDER VARYING WIND SPEED IS CARRIED OUT BY USING FLUID-STRUCTURE INTERACTION (FSI). REALISTIC SUPPORT CONDITIONS ARE CONSIDERED. THE DOUBLE HYPAR GEOMETRY IS DETERMINED THROUGH FORM-FINDING. COMPUTATIONAL FLUID DYNAMICS (CFD) IS THE BASIS TO PERFORM DYNAMIC ANALYSIS TO PROPOSE PRESSURE COEFFICIENTS USEFUL FOR DESIGN. DIFFERENCES BETWEEN DYNAMIC AND STATIC ANALYSES ARE ASSESSED. IT IS FOUND THAT THE STRESSES IN THE FABRIC AND AXIAL FORCES IN THE SUPPORTS ARE SIGNIFICANTLY DIFFERENT FOR EACH TYPE OF ANALYSIS, WHICH CANNOT BE CAPTURED BY SIMPLIFIED UNIFORM UPLIFT WIND AND SNOW LOADINGS. STATIC ANALYSIS USING PRESSURE COEFFICIENTS LEADS TO DIFFERENCES OF UP TO 17.3% FOR STRESSES IN THE FABRIC, 10.5% FOR THE COMPRESSIVE FORCE IN THE MASTS AND 33.5% FOR THE TENSILE FORCE IN THE CABLES, COMPARED TO A FSI ANALYSIS. RESULTS GIVE FURTHER INSIGHT INTO THE WIND RESPONSE OF REALISTIC TFSS.","PeriodicalId":18192,"journal":{"name":"Latin American Journal of Solids and Structures","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2021-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44775430","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

Numerical Study on Dynamic Performance of End-anchored Rockbolt under Impact Loading 冲击载荷作用下端锚锚杆动力性能的数值研究

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2021-03-02 DOI: 10.1590/1679-78256458

Chen Zhao, Yubao Zhang, Wenbin Wu, Zijian Zhang, T. Zhao

{"title":"Numerical Study on Dynamic Performance of End-anchored Rockbolt under Impact Loading","authors":"Chen Zhao, Yubao Zhang, Wenbin Wu, Zijian Zhang, T. Zhao","doi":"10.1590/1679-78256458","DOIUrl":"https://doi.org/10.1590/1679-78256458","url":null,"abstract":"Abstract The numerical modelling for dynamic impact testing of end-anchored rockbolt is established in this paper. The dynamic response of rockbolt under impact loading condition is investigated considering the effects of different impact energy levels, anchoring length, bolt diameter, and material type. The results show that the stress characteristics of the anchoring section in end-anchored rockbolt could be divided into three stages with the impact time: impact initial stage, impact middle stage and impact final stage. The elongation of the rockbolt increases by about 30 mm for every 5kJ increase in impact energy. When the impact energy level increases, the energy absorption rate and maximum plastic strain both increase significantly. The impact energy is mainly dissipated by the plastic deformation of the free section and debonding section of end-anchored rockbolt. The free section plays a buffer role through its elastic deformation when the rockbolt is subjected to impact loading. It is remarkable that the energy absorption rate and anti-impact performance of the end-anchored rockbolt can be improved by increasing the bolt diameter and the bolt material strength.","PeriodicalId":18192,"journal":{"name":"Latin American Journal of Solids and Structures","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2021-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45562107","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: 3

Tribological and Mechanical Properties of Epoxy Reinforced by Hybrid Nanoparticles 杂化纳米颗粒增强环氧树脂的摩擦学和力学性能

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2021-02-24 DOI: 10.1590/1679-78256384

W. Alhazmi, Y. Jazaa, S. Mousa, A. Abd-Elhady, H. Sallam

引用次数: 16

Influence of Trapezoidal Shapes and Cutout Sizes on the Buckling Behaviour of Composite Laminates Under Thermally Induced Loads 梯形形状和切口尺寸对复合材料层压板热致屈曲性能的影响

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2021-02-22 DOI: 10.1590/1679-78256331

Maharudra, T. Rajanna, B. Arya

{"title":"Influence of Trapezoidal Shapes and Cutout Sizes on the Buckling Behaviour of Composite Laminates Under Thermally Induced Loads","authors":"Maharudra, T. Rajanna, B. Arya","doi":"10.1590/1679-78256331","DOIUrl":"https://doi.org/10.1590/1679-78256331","url":null,"abstract":"TRAPEZOIDAL LAMINATED PLATES WITH CUTOUTS ARE COMMONLY FOUND IN MANY ENGINEERING FIELD, ESPECIALLY IN AEROSPACE STRUCTURES. IN MANY CASES THESE PLATES ARE SUBJECTED TO VARIOUS HARSH ENVIRONMENTAL CONDITIONS DURING ITS SERVICE LIFE. THERMALLY INDUCED LOAD IS THE ONE WHICH SERIOUSLY AFFECT THE BUCKLING CHARACTERISTICS OF THE STRUCTURAL COMPONENTS. THE STUDY PRESENTS THE EFFECT OF RISE IN TEMPERATURE ON THE THERMAL BUCKLING CHARACTERISTICS OF TRAPEZOIDAL LAMINATED COMPOSITE PLATES WITH AND WITHOUT CUTOUTS BY USING FINITE ELEMENT TECHNIQUE. IN ORDER TO MODEL THE PLATE, A 9-NODED HETEROSIS PLATE ELEMENT HAS BEEN USED BY INCORPORATING THE EFFECT OF SHEAR DEFORMATION. BY CORRELATING PRESENT FINDINGS WITH THE AVAILABLE LITERATURE, THE EFFECTIVENESS OF THE PRESENT FORMULATION IS VERIFIED. FOR A GIVEN TRAPEZOIDAL SHAPE AND CUTOUT SIZE, THE THERMAL STRESS DISTRIBUTION WITHIN THE PLATE IS HIGHLY NON-UNIFORM IN NATURE, THUS TWO TYPES OF BOUNDARY CONDITIONS HAVE BEEN USED. ONE IS FOR INITIAL STRESS CALCULATIONS AND OTHER ONE FOR THERMAL BUCKLING CALCULATIONS. THE PRESENT STUDY MAINLY DEALS WITH THE EFFECT OF THE VARIOUS CUTOUT SIZES AND THE TRAPEZOIDAL SHAPES UNDER THERMALLY INDUCED LOADS. THE COMPUTER PROGRAM BY USING FORTRAN LANGUAGE HAS BEEN DEVELOPED TO INVESTIGATE THE EFFECT OF DIFFERENT PARAMETERS SUCH AS TRAPEZOIDAL SHAPES, CUTOUT OFFSETS, PLATE ASPECT RATIO, PLY-ORIENTATIONS, DIFFERENT THICKNESS AND PLATE EDGECONDITIONS. THE INFLUENCE OF EACH PARAMETER ON THE THERMAL BUCKLING BEHAVIOR IS WELL INVESTIGATED THROUGH THIS WORK.","PeriodicalId":18192,"journal":{"name":"Latin American Journal of Solids and Structures","volume":" 62","pages":""},"PeriodicalIF":1.2,"publicationDate":"2021-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41255300","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: 5

Dynamic structure-soil-structure interaction of piled high-rise buildings under earthquake excitations II: Influence of key parameter 地震作用下桩基高层建筑结构-土-结构动力相互作用ⅱ:关键参数的影响

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2021-02-22 DOI: 10.1590/1679-78256224

Huai-feng Wang, Ru-lin Zhang

{"title":"Dynamic structure-soil-structure interaction of piled high-rise buildings under earthquake excitations II: Influence of key parameter","authors":"Huai-feng Wang, Ru-lin Zhang","doi":"10.1590/1679-78256224","DOIUrl":"https://doi.org/10.1590/1679-78256224","url":null,"abstract":"Abstract A numerical study is performed on the structure-soil-structure interaction (SSSI) between high-rise buildings. ANSYS has been further developed for calculation in the frequency domain, in which hysteretic damping can be considered for both soil and structures. This study is presented in two subsequent papers. The first part[1] focuses on the influence of the SSSI on each kind of dynamic response, while the second part, i.e., this paper, is a parameter study that focuses on the influence of each key parameter, including the separation distance between structures; the damping ratio, thickness and shear wave velocity of the soil; the length of the pile; the damping ratio, style, material stiffness, mass and story number of the superstructure; and the position and number of the structure, on the SSSI. The interaction decreases with the increase in the separation distance between structures, the increase in the damping ratio and shear wave velocity of the soil, the increase in the damping ratio and mass of the superstructure, or the decrease in the material stiffness of the superstructure in a fluctuating manner.","PeriodicalId":18192,"journal":{"name":"Latin American Journal of Solids and Structures","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2021-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48657513","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: 3

Dynamic structure-soil-structure interaction of piled high-rise buildings under earthquake excitations I: Influence on dynamic response 地震作用下高层建筑桩-土-结构动力相互作用研究Ⅰ：对动力响应的影响

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2021-02-17 DOI: 10.1590/1679-78256223

Huai-feng Wang, Ru-lin Zhang

{"title":"Dynamic structure-soil-structure interaction of piled high-rise buildings under earthquake excitations I: Influence on dynamic response","authors":"Huai-feng Wang, Ru-lin Zhang","doi":"10.1590/1679-78256223","DOIUrl":"https://doi.org/10.1590/1679-78256223","url":null,"abstract":"Abstract The structure-soil-structure interaction (SSSI) between high-rise buildings is numerically investigated. ANSYS has been further developed for calculation in the frequency domain, in which hysteretic damping can be considered for both the soil and structure. This study is presented in two subsequent papers. In the first part, i.e., this paper, the variations in the story shear force, interstory drift angle, displacement, velocity and acceleration of the superstructure, the sway of the foundation, and the axial and shearing forces of the pile are presented. The major influencing factors are the excitation frequency of a harmonic wave or the frequency components of a seismic wave, shaking direction of an exciting wave and direction of the structure arrangement. Under harmonic waves, the interaction mainly occurs when the excitation frequency is 1-5 Hz. Under seismic waves, when the shaking direction of an exciting wave is perpendicular to the direction of the structure arrangement and the direction of the structure arrangement is parallel to the lateral axis of the structure, the influence on the superstructure is greatest.","PeriodicalId":18192,"journal":{"name":"Latin American Journal of Solids and Structures","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2021-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43753935","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

Epistemic Uncertainty Treatment Using Group Method of Data Handling Algorithm in Seismic Collapse Fragility 地震崩塌脆弱性数据处理算法的群法认知不确定性处理

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2021-02-08 DOI: 10.1590/1679-78256254

Fooad Karimi Ghaleh Jough, Meisam Veghar, S. Beheshti-Aval

{"title":"Epistemic Uncertainty Treatment Using Group Method of Data Handling Algorithm in Seismic Collapse Fragility","authors":"Fooad Karimi Ghaleh Jough, Meisam Veghar, S. Beheshti-Aval","doi":"10.1590/1679-78256254","DOIUrl":"https://doi.org/10.1590/1679-78256254","url":null,"abstract":"DEVELOPING FRAGILITY FUNCTIONS IS THE ESSENTIAL STEP IN INCORPORATING IMPORTANT UNCERTAINTIES IN NEXT-GENERATION PERFORMANCE-BASED EARTHQUAKE ENGINEERING (PBEE) METHODOLOGY. THE PRESENT PAPER IS AIMED TO INVOLVE RECORD-TO-RECORD VARIABILITY AS WELL AS MODELLING UNCERTAINTY SOURCES IN DEVELOPING THE FRAGILITY CURVES AT COLLAPSE LIMIT STATE. IN THIS ARTICLE, IN ORDER TO REDUCE THE DISPERSION OF UNCERTAINTIES, GROUP METHOD OF DATA HANDLING (GMDH) IN COMBINATION WITH MONTE CARLO SIMULATION (MCS) USED TO DEVELOP STRUCTURAL COLLAPSE FRAGILITY CURVE, CONSIDERING EFFECTS OF EPISTEMIC AND ALEATORY UNCERTAINTIES. A STEEL MOMENT RESISTING FRAME (SMRF) IS CHOSEN AS THE TESTED STRUCTURE.N THE FRAGILITY CURVES OBTAINED BY THE PROPOSED METHOD WHICH IS BELONG TO GMDH APPROACHES ARE COMPARED WITH THOSE RESULTED FROM SIMPLE AND WELL-KNOWN AVAILABLE METHODS SUCH AS FIRST-ORDER SECOND-MOMENT (FOSM), APPROXIMATE SECOND-ORDER SECOND-MOMENT (ASOSM) AND MONTE CARLO (MC)/RESPONSE SURFACE METHOD (RSM), SOMEHOW, AS AN ACCURATE METHOD. THE RESULTS OF THE APPLICATION OF THE PROPOSED APPROACH INDICATE INCREASING ACCURACY AND PRECISION OF THE OUTPUTS AS WELL AS POWER WITH THE SAME COMPUTATIONAL TIME COMPARED TO AFOREMENTIONED METHODS. THE GMDH METHOD INTRODUCED HERE CAN BE APPLIED TO THE OTHER PERFORMANCE LEVELS.","PeriodicalId":18192,"journal":{"name":"Latin American Journal of Solids and Structures","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2021-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42871855","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

Behavior of Auxetic Steel Wire RC Columns Exposed to Elevated Temperature 钢筋混凝土柱在高温下的性能

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2021-02-05 DOI: 10.1590/1679-78256422

R. Al-Rousan

引用次数: 4