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A consistent triangular thin flat shell finite element with drilling rotation based on the strain approach 基于应变法的具有钻孔旋转的一致三角形薄扁壳有限元
IF 1.3
International Journal of Structural Engineering Pub Date : 2018-08-01 DOI: 10.1504/ijstructe.2018.10014819
H. Guenfoud, Mohamed Himeur, H. Ziou, M. Guenfoud
{"title":"A consistent triangular thin flat shell finite element with drilling rotation based on the strain approach","authors":"H. Guenfoud, Mohamed Himeur, H. Ziou, M. Guenfoud","doi":"10.1504/ijstructe.2018.10014819","DOIUrl":"https://doi.org/10.1504/ijstructe.2018.10014819","url":null,"abstract":"The paper offers a new flat shell finite element. It results from the combination of a membrane and a bending elements, both founded on the strain based formulation. The used membrane element is the T43_Eq. It is a triangular element with four nodes, three nodes at the vertices and the fourth one at the barycenter. Each node has three degrees of freedom, two translations and one rotation around the normal. The coefficients related to the degrees of freedom at the internal node are subsequently removed from the element stiffness matrix by using the static condensation procedure. The interpolation functions of strain, displacements and stresses fields are developed from equilibrium conditions. Then, the plate element used for the construction of the shell element is a triangular four-node thin plate element based on: the deformation approach, the four fictitious node, the static condensation and the analytic integration. The shell element result of this combination is robust, competitive and efficient. The shell element result of this combination is robust, competitive and efficient.","PeriodicalId":38785,"journal":{"name":"International Journal of Structural Engineering","volume":"9 1","pages":"191"},"PeriodicalIF":1.3,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45687913","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: 2
Finite element analysis of confined high strength concrete bridge columns with opposing-spiral reinforcement 对向螺旋钢筋约束高强混凝土桥柱的有限元分析
IF 1.3
International Journal of Structural Engineering Pub Date : 2018-07-06 DOI: 10.1504/IJSTRUCTE.2018.10014090
Mohammed Al-Osta, S. Nasrin, A. Ibrahim, R. Hindi
{"title":"Finite element analysis of confined high strength concrete bridge columns with opposing-spiral reinforcement","authors":"Mohammed Al-Osta, S. Nasrin, A. Ibrahim, R. Hindi","doi":"10.1504/IJSTRUCTE.2018.10014090","DOIUrl":"https://doi.org/10.1504/IJSTRUCTE.2018.10014090","url":null,"abstract":"The spiral reinforcement is a very common technique used for reinforcing columns in active seismic regions due to its high ductility and high ability of energy absorption. This paper presents a nonlinear finite element analysis of high-strength concrete confined with opposing circular spiral reinforcements. The results are compared with tested scaled concrete columns made with opposing spirals under monotonic axial loads. The developed model is used to investigate the effect of spiral spacing, γ (ratio of the core diameter to the whole cross section diameter) and compressive strength on behaviour of circular spiral reinforced concrete column confined with opposing spiral reinforcements. The results of the parametric study demonstrated that for the same spacing between spirals and same strength of concrete, increasing γ will result into increasing the failure load of the column. It is also concluded that the ductility of the studied columns is not affected by changing the value of γ.","PeriodicalId":38785,"journal":{"name":"International Journal of Structural Engineering","volume":"9 1","pages":"101"},"PeriodicalIF":1.3,"publicationDate":"2018-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41480039","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
Characteristic of double bottom responses under powered-hard grounding scenario with idealised rock indenter 理想岩石压头通电硬接地双底响应特性
IF 1.3
International Journal of Structural Engineering Pub Date : 2018-07-06 DOI: 10.1504/IJSTRUCTE.2018.10014092
A. Prabowo, D. Bae, J. Cho, J. Sohn
{"title":"Characteristic of double bottom responses under powered-hard grounding scenario with idealised rock indenter","authors":"A. Prabowo, D. Bae, J. Cho, J. Sohn","doi":"10.1504/IJSTRUCTE.2018.10014092","DOIUrl":"https://doi.org/10.1504/IJSTRUCTE.2018.10014092","url":null,"abstract":"The grounding phenomenon included in a load-type accident has been classified as a top-two marine incident, particularly accounting for the oil spills that occur after it takes place. This study aims to present a numerical analysis for estimating ship responses under a hard grounding scenario. This analysis was validated through a pioneering penetration experiment that was re-calculated using the finite element method. In the grounding simulation, the sea floor rock was idealised as a conical indenter penetrating the ship structure. Crashworthiness criteria were considered as the structural response in this work. It was determined that the crushing of the centre girder opened tears in two of the double-bottom compartments. An estimation based on the indenter geometry showed that a steep angle of the conical indenter is capable of producing deeper damage and more visibly initial failures to the centre girder than a blunt indenter under a powered hard grounding scenario.","PeriodicalId":38785,"journal":{"name":"International Journal of Structural Engineering","volume":"9 1","pages":"130"},"PeriodicalIF":1.3,"publicationDate":"2018-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44940078","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: 4
Evaluation of response reduction factor by pushover analysis 用推覆分析评价响应减小系数
IF 1.3
International Journal of Structural Engineering Pub Date : 2018-07-06 DOI: 10.1504/IJSTRUCTE.2018.10014091
Ronak Motiani, J. Kunal, Shefali Gahrana, Anurag Nambiar, M. Desai
{"title":"Evaluation of response reduction factor by pushover analysis","authors":"Ronak Motiani, J. Kunal, Shefali Gahrana, Anurag Nambiar, M. Desai","doi":"10.1504/IJSTRUCTE.2018.10014091","DOIUrl":"https://doi.org/10.1504/IJSTRUCTE.2018.10014091","url":null,"abstract":"Estimation of seismic forces plays a vital role in the design of the structure and generally these forces are computed using the linear static method with aid of response reduction factor. Response reduction/modification factor (R) incorporates the nonlinear response of any structure during a seismic event, allowing the designer for a linear force based design while reckoning the nonlinear behaviour and deformation limits of the structure. This research focuses on estimation of the response modification factor for realistic RC moment frame buildings laid out as per norms mentioned in the Indian standard. The importance is given to computation of R at a rather component-wise level with the effects and consideration included by various analyses. The result shows that the value suggested by IS1893 focuses upon a general consideration for the value of R which actually shall vary with a storey height of the structure, thus the value of R being either underestimated or overestimated.","PeriodicalId":38785,"journal":{"name":"International Journal of Structural Engineering","volume":"9 1","pages":"116"},"PeriodicalIF":1.3,"publicationDate":"2018-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49134621","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: 1
A study on properties and effects of copper slag and marble dust in concrete 铜渣和大理石粉在混凝土中的性能及作用研究
IF 1.3
International Journal of Structural Engineering Pub Date : 2018-07-06 DOI: 10.1504/IJSTRUCTE.2018.10014089
M. Patil, Y. Patil, G. Vesmawala
{"title":"A study on properties and effects of copper slag and marble dust in concrete","authors":"M. Patil, Y. Patil, G. Vesmawala","doi":"10.1504/IJSTRUCTE.2018.10014089","DOIUrl":"https://doi.org/10.1504/IJSTRUCTE.2018.10014089","url":null,"abstract":"Marble dust is the by-product from marble cutting method. The aim of this paper is to seek out the possibility of using marble dust along with the copper slag as a partial replacement to fine aggregate in concrete. Marble dust was employed in mixes containing copper slag as partial substitute to sand in quantities starting from 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, and 50%. The hardened properties of concrete were checked for 7, 28, 56 and 112 days. Results show that up to 60% replacement of marble dust and copper slag to fine aggregate, there is an increase in compressive strength. Also, split tensile strength, flexure, density and modulus of elasticity show an increase in strength at 60% replacement. Permeability, on the other hand, goes on decreasing up to 60% replacement and increases beyond 60% replacement of marble dust and copper slag. These findings of the analysis state that marble dust will be used as the possible replacement material to sand to provide high strength copper slag concrete.","PeriodicalId":38785,"journal":{"name":"International Journal of Structural Engineering","volume":"9 1","pages":"91"},"PeriodicalIF":1.3,"publicationDate":"2018-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47684396","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: 2
Evaluation of steel special moment resisting frame structures with different spans and story numbers 不同跨度、不同层数的钢特抗弯矩框架结构评价
IF 1.3
International Journal of Structural Engineering Pub Date : 2018-07-06 DOI: 10.1504/IJSTRUCTE.2018.10014104
M. Babaei, Mohsen Jabbar
{"title":"Evaluation of steel special moment resisting frame structures with different spans and story numbers","authors":"M. Babaei, Mohsen Jabbar","doi":"10.1504/IJSTRUCTE.2018.10014104","DOIUrl":"https://doi.org/10.1504/IJSTRUCTE.2018.10014104","url":null,"abstract":"Optimal topology design of structures has always been a challenging issue for engineers and designers. Many of the studies on layout optimisation suggested unpractical or impossible designs from construction technology point of view. On the other hand, a good design has to satisfy not only structural but also architectural requirements, which provides cost-effective building with useful areas and spaces. In this article, performance of special steel moment resisting frames were evaluated in terms of the required materials and the architectural requirements using static analysis method. To obtain comparable results, a same plan was defined for models so that all architectural requirements for parking areas to be satisfied. Required materials and structural costs for building models with different layouts were obtained and compared. Results showed that moderate beams were almost the optimal design for mid structures, and when the story numbers increases, larger spans were required to provide optimal design.","PeriodicalId":38785,"journal":{"name":"International Journal of Structural Engineering","volume":"9 1","pages":"145"},"PeriodicalIF":1.3,"publicationDate":"2018-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47979365","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
Nonlinear system identification from noisy measurements 基于噪声测量的非线性系统辨识
IF 1.3
International Journal of Structural Engineering Pub Date : 2018-07-06 DOI: 10.1504/IJSTRUCTE.2018.093043
Abdul-Basset A. Al-Hussein, A. Haldar
{"title":"Nonlinear system identification from noisy measurements","authors":"Abdul-Basset A. Al-Hussein, A. Haldar","doi":"10.1504/IJSTRUCTE.2018.093043","DOIUrl":"https://doi.org/10.1504/IJSTRUCTE.2018.093043","url":null,"abstract":"A novel nonlinear system identification procedure using noisy measurements for health assessment of real civil infrastructure systems is presented. The important features of the procedure are that it can identify a structural system using only a limited number of highly noise-contaminated responses measured for a very short duration. To compensate for the use of very short duration response time-histories, multiple weighted global iteration (WGI) procedure is introduced in the unscented Kalman filter (UKF) algorithm to help the convergence process. It is denoted as UKF-WGI procedure. The algorithm is a finite element-based nonlinear system identification technique. It identifies not only the integrity of the whole structure, but also the locations and severity of the defects. Since no similar studies are reported in the literature, the superiority of UKF-WGI over the extended Kalman filter-based procedure in the presence of noise is established with the help of several illustrative examples.","PeriodicalId":38785,"journal":{"name":"International Journal of Structural Engineering","volume":"9 1","pages":"154-173"},"PeriodicalIF":1.3,"publicationDate":"2018-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJSTRUCTE.2018.093043","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48891011","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: 3
Damage evaluation in plates using modal data and firefly optimisation algorithm 基于模态数据和萤火虫优化算法的板损伤评估
IF 1.3
International Journal of Structural Engineering Pub Date : 2018-03-29 DOI: 10.1504/IJSTRUCTE.2018.10011861
N. Navabian, R. Taghipour, M. Bozorgnasab, J. Ghasemi
{"title":"Damage evaluation in plates using modal data and firefly optimisation algorithm","authors":"N. Navabian, R. Taghipour, M. Bozorgnasab, J. Ghasemi","doi":"10.1504/IJSTRUCTE.2018.10011861","DOIUrl":"https://doi.org/10.1504/IJSTRUCTE.2018.10011861","url":null,"abstract":"This paper presents a method to identify the location and severity of the damages in plates. The location of damage is detected using a new damage index (MDC), based on the mode shapes and their derivatives. The mode shapes are calculated via modal analysis and their derivatives are obtained through central finite difference approximation. The results are fed into the proposed damage index to find the location of damaged areas. Thereafter, the quantity of damage in the damaged area is assessed using firefly algorithm (FA). The capability of the proposed damage evaluation procedure is shown through some examples. According to the results, the newly proposed index is capable of finding the damage locations with acceptable accuracy. In addition, FA can assess the damage severities in the damaged zones with an error less than 2%. The proposed approach has the ability to identify the damages even for noisy polluted data.","PeriodicalId":38785,"journal":{"name":"International Journal of Structural Engineering","volume":"9 1","pages":"50"},"PeriodicalIF":1.3,"publicationDate":"2018-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45969103","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: 1
Topology optimisation of the discrete structures with the minimum growing ground structure method 基于最小生长地面结构法的离散结构拓扑优化
IF 1.3
International Journal of Structural Engineering Pub Date : 2018-03-29 DOI: 10.1504/IJSTRUCTE.2018.10011860
A. Ghoddosian, Mojtaba Riyahi Vezvari, M. S. Azqandi, Mohammad Amin Karimi
{"title":"Topology optimisation of the discrete structures with the minimum growing ground structure method","authors":"A. Ghoddosian, Mojtaba Riyahi Vezvari, M. S. Azqandi, Mohammad Amin Karimi","doi":"10.1504/IJSTRUCTE.2018.10011860","DOIUrl":"https://doi.org/10.1504/IJSTRUCTE.2018.10011860","url":null,"abstract":"In previous works in the field of topology optimisation of discrete structures, the starting point of the algorithm in the most cases is a structure that consists of all members (ground structure). In this case, too much computing is needed to obtain optimum topology of the structure. In order to overcome this disadvantage of the structural topology optimisation, the minimum growing ground structure method (MGGSM) was proposed. The method consists of three phases. In the first phase, the minimum stable structure is constructed. In the second phase, this structure, by applying the growth idea becomes a feasible and acceptable structure, and in the third phase, a meta-heuristic optimisation method is used to obtain the optimal topology of the structure. The comparison between the results obtained by the MGGSM and other methods for standard examples shows the efficiency of the MGGSM algorithm to obtain the optimum state.","PeriodicalId":38785,"journal":{"name":"International Journal of Structural Engineering","volume":"9 1","pages":"38"},"PeriodicalIF":1.3,"publicationDate":"2018-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42999946","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: 2
Assessment of welded splices in beam, column and slab 梁、柱、板焊接接头的评定
IF 1.3
International Journal of Structural Engineering Pub Date : 2018-03-29 DOI: 10.1504/IJSTRUCTE.2018.10011859
H. Mahzuz, M. Islam, Saikat Ahmed, Md. Abu Jobair
{"title":"Assessment of welded splices in beam, column and slab","authors":"H. Mahzuz, M. Islam, Saikat Ahmed, Md. Abu Jobair","doi":"10.1504/IJSTRUCTE.2018.10011859","DOIUrl":"https://doi.org/10.1504/IJSTRUCTE.2018.10011859","url":null,"abstract":"In this study, the performance of welded splices in RCC member is judged with respect to lapped splices having straight bars. The objective of this experiment is to find out a safe weld length for welded splices which can be used in beam, column and slab. For that, 12 mm, 16 mm and 20 mm (fy = 500 MPa and weldable) rebars were used, having an electrode of E60Ksi. Selected bars were welded together with different welding lengths ranging between 25 to 150 mm and conducted tension and bending tests on them. It was found that 100 mm welding was adequate for all bars. So, this length was considered the safe weld length for welded splices. Specimens of beam, column and slab were prepared and tested with welded splices and straight bars. The effects of load on beam, column and slab for both types of bars were observed and found almost same when 100mm welded splices are used.","PeriodicalId":38785,"journal":{"name":"International Journal of Structural Engineering","volume":"9 1","pages":"26"},"PeriodicalIF":1.3,"publicationDate":"2018-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41457115","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
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