Latin American Journal of Solids and Structures最新文献_第7页

Nonlinear Numerical Evaluation of Dry Precast Beam Column Connection with Embedded Bolts 预埋螺栓干预制梁柱连接的非线性数值计算

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2022-01-01 DOI: 10.1590/1679-78257314

Srikanth Kallam, S. B. Borghate

引用次数: 1

Study on the penetration of elliptical cross-section projectiles into concrete targets: theory and experiment 椭圆截面弹丸侵彻混凝土靶的理论与实验研究

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2022-01-01 DOI: 10.1590/1679-78256939

Junwei Liu, Xianfeng Zhang, Haiyang Wei, Chuang Liu

{"title":"Study on the penetration of elliptical cross-section projectiles into concrete targets: theory and experiment","authors":"Junwei Liu, Xianfeng Zhang, Haiyang Wei, Chuang Liu","doi":"10.1590/1679-78256939","DOIUrl":"https://doi.org/10.1590/1679-78256939","url":null,"abstract":"To better understand the penetration mechanism of the elliptical cross-section projectile (ECSP) into semi-infinite concrete target, penetration experiments using three types of ECSPs with different shape ratios (1, 1.25 and 1.61) and with striking velocities ranged from 550 m/s to 1050 m/s were conducted. Penetration depths, penetration trajectory and mass erosion rates of the projectile were obtained after the experiments. The experiment results show that the penetration performance and ballistic stability of the ECSP are equivalent to those of the circular cross-section projectile (CCSP). Based on the theory of complex variable function and conformal transformation, a semi-analytical model which can calculate the cavity boundary stress distribution of elliptical section cavity controlled by the displacement boundary condition was established and the model was validated by comparing the model degenerate solution with Kirsch problem results. Theoretical calculation results show that the radial stress of elliptical section cavity increases progressively from the minor axis to the major axis. In addition, a formula combining with the semi-analytical theoretical model and the local interaction theory was developed. The predicted penetration depths were compared with 30 groups of experiment data with different projectile parameters and striking velocities and coincide quite well with the corresponding experimental data. Finally, the influence of shape ratio and caliber-radius-head (CRH) on the penetration performance of projectile and the application prospect of ECSPs on hypersonic weapon platform were studied.","PeriodicalId":18192,"journal":{"name":"Latin American Journal of Solids and Structures","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67619762","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

Long-term deformation assessment of a long-span concrete bridge built by the cantilever erection method 某大跨度悬臂架设混凝土桥梁的长期变形评估

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2022-01-01 DOI: 10.1590/1679-78257102

L. F. Rincón, Á. Viviescas, E. Osorio, C. A. Riveros-Jerez, J. Lozano-Galant

{"title":"Long-term deformation assessment of a long-span concrete bridge built by the cantilever erection method","authors":"L. F. Rincón, Á. Viviescas, E. Osorio, C. A. Riveros-Jerez, J. Lozano-Galant","doi":"10.1590/1679-78257102","DOIUrl":"https://doi.org/10.1590/1679-78257102","url":null,"abstract":"The balanced cast-in-place cantilever erection method has become a popular construction bridge technique. The main advantages include an industrialized erection technique that prevents the use of intermediate supports and rapid construction. However, the long-term response of this bridge typology is not well understood as long-term deflections due to time-dependent phenomena (such as creep and shrinkage) are significantly simplified in bridge design codes. Existing prediction models commonly used in design tend to underestimate long-term deflections, and as a result, field measurements conducted in newly constructed bridges still report excessive long-term deflections. This paper shows the long-term deflection analysis of a long-span concrete bridge located in Colombia and opened to traffic in 2014. This study is conducted using field data collected within a one-year time interval and modelling results. Further comparisons using field data collected from bridges with similar structural configurations, but opened to traffic in the 90s and 2000s, show that the bridge's current situation is categorized as a major concern.","PeriodicalId":18192,"journal":{"name":"Latin American Journal of Solids and Structures","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67620237","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

An efficient finite element model for dynamic analysis of gravity dam-reservoir-foundation interaction problems 重力坝-水库-地基相互作用动力分析的有效有限元模型

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2022-01-01 DOI: 10.1590/1679-78257178

Ahmad Yamin Rasa, A. Budak, Oğuz Akın Düzgün

{"title":"An efficient finite element model for dynamic analysis of gravity dam-reservoir-foundation interaction problems","authors":"Ahmad Yamin Rasa, A. Budak, Oğuz Akın Düzgün","doi":"10.1590/1679-78257178","DOIUrl":"https://doi.org/10.1590/1679-78257178","url":null,"abstract":"In this paper, a finite element (FE)-based model that efficiently evaluates the dynamic behavior of dam-reservoir-foundation interaction (DRFI) problem was proposed including the radiation of waves to the unbounded rock and reservoir domains. Lagrangian fluid elements were used to discretize the near-field reservoir domain, while the presented infinite fluid elements were used to discretize the far-field reservoir domain. The fully coupled equation of motion for DRFI problem was solved by direct method. A two-dimensional (2D) plane-strain FE formulation of the problem is written in FORTRAN 90 programming language. Investigations were conducted on the effect of near-field domain size (length and depth) on the dynamic behavior of DRFI, dam-foundation interaction (DFI), and dam-reservoir interaction (DRI) problems. The results of this study demonstrate that the proposed model outperforms many other models that have been evolved in the literature in terms of accuracy and speed. The reflected hydrodynamic pressures at the far-field reservoir domain were efficiently absorbed by the suggested infinite fluid elements. The near-field domains size has a noticeable impact on the dynamic behavior of the dam. Making an exact choice about the size is more challenging. However, it was observed that the size of 1.5H is the physically appropriate response.","PeriodicalId":18192,"journal":{"name":"Latin American Journal of Solids and Structures","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67620786","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

Automatic Form-finding of N-4 Type Tensegrity Structures N-4型张拉整体结构的自动找形

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2022-01-01 DOI: 10.1590/1679-78256735

Xiaoming Yu, Yinghua Yang, Ya-dong Ji

引用次数: 0

Second–order models for the bending analysis of thin and moderately thick circular cylindrical shells 薄和中厚圆柱壳弯曲分析的二阶模型

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2022-01-01 DOI: 10.1590/1679-78256843

C. Nwoji, Deval Godwill Ani

{"title":"Second–order models for the bending analysis of thin and moderately thick circular cylindrical shells","authors":"C. Nwoji, Deval Godwill Ani","doi":"10.1590/1679-78256843","DOIUrl":"https://doi.org/10.1590/1679-78256843","url":null,"abstract":"The suitability of employing the second-order shear deformation theory to static bending problems of thin and moderately thick isotropic circular cylindrical shells was investigated. Two variant forms of the polynomial second-order displacement models were considered. Both models account for quadratic expansions of the surface displacements along the shell thickness, although the second model (SSODM) was augmented by the initial curvature term. The equilibrium equations were derived by use of the principle of virtual work. Navier analytical solutions were obtained under simply supported boundary conditions. The results of the displacements and stresses revealed that the theory formulated on the SSODM provides a good depiction of the bending response of thin and moderately thick shells and are in close agreement with those of the first and higher-order shear deformation theories (FSDT; HSDT). The ability of the theory formulated on the first model (FSODM) to predict adequate values of displacements and stresses in thin shells was found to be significantly affected by changes in length to radius of curvature ( l/a ) ratios","PeriodicalId":18192,"journal":{"name":"Latin American Journal of Solids and Structures","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67619239","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

Numerical and theoretical analysis of geosynthetic encased stone column composite foundation under cyclic loading 循环荷载作用下土工合成包石柱复合地基的数值与理论分析

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2022-01-01 DOI: 10.1590/1679-78256979

J. Gao, Xuelei Xie, Jiajun Wang, Luo Liu, Wenjie Zhang

引用次数: 1

Influence of strongly-constrained liquid-filled composite armor on stability of incoming shaped charge jet during eccentric penetration 强约束充液复合装甲对偏心侵彻来时聚能射流稳定性的影响

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2022-01-01 DOI: 10.1590/1679-78257098

You-er Cai, Zhengxiang Huang, Yaping Tan, X. Zu, Xiaojun Shen, Xin Jia

{"title":"Influence of strongly-constrained liquid-filled composite armor on stability of incoming shaped charge jet during eccentric penetration","authors":"You-er Cai, Zhengxiang Huang, Yaping Tan, X. Zu, Xiaojun Shen, Xin Jia","doi":"10.1590/1679-78257098","DOIUrl":"https://doi.org/10.1590/1679-78257098","url":null,"abstract":"Compared with central penetration, the eccentric penetration of jet into a liquid-filled composite armor (LCA) shows a more obvious lateral displacement due to the asymmetric impact by the shock wave and liquid radial reflux. Based on this characteristic, the reaming process in the liquid layer during the shaped charge jet (SCJ) penetrates into the strongly-constrained liquid-filled composite armor (SLCA) eccentrically, the interference process of jet is subjected to the asymmetric impact by the shock wave and liquid radial reflux, and the lateral movement process of the SCJ under lateral force loading is analyzed to study the influence of SLCA on the stability of incoming SCJ during eccentric penetration. Theoretical and X-ray experimental results show that when the eccentricity distance is [0 mm, 12 mm], the severely disturbed velocity range and total disturbed velocity range of the SCJ increase with the increase of the eccentricity distance, while the maximum lateral displacement of the SCJ decreases slightly with the increase of the eccentricity distance at [1 mm, 12 mm].","PeriodicalId":18192,"journal":{"name":"Latin American Journal of Solids and Structures","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67620637","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

XFEM Modelling and Experimental Observations of Foam Concrete Beam Externally-Bonded with KFRP Sheet KFRP外粘结泡沫混凝土梁的XFEM模拟与试验观察

IF 1.2 4区工程技术

Latin American Journal of Solids and Structures Pub Date : 2022-01-01 DOI: 10.1590/1679-78257205

M. R. Maulana, S. Sugiman, H. Ahmad, Z. Jaini, H. Mansor

引用次数: 3

Numerical evaluation of the seismic performance of thin reinforced concrete wall buildings representative of the industrialized building system 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: 10.1590/1679-78256759

Eduar Cuesvas, R. Ortega, J. Marulanda, P. Thomson, G. Areiza, Alejandro Cruz

引用次数: 1