SDHM Structural Durability and Health Monitoring最新文献_第4页

A Deep Learning Based Approach for Response Prediction of Beam-likeStructures 基于深度学习的类梁结构响应预测方法

SDHM Structural Durability and Health Monitoring Pub Date : 2020-01-01 DOI: 10.32604/sdhm.2020.010564

Tianyu Wang, Wael A. Altabey, M. Noori, Ramin Ghiasi

引用次数: 22

Dynamic Simulation of Cracked Buildings for Damage Detection 裂纹建筑物损伤检测的动态仿真研究

SDHM Structural Durability and Health Monitoring Pub Date : 2020-01-01 DOI: 10.32604/sdhm.2020.010743

Alan Alonso-Rivers, R. Salgado-Estrada

引用次数: 0

Improvement of UAV Based an Evaluation Approach to Mid-High RiseBuildings’ Exterior Walls 基于无人机的中高层建筑外墙评价方法改进

SDHM Structural Durability and Health Monitoring Pub Date : 2020-01-01 DOI: 10.32604/sdhm.2020.06489

Nai-Hsin Pan, Ching-hsiang Tsai, Kuei-yen Chen, Shiaofang Sung

{"title":"Improvement of UAV Based an Evaluation Approach to Mid-High Rise\u0000Buildings’ Exterior Walls","authors":"Nai-Hsin Pan, Ching-hsiang Tsai, Kuei-yen Chen, Shiaofang Sung","doi":"10.32604/sdhm.2020.06489","DOIUrl":"https://doi.org/10.32604/sdhm.2020.06489","url":null,"abstract":"This research will develop a set of assessment techniques and procedures for exterior wall deterioration detection. The proposed method is mainly based on equipped with high-resolution photographic equipment for unmanned aerial vehicle (UAV). To overcome the problems of visual inspection difficulties due to different angles and height, the proposed method provides a safer and more efficient detection way to get the buildings’ exterior status. After using the proposed method to analyze the images taken from UAV, the size of the damaged area can be evaluated more accurately, and the accuracy rate of visual assessment will be significantly improved. The results of the proposed method can reduce the accidents caused by the inspection process in the critical environment and the costs incurred by the temporary facilities without sacrificing the quality of the inspection results. Then, the research will implement the existing visual assessment method because of the characteristics of rapid detection, however, the assessment results will be different from different inspectors due to subjectivity. Thus, the research will present an improved visual inspection method by using UAVand Forward Looking Infred Thermal technology (FLIR). The result will be presented by Condition Index (CI-Level) instead to improve the subjectivity of the personnel.","PeriodicalId":35399,"journal":{"name":"SDHM Structural Durability and Health Monitoring","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69901864","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

Finite Element Analysis on Vibration Characteristics of an Offshore Floating Breakwater 海上浮式防波堤振动特性的有限元分析

SDHM Structural Durability and Health Monitoring Pub Date : 2020-01-01 DOI: 10.32604/sdhm.2020.07457

Hong Yan, Dingguo Zhang, Liang Li, Xiaoyu Luo

{"title":"Finite Element Analysis on Vibration Characteristics of an Offshore Floating Breakwater","authors":"Hong Yan, Dingguo Zhang, Liang Li, Xiaoyu Luo","doi":"10.32604/sdhm.2020.07457","DOIUrl":"https://doi.org/10.32604/sdhm.2020.07457","url":null,"abstract":"The construction of seaside facilities is a hot topic in the field of ocean engineering. In this paper, a new type of floating breakwater is designed by 3DCAD geometric modeling. Based on the vibration theory and finite element technology, the floating breakwater model is optimized, and the modal analysis of the structure with the bracket as main body and blades as functional attachments is carried out. Natural frequencies and mode shapes of the blades are first calculated, and the effects of the natural frequencies in both dry and wet conditions are taken into account. Modal analysis and harmonic response analysis of the bracket with different lengths by removing the blades are also carried out, and the different variations of the natural frequencies between several bracket units are compared. The responses of the key position of the bracket under different loads and different bracket lengths are analyzed. The influence of liquid on the natural frequency of the blades and the influence of the length of the bracket on the natural frequency of the bracket are discussed in the fluid-solid coupling state. Research in this paper provides a data basis for the safety assessment of the breakwater construction.","PeriodicalId":35399,"journal":{"name":"SDHM Structural Durability and Health Monitoring","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69901871","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

Fatigue Performance Evaluation for Welded Details in Orthotropic Steel DeckBridges Using Multi-Scale Finite Element Method 基于多尺度有限元法的正交各向异性钢甲板桥焊接细部疲劳性能评价

SDHM Structural Durability and Health Monitoring Pub Date : 2020-01-01 DOI: 10.32604/sdhm.2020.08997

R. Chen, C. Miao

{"title":"Fatigue Performance Evaluation for Welded Details in Orthotropic Steel Deck\u0000Bridges Using Multi-Scale Finite Element Method","authors":"R. Chen, C. Miao","doi":"10.32604/sdhm.2020.08997","DOIUrl":"https://doi.org/10.32604/sdhm.2020.08997","url":null,"abstract":"In order to study the fatigue properties of rib-to-deck welded connection and rib-to-rib welded connection in orthotropic steel bridge decks, a multi-scale finite element model was set up to analyze the stress distribution characteristics and the load test was conducted on the Taizhou Yangtze River Bridge. Comparing the vehicle test results with the multi-scale finite element model results to verify the accuracy of the finite element simulation for the stress response of two welded details. The results indicated that: The stress at the rib-to-deck welded connection and the rib-to-rib welded connection are the bending stress and the membrane stress, respectively; the stress response of the two welded connection has strong local characteristics; the lateral stress influence line of the two welded connection is relatively short and the length of the lateral stress influence line is greatly affected by the longitudinal ribs; increasing the thickness of the roof and longitudinal ribs can reduce the stress response and improve the stress performance of the heavy lanes. For the two welded details, the fatigue damage increment of the ordinary lane is greater than the heavy lane. The thickened roof and longitudinal ribs at the position of the heavy lane still cannot balance the fatigue damage caused by the heavy truck. Therefore, it is necessary to strictly control the fatigue effect of overloaded vehicles on steel box girders.","PeriodicalId":35399,"journal":{"name":"SDHM Structural Durability and Health Monitoring","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69901592","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

Influencing Factors of Load Carrying Capacity and Cooperative Work Laws ofMetro Uplift Piles 地铁拔桩承载力影响因素及协同工作规律

SDHM Structural Durability and Health Monitoring Pub Date : 2020-01-01 DOI: 10.32604/sdhm.2020.06482

Bo Liu, Haoran Li, Shuya Liu

{"title":"Influencing Factors of Load Carrying Capacity and Cooperative Work Laws of\u0000Metro Uplift Piles","authors":"Bo Liu, Haoran Li, Shuya Liu","doi":"10.32604/sdhm.2020.06482","DOIUrl":"https://doi.org/10.32604/sdhm.2020.06482","url":null,"abstract":": The buoyancy of groundwater can reduce the foundation bearing capacity and cause the metro tunnels to ﬂ oat as a whole, which threatens the safety of structures seriously. Therefore, uplift piles are set up to improve the structural sta-bility. In this paper, FLAC3D software is used to establish the calculation models of pile foundation. The bearing failure process of uplift piles was simulated to study the in ﬂ uencing factors on single pile load bearing capacity as well as the cooperative work laws of pile groups. The load-displacement curves of pile top under different length-diameter ratios, pile-soil interface characteristics and pile types are obtained, respectively. The results showed that, increasing the length-diameter ratio and the pile-soil interface roughness properly can improve the bearing capacity of uplift piles. Besides, changing the shapes of constant pile section can also improve it, which has the most signi ﬁ cant effect concerning of saving material cost. In the loading process of pile groups, the ultimate bearing capacity of corner pile is the biggest, the side pile is the next, and the center pile is the smallest. The deformation characteristics of pile top are as follows: the center pile is the biggest, the side pile is the next, and corner pile is the smallest. Combined with the results, the uplift resistance of group piles can be enhanced pertinently, and the conclusions provide guidance for the design and construction of uplift piles in the actual engineer.","PeriodicalId":35399,"journal":{"name":"SDHM Structural Durability and Health Monitoring","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69901792","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

Experimental Study on Permeability Characteristics of Geotubes for SeepageAnalysis on Safety Assessment of Dams 土工管渗水渗透特性试验研究

SDHM Structural Durability and Health Monitoring Pub Date : 2020-01-01 DOI: 10.32604/sdhm.2020.011009

Xiao-lei Man, Ganggang Sha, Shuigen Hu, H. Bao, Guangying Liu

{"title":"Experimental Study on Permeability Characteristics of Geotubes for Seepage\u0000Analysis on Safety Assessment of Dams","authors":"Xiao-lei Man, Ganggang Sha, Shuigen Hu, H. Bao, Guangying Liu","doi":"10.32604/sdhm.2020.011009","DOIUrl":"https://doi.org/10.32604/sdhm.2020.011009","url":null,"abstract":": Geotubes are heterogeneous structures composed of ﬁ lling sand and bag material, and its permeability characteristics are different from that of ﬁ lling sand. The uncertainty of geotubes permeability characteristics results in the failure of seepage analysis of geotube dams, which restricts the safety assessment of the dams. As the basis of the study on the seepage mechanism of the geotubes, the in ﬂ uence of particle grading on permeability coef ﬁ cient of ﬁ lling sand and sand covered with geotextiles were explored by the permeability tests of ﬁ lling sand with different particle grading under the condition of sand covered with or without geotextiles. And the in ﬂ uence of geotextiles on the permeability coef ﬁ cient was analyzed by comparing permeability coef ﬁ cient of sand covered with and without geotextiles. The test results show that the in ﬂ uence of single particle size content on permeability coef ﬁ cient is consistent under the condition of sand covered with and without geotextiles. The content of powder, ﬁ ne, medium and coarse particles is linearly related to their respective permeability coef ﬁ cients. And the content of powder, ﬁ ne, medium particles is negatively correlated with their permeability coef ﬁ cients, while the content of coarse particles is positively correlated with the permeability coef ﬁ cient. But the permeability coef ﬁ cient of sand covered with geotextiles is smaller than that of ﬁ lling sand under the same conditions. Finally, the parameter d 250 C c C u was selected as a variable representing the particle grading to ﬁ t the empirical formula of permeability coef ﬁ cient of ﬁ lling sand and sand covered with geotextiles.","PeriodicalId":35399,"journal":{"name":"SDHM Structural Durability and Health Monitoring","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69901126","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

Characteristics on Seawater Corrosion of Intensely Weathered SurroundingRock of Subsea Tunnel 海底隧道强风化围岩海水腐蚀特性研究

SDHM Structural Durability and Health Monitoring Pub Date : 2020-01-01 DOI: 10.32604/sdhm.2020.07619

Peishuai Chen, Jun-jie Cao, Wei-zhong Chen, W. Rao

引用次数: 0

Damage Detection for CFRP Based on Planar Electrical CapacitanceTomography 基于平面电容成像的CFRP损伤检测

SDHM Structural Durability and Health Monitoring Pub Date : 2020-01-01 DOI: 10.32604/sdhm.2020.013001

W. Fan, Chi Wang

{"title":"Damage Detection for CFRP Based on Planar Electrical Capacitance\u0000Tomography","authors":"W. Fan, Chi Wang","doi":"10.32604/sdhm.2020.013001","DOIUrl":"https://doi.org/10.32604/sdhm.2020.013001","url":null,"abstract":"Due to the widespread use of carbon fiber reinforced polymer/plastic (CFRP), the nondestructive structural health monitoring for CFRP is playing an increasingly essential role. As a nonradiative, noninvasive and nondestructive detection technique, planar electrical capacitance tomography (PECT) electrodes array is employed in this paper to reconstruct the damage image according to the calculated dielectric constant changes. The shape and duty ratio of PECT electrodes are optimized according to the relations between sensitivity distribution and the dielectric constant of different anisotropic degrees. The sensitivity matrix of optimized PECT sensor is more uniform as the result shows, because the sensitivity of insensitivity area can be increased by adding rotation of optimized electrodes. The reconstructed image qualities due to different PECT arrays and different damage locations are investigated at last. The simulation results indicate that: PECT can be used to detect the surface damage of CFRP; the sensitivity matrix of PECT for CFRP is highly relevant with the degree of anisotropic dielectric constant; the rotatable PECT sensor with rotation has better performance in uniformity of sensitivity; for different damage locations, the rotatable sensor with rotation has better image quality in most cases.","PeriodicalId":35399,"journal":{"name":"SDHM Structural Durability and Health Monitoring","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69901777","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

Nonlinear Micromechanical Modelling of Transverse Tensile Damage Behavior in Fiber-Reinforced Polymer Composites 纤维增强聚合物复合材料横向拉伸损伤行为的非线性细观力学建模

SDHM Structural Durability and Health Monitoring Pub Date : 2019-01-01 DOI: 10.32604/sdhm.2019.07521

Nian Li

引用次数: 0