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2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)最新文献

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Evaluation on Operation Performance Improvement of RCC Dam using Cloud Model 基于云模型的碾压混凝土大坝运行性能改进评价
2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR) Pub Date : 2021-11-06 DOI: 10.1109/ICHCESWIDR54323.2021.9656475
Erfeng Zhao, Xin Li, Bo Li
{"title":"Evaluation on Operation Performance Improvement of RCC Dam using Cloud Model","authors":"Erfeng Zhao, Xin Li, Bo Li","doi":"10.1109/ICHCESWIDR54323.2021.9656475","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656475","url":null,"abstract":"The objective function of economic benefit evaluation of engineering reinforcement is established for the improvement of operation performance of roller compacted concrete (RCC) dam, through maximizing the comprehensive benefit, minimizing the repair cost and the risk degree. Based on the cloud model theory, an innovative optimal decision-making model is proposed. These methods were applied in a RCC dam under operation for nearly 20 years, the variation laws of deformation, stress and seepage under different reinforcement schemes were explored through numerical simulation, and the evaluation indexes were scored by experts. The calculation results of the cloud model comprehensive evaluation set for different schemes are obtained, and the implementation effect of each scheme is evaluated accordingly.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133843582","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
Extraction of Pipeline Vibration Feature Information Based on the Combination of EWT and SVD 基于小波变换和奇异值分解相结合的管道振动特征信息提取
2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR) Pub Date : 2021-11-06 DOI: 10.1109/ICHCESWIDR54323.2021.9656447
Yina Zhang, Jinlin Huang, Yong Wang, Ziyu Li, Jianwei Zhang
{"title":"Extraction of Pipeline Vibration Feature Information Based on the Combination of EWT and SVD","authors":"Yina Zhang, Jinlin Huang, Yong Wang, Ziyu Li, Jianwei Zhang","doi":"10.1109/ICHCESWIDR54323.2021.9656447","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656447","url":null,"abstract":"Due to the problem of endpoint effect in the decomposition of hydraulic structure vibration data by EMD (empirical mode decomposition) method and the resultant mode confusion, a method based on EWT (empirical wavelet transform) combined with SVD (singular value decomposition) of hydraulic structure vibration signal noise reduction method. It is verified through engineering examples that the combination of EWT and SVD can effectively filter out high-frequency vibration noise and low-frequency water flow noise, and has superiority in extracting the characteristic information of hydraulic structure vibration signal.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117111606","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
Seismic Performance Analysis and Safety Assessment of Wind Turbine Tower System 风电塔架系统抗震性能分析与安全评价
2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR) Pub Date : 2021-11-06 DOI: 10.1109/ICHCESWIDR54323.2021.9656241
Q. Cao
{"title":"Seismic Performance Analysis and Safety Assessment of Wind Turbine Tower System","authors":"Q. Cao","doi":"10.1109/ICHCESWIDR54323.2021.9656241","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656241","url":null,"abstract":"The seismic safety and serviceability of main wind turbine tower system structures after an earthquake is important to the seismic reliability of the whole wind engineering. This study proposed a performance-based seismic design methodology for wind towers system based on the incremental dynamic analysis (IDA) by finite element method, which taken into account the interaction of the tower system with the soil ground. An IDA-based seismic assessment method including fractile and fragility analyses for a 1.5MW wind turbine tower system case was developed. Then, the occurrence and development of the concrete foundation cracks, failure modes and mechanisms were investigated according to a series of nonlinear numerical simulation tests.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117271861","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
Analysis of Displacement Field of Shallow Buried Biased Tunnel with Small Clear Distance 小净距浅埋偏压隧道位移场分析
2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR) Pub Date : 2021-11-06 DOI: 10.1109/ICHCESWIDR54323.2021.9656272
Jianwu Gong, Chao Zhang
{"title":"Analysis of Displacement Field of Shallow Buried Biased Tunnel with Small Clear Distance","authors":"Jianwu Gong, Chao Zhang","doi":"10.1109/ICHCESWIDR54323.2021.9656272","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656272","url":null,"abstract":"The geological conditions and rock formations used to build tunnels are often complex. Therefore, in order to ensure the safety of construction, it is very important to analyze the stability of surrounding rock in advance. In this paper, based on the tunnel process, the monitoring data are analyzed firstly. The variation law of tunnel vault settlement and horizontal convergence is obtained. Secondly, the numerical simulation method is used to simulate the construction process of shallow buried tunnel with bias and small clear distance. The interaction between the construction of left and right tunnel and the distribution characteristics of surrounding rock displacement field are obtained. Finally, the simulation results are compared with the monitoring data. The simulated values are smaller than the monitored values on the whole, but the overall variation rule is basically the same.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"503 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123067380","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
Experimental study on damage law of fully graded concrete under tension compression cyclic load 张压循环荷载作用下全级配混凝土损伤规律试验研究
2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR) Pub Date : 2021-11-06 DOI: 10.1109/ICHCESWIDR54323.2021.9656320
Chunlei Li, Lijun Zhao, Haibo Wang, J. Tu
{"title":"Experimental study on damage law of fully graded concrete under tension compression cyclic load","authors":"Chunlei Li, Lijun Zhao, Haibo Wang, J. Tu","doi":"10.1109/ICHCESWIDR54323.2021.9656320","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656320","url":null,"abstract":"Considering the reciprocating action of seismic load and the high compressive stress level of high arch dam, the damage law of fully graded concrete under tension compression cyclic load is studied. Based on 15MN large-scale dynamic material testing machine and specially designed linking device, the complete stress-strain curve of full graded concrete under cyclic load is obtained by means of high-precision axial extensometer and VIC-3D. The test data show that even at the medium and low pressure stress level, the full graded concrete will produce a certain amount of residual deformation, and has a good linear relationship with the pressure. Because the difference of ultimate strain between tension and compression of concrete is about 10 times, the compressive residual has great influence on the ultimate tensile strain. Ignoring the residual deformation under high pressure will overestimate the tensile strength of fully graded concrete, which is unsafe. Based on the stress-strain curve of tensile damage of fully graded concrete, it can be seen that the elastic modulus of fully graded concrete cannot be recovered immediately after tension compression conversion, but there is an obvious transition zone. The calculation results of the model ignoring the transition zone are unsafe.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121387990","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
Effect of double track tunnel with small distance on existing tunnel deformation 小间距双线隧道对既有隧道变形的影响
2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR) Pub Date : 2021-11-06 DOI: 10.1109/ICHCESWIDR54323.2021.9656286
P. Hu, Y. Teng, Meng Li, Liang Ma
{"title":"Effect of double track tunnel with small distance on existing tunnel deformation","authors":"P. Hu, Y. Teng, Meng Li, Liang Ma","doi":"10.1109/ICHCESWIDR54323.2021.9656286","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656286","url":null,"abstract":"MIDSA/ GTS software is used to simulate the double track parallel shield construction. The influence of double track shield construction on the existing tunnel under different small clear distance is studied, and the displacement and plastic zone development law of the existing tunnel are summarized. The analysis shows that the subsequent shield excavation will cause the clearance expansion and vault subsidence of the existing tunnel, and the uplift deformation of the inverted arch and the plastic zone of the surrounding rock of the tunnel will further become larger. When the clear distance is only 0. 8 times the tunnel diameter, reinforcement measures need to be taken.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122629842","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
Finite Element Analysis of Seismic Performance of Duplex Concrete Filled Steel Tubular Column and Steel Beam Spatial Joint 钢管混凝土双柱-钢梁空间节点抗震性能有限元分析
2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR) Pub Date : 2021-11-06 DOI: 10.1109/ICHCESWIDR54323.2021.9656206
Y. Bao, Z. Ke, Zhi-an Jiao, Yang Guo, J. Wei, Meng Sun
{"title":"Finite Element Analysis of Seismic Performance of Duplex Concrete Filled Steel Tubular Column and Steel Beam Spatial Joint","authors":"Y. Bao, Z. Ke, Zhi-an Jiao, Yang Guo, J. Wei, Meng Sun","doi":"10.1109/ICHCESWIDR54323.2021.9656206","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656206","url":null,"abstract":"To study the influence of the cutting depth of the beam flange on the seismic performance of the spatial joints between the duplex concrete-filled steel tubular column and H-shaped steel beam, six finite element models were established using ABAQUS finite element software, and low-cycle reciprocating loads were applied to the beam ends of the joint model. The results show that the cutting depth of the steel beam flange has a greater impact on the seismic resistance of the spatial joint between the duplex concrete-filled steel tubular column and the steel beam. With the increase of the cutting depth, the energy dissipation capacity of the joint first increases and then decreases, and the ductility of the joint is improved, but the stiffness and limit bearing capacity of the joint has decreased. Especially when the cutting depth is too large, the web in the weakened area of the H-shaped steel beam is prone to buckling instability.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"386 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122778900","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
Variation Characteristics of Extreme Precipitation in the Shiwulihe River Basin in Hefei 合肥十五里河流域极端降水变化特征
2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR) Pub Date : 2021-11-06 DOI: 10.1109/ICHCESWIDR54323.2021.9656429
Qiuyue Lian, Xuekai Chen, Xiaobo Liu, F. Dong
{"title":"Variation Characteristics of Extreme Precipitation in the Shiwulihe River Basin in Hefei","authors":"Qiuyue Lian, Xuekai Chen, Xiaobo Liu, F. Dong","doi":"10.1109/ICHCESWIDR54323.2021.9656429","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656429","url":null,"abstract":"Due to the influence of climate warming and human activities, extreme precipitation events occur frequently in various parts of the country. In order to reduce their negative impacts, the present study envisaged a systematic and comprehensive analysis of the variation characteristics in extreme precipitation of the Shiwulihe River Basin. Based on the daily precipitation data of the Shiwulihe River Basin in Hefei from 1960 to 2019, six extreme precipitation indexes such as RX1day, RX5day, R20 mm, R95P, SDII and CWD were selected. The variation characteristics in the extreme precipitation were analyzed using linear trend analysis, M-K non-parametric test, sliding T test, Morlet continuous complex wavelet analysis, and Pearson correlation analysis. The results reveal the time-varying characteristics of extreme precipitation in Shiwulihe River Basin.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123901183","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
Key Technology of Improvement on Shield Muck in Water Rich Boulder Stratum 富水卵石层盾构渣土改造关键技术
2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR) Pub Date : 2021-11-06 DOI: 10.1109/ICHCESWIDR54323.2021.9656411
Wen Liu, Tianrui Liu, Zhiyong Yang, Bo Xu
{"title":"Key Technology of Improvement on Shield Muck in Water Rich Boulder Stratum","authors":"Wen Liu, Tianrui Liu, Zhiyong Yang, Bo Xu","doi":"10.1109/ICHCESWIDR54323.2021.9656411","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656411","url":null,"abstract":"In order to reduce the adverse effects of shield construction in water rich boulder stratum and solve the problems such as large cutter head wear, sticking phenomenon and surface settlement during construction, the study of soil improvement technology during construction of the earth pressure balance (EPB) shield in the water rich boulder stratum with a particle size larger than 200mm is carried out, with Chengdu metro line 17 as the engineering background. The improvement characteristics of boulders are evaluated from three aspects including mobility, permeability and agitation resistance, and the idea of improvement on muck in water rich boulder stratum is developed, that is, the foam injection rate is about 45%, the water injection rate is about 5%, and the bentonite injection is about 2%. The results show that this technology can provide the best parameters for the EPB shield construction in water rich boulder stratum.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124237808","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
Analysis of The Spatial and Temporal Distribution Patterns of Rainfall in Shenzhen 深圳市降水时空分布格局分析
2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR) Pub Date : 2021-11-06 DOI: 10.1109/ICHCESWIDR54323.2021.9656359
Hang Yao, Donghui Wan, Yunqiu Shi, Xinqiao Zheng, Hualong Ding, Hao Chen
{"title":"Analysis of The Spatial and Temporal Distribution Patterns of Rainfall in Shenzhen","authors":"Hang Yao, Donghui Wan, Yunqiu Shi, Xinqiao Zheng, Hualong Ding, Hao Chen","doi":"10.1109/ICHCESWIDR54323.2021.9656359","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656359","url":null,"abstract":"The differences in the spatial and temporal distribution of urban rainfall are related to the deployment of urban flood control and disaster mitigation. In this paper, Shenzhen city is taken as the study area. We use Mann-Kendall trend test method, wavelet analysis method and R/S method to explore the trend, cycle characteristics and persistence of annual rainfall, number of rainfall days and daily maximum rainfall in different areas of Shenzhen. The results show that the overall trend of annual rainfall in Shenzhen is not significant, and the spatial distribution of annual rainfall in the city will gradually form a decreasing pattern from east to west. The number of rainfall days in Shenzhen do not changed significantly with a variation of $2.7sim 6.1$ d/10a, and the future the number of rainfall days may form a spatial distribution of more in the southeast and less in the northwest. The daily maximum rainfall variation in Shenzhen is $5.4sim 12.2$ mm/10a. The future spatial distribution of daily maximum rainfall will maintain the situation of more in the southeast and less in the northwest, but the difference between the daily maximum rainfall in Dapeng and other areas will continue to become larger.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"216 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124271810","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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