2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)最新文献
Pub Date : 2021-11-06DOI: 10.1109/ICHCESWIDR54323.2021.9656211
Yong Wang, Wenxuan Wang, Wei Li, Jianwei Zhang
The selection of interlayer shear strength parameters of RCC is very important for the stability and safety of dam. Because of the characteristic of layered roller compaction, the joint of each layer will become the weak layer in the concrete, which plays a key role in the calculation of anti-slip stability of RCC gravity dam. In this paper, in-situ shear tests of 180d RCC with different interlayer treatment methods were carried out, and the shear strength parameters of different interlayer treatment methods were obtained. The results show that all the interlayer treatment measures and interlayer bonding quality of the RCC test meet the engineering requirements.
{"title":"In-situ Shear Test of RCC Technology for Dahuaqiao Hydropower Station Dam Project","authors":"Yong Wang, Wenxuan Wang, Wei Li, Jianwei Zhang","doi":"10.1109/ICHCESWIDR54323.2021.9656211","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656211","url":null,"abstract":"The selection of interlayer shear strength parameters of RCC is very important for the stability and safety of dam. Because of the characteristic of layered roller compaction, the joint of each layer will become the weak layer in the concrete, which plays a key role in the calculation of anti-slip stability of RCC gravity dam. In this paper, in-situ shear tests of 180d RCC with different interlayer treatment methods were carried out, and the shear strength parameters of different interlayer treatment methods were obtained. The results show that all the interlayer treatment measures and interlayer bonding quality of the RCC test meet the engineering requirements.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"52 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":"115730717","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}
Pub Date : 2021-11-06DOI: 10.1109/ICHCESWIDR54323.2021.9656409
D. Lei
In order to improve the deformation performance and damage tolerance of frame columns under seismic load and optimize the seismic performance of frame columns, using polyvinyl alcohol fiber reinforced cement-based composite (PVAFRCC) instead of ordinary concrete is one of the effective ways. At present, many scholars' research on the seismic performance of PVA-FRCC columns mainly focuses on short columns with high axial compression ratio or using PVA-FRCC instead of ordinary concrete in beam column joints. Based on this, considering the influence of axial compression ratio, shear span ratio and longitudinal reinforcement ratio on the seismic performance of PVA-FRCC medium-long columns, seven medium-long columns with fiber volume content of 1% were designed in this paper. Through quasi-static test, the crack development of the specimens under low cyclic loading was observed, and their hysteretic behavior, skeleton curve Degradation of energy dissipation capacity and bearing capacity. The test results showed that each medium-long column has good ductility bending failure, and the concrete protective layer does not fall off during failure. Increasing the axial compression ratio can improve the cracking load, yield load and peak load of PVA-FRCC columns, but the ductility and energy dissipation capacity are reduced. At the same time, it can reduce the number of cracks and limit the width of cracks; With the increase of shear span ratio, the bearing capacity of PVAFRCC columns decreases, but the deformation capacity and energy dissipation capacity are greatly improved; With the increase of reinforcement ratio, the bearing capacity, ductility and energy dissipation capacity of PVA-FRCC columns are improved, and the degradation rate of stiffness and bearing capacity is slowed down, which can effectively improve the seismic performance of members; The shear span ratio and axial compression ratio have a great influence on the seismic performance of FRCC columns.
{"title":"Experimental Study On Seismic Resistance Of PVA-FRCC Medium - Long Column With Reinforcement Under Low Cyclic Load","authors":"D. Lei","doi":"10.1109/ICHCESWIDR54323.2021.9656409","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656409","url":null,"abstract":"In order to improve the deformation performance and damage tolerance of frame columns under seismic load and optimize the seismic performance of frame columns, using polyvinyl alcohol fiber reinforced cement-based composite (PVAFRCC) instead of ordinary concrete is one of the effective ways. At present, many scholars' research on the seismic performance of PVA-FRCC columns mainly focuses on short columns with high axial compression ratio or using PVA-FRCC instead of ordinary concrete in beam column joints. Based on this, considering the influence of axial compression ratio, shear span ratio and longitudinal reinforcement ratio on the seismic performance of PVA-FRCC medium-long columns, seven medium-long columns with fiber volume content of 1% were designed in this paper. Through quasi-static test, the crack development of the specimens under low cyclic loading was observed, and their hysteretic behavior, skeleton curve Degradation of energy dissipation capacity and bearing capacity. The test results showed that each medium-long column has good ductility bending failure, and the concrete protective layer does not fall off during failure. Increasing the axial compression ratio can improve the cracking load, yield load and peak load of PVA-FRCC columns, but the ductility and energy dissipation capacity are reduced. At the same time, it can reduce the number of cracks and limit the width of cracks; With the increase of shear span ratio, the bearing capacity of PVAFRCC columns decreases, but the deformation capacity and energy dissipation capacity are greatly improved; With the increase of reinforcement ratio, the bearing capacity, ductility and energy dissipation capacity of PVA-FRCC columns are improved, and the degradation rate of stiffness and bearing capacity is slowed down, which can effectively improve the seismic performance of members; The shear span ratio and axial compression ratio have a great influence on the seismic performance of FRCC columns.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"33 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":"117118878","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}
Pub Date : 2021-11-06DOI: 10.1109/ICHCESWIDR54323.2021.9656325
Chen Xu, Yujie Zhu, Xiaogang Guo, Xiaoli Liu
Based on the design of experiments (DOE) and the response surface method, we studied the mesoscopic parameters calibration for hard rocks in three-dimensional particle flow code (PFC). First, using the range analysis and multivariate analysis of variance, the linear relationship between mesoscopic and macroscopic parameters is established. Then, we used the response surface method to obtain the nonlinear relationship between the mesoscopic parameters and the macroscopic response. Finally, this problem was transformed into a nonlinear multi objective mathematical programming problem, and the genetic algorithm was utilized to solve it. To verify our proposed method, we compared the obtained results with the physical tests. The results show that the error of macroscopic parameters was less than 10%. A computer calibration program interface was developed based on the proposed model. This model and the computer program can be used in the rock calibrations for numerical simulations in the future.
{"title":"Meso-parameters Calibration of Rock Specimens Based on Flat-Joint Contact Model","authors":"Chen Xu, Yujie Zhu, Xiaogang Guo, Xiaoli Liu","doi":"10.1109/ICHCESWIDR54323.2021.9656325","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656325","url":null,"abstract":"Based on the design of experiments (DOE) and the response surface method, we studied the mesoscopic parameters calibration for hard rocks in three-dimensional particle flow code (PFC). First, using the range analysis and multivariate analysis of variance, the linear relationship between mesoscopic and macroscopic parameters is established. Then, we used the response surface method to obtain the nonlinear relationship between the mesoscopic parameters and the macroscopic response. Finally, this problem was transformed into a nonlinear multi objective mathematical programming problem, and the genetic algorithm was utilized to solve it. To verify our proposed method, we compared the obtained results with the physical tests. The results show that the error of macroscopic parameters was less than 10%. A computer calibration program interface was developed based on the proposed model. This model and the computer program can be used in the rock calibrations for numerical simulations in the future.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"30 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":"127191713","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}
Pub Date : 2021-11-06DOI: 10.1109/ICHCESWIDR54323.2021.9656421
Jifeng Chen, Zhenning Wang, J. Hu, Baowen Hu, Jingkun Wang, Jue Wang
A viscoelastic finite element model is developed to simulate the sealing performance of P-type water seal in its service period. A generalized Maxwell model is applied to describe the viscoelastic constitution relation of the rubber material. This model also considers the incompressibility and geometric nonlinearity caused by large seal deformation under high head water pressure. The parametric studies analyse the influence of precompression and water pressure on the contact stress of the water seal at the initial state, as well as during the service, based on the viscoelastic finite element model. The results provide a theory basis for the design of a P-type water seal.
{"title":"Simulation analysis of P-type water seal considering viscoelasticity of material","authors":"Jifeng Chen, Zhenning Wang, J. Hu, Baowen Hu, Jingkun Wang, Jue Wang","doi":"10.1109/ICHCESWIDR54323.2021.9656421","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656421","url":null,"abstract":"A viscoelastic finite element model is developed to simulate the sealing performance of P-type water seal in its service period. A generalized Maxwell model is applied to describe the viscoelastic constitution relation of the rubber material. This model also considers the incompressibility and geometric nonlinearity caused by large seal deformation under high head water pressure. The parametric studies analyse the influence of precompression and water pressure on the contact stress of the water seal at the initial state, as well as during the service, based on the viscoelastic finite element model. The results provide a theory basis for the design of a P-type water seal.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"22 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":"125178049","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}
Pub Date : 2021-11-06DOI: 10.1109/ICHCESWIDR54323.2021.9656289
Hui Tian, Li Chen
Considering the obviously distinctive methods for liquefaction assessment of cohesiveless soils both at home and abroad, this paper compares and summarizes the available methods for assessing the earthquake liquefaction in offshore wind power applications in current stage. Taking an offshore wind power farm project in eastern Guangdong as an example, the simplified SEED method is adopted to assess the liquefaction of soil masses with the laboratory triaxial test based on the survey and drilling data at typical wind turbine positions on the site. Different soil layers, buried depths, relative densities, and confining pressures are considered in the test. This paper plots the relation curve between the dynamic shear stress ratio and the failure vibration frequency of soil samples under the action of cyclic stresses with a constant amplitude, defines the liquefaction resistance index CRR15, and obtains the liquefaction assessment results by comparing the CRR15 with the calculated CSR according to the seismic design requirements. Besides, the paper also compares the dynamic triaxial test results with the liquefaction assessment results upon the specification approach at the field survey site, showing that both results are substantially identical. These findings may be used for guiding the seismic analysis and foundation structure design on the site of the wind power farm project.
{"title":"Research on Assessment of Earthquake Liquefaction in Offshore Wind Turbine Based on Dynamic Triaxial Test","authors":"Hui Tian, Li Chen","doi":"10.1109/ICHCESWIDR54323.2021.9656289","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656289","url":null,"abstract":"Considering the obviously distinctive methods for liquefaction assessment of cohesiveless soils both at home and abroad, this paper compares and summarizes the available methods for assessing the earthquake liquefaction in offshore wind power applications in current stage. Taking an offshore wind power farm project in eastern Guangdong as an example, the simplified SEED method is adopted to assess the liquefaction of soil masses with the laboratory triaxial test based on the survey and drilling data at typical wind turbine positions on the site. Different soil layers, buried depths, relative densities, and confining pressures are considered in the test. This paper plots the relation curve between the dynamic shear stress ratio and the failure vibration frequency of soil samples under the action of cyclic stresses with a constant amplitude, defines the liquefaction resistance index CRR15, and obtains the liquefaction assessment results by comparing the CRR15 with the calculated CSR according to the seismic design requirements. Besides, the paper also compares the dynamic triaxial test results with the liquefaction assessment results upon the specification approach at the field survey site, showing that both results are substantially identical. These findings may be used for guiding the seismic analysis and foundation structure design on the site of the wind power farm project.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"27 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":"123012713","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}
Pub Date : 2021-11-06DOI: 10.1109/ICHCESWIDR54323.2021.9656251
Z. Chen, Xian Cui
Using the superelasticity and one-way memory function of shape memory alloy SMA to generate greater driving force, a smart concrete beam was developed. Through experiments, the bending resistance and deformation laws of smart concrete beams with shape memory alloy wires are studied, and the optimal solution of composite SMA wires in the mechanical properties of the beams is found. The test results show that laying a one-way memory composite super-elastic shape memory alloy wire on the bottom of the RC beam can effectively improve the deformation ability of the test beam, and the content of the memory wire and the super-elastic wire are different, and their deformation laws and flexural properties are also different.% Memory wire compound 50% super elastic wire has the best repair effect when the damage degree is 70%.
{"title":"Study on the Recovery Performance of RC Beams Reinforced by Shape Memory Alloy Wire","authors":"Z. Chen, Xian Cui","doi":"10.1109/ICHCESWIDR54323.2021.9656251","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656251","url":null,"abstract":"Using the superelasticity and one-way memory function of shape memory alloy SMA to generate greater driving force, a smart concrete beam was developed. Through experiments, the bending resistance and deformation laws of smart concrete beams with shape memory alloy wires are studied, and the optimal solution of composite SMA wires in the mechanical properties of the beams is found. The test results show that laying a one-way memory composite super-elastic shape memory alloy wire on the bottom of the RC beam can effectively improve the deformation ability of the test beam, and the content of the memory wire and the super-elastic wire are different, and their deformation laws and flexural properties are also different.% Memory wire compound 50% super elastic wire has the best repair effect when the damage degree is 70%.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"8 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114123147","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}
Pub Date : 2021-11-06DOI: 10.1109/ICHCESWIDR54323.2021.9656368
Ziyang Tian, Junying Chu, Zuhao Zhou
With the rapid development of China's economy, the number of victims and economic losses caused by Urban Waterlogging continue to increase, and Urban Waterlogging has become the core problem to be solved. Considering the blind spots of related research in the study area, it is necessary to carry out an Urban Waterlogging diagnosis systematically and scientifically in Xining City, so as to provide targeted guidance for solving the waterlogging problem in Xining city. In the framework of Dualistic Hydrological Cycle Process, combined with PSR evaluation model, the pressure P system is composed of urbanization level characteristics, land use characteristics and rainfall evolution characteristics, the state S system is composed of historical waterlogging and current waterlogging, and the response R system is composed of sponge city construction, drainage operation management and drainage network construction. The comprehensive results show that the main causes of Urban Waterlogging in Xining city can be summarized as increased pressure, unbalanced state and scattered response.
{"title":"Mechanism Analysis of the Urban Water-logging based on the PSR model considering Dualistic Hydrological Cycle Process","authors":"Ziyang Tian, Junying Chu, Zuhao Zhou","doi":"10.1109/ICHCESWIDR54323.2021.9656368","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656368","url":null,"abstract":"With the rapid development of China's economy, the number of victims and economic losses caused by Urban Waterlogging continue to increase, and Urban Waterlogging has become the core problem to be solved. Considering the blind spots of related research in the study area, it is necessary to carry out an Urban Waterlogging diagnosis systematically and scientifically in Xining City, so as to provide targeted guidance for solving the waterlogging problem in Xining city. In the framework of Dualistic Hydrological Cycle Process, combined with PSR evaluation model, the pressure P system is composed of urbanization level characteristics, land use characteristics and rainfall evolution characteristics, the state S system is composed of historical waterlogging and current waterlogging, and the response R system is composed of sponge city construction, drainage operation management and drainage network construction. The comprehensive results show that the main causes of Urban Waterlogging in Xining city can be summarized as increased pressure, unbalanced state and scattered response.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"15 3 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":"114249372","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}
Pub Date : 2021-11-06DOI: 10.1109/ICHCESWIDR54323.2021.9656455
Lei Liu, F. Ma, Miao Zhai, Q. Song
Due to the high strength of steel, hybrid structure can effectively reduce the column section and increase the building area, so it is widely used in super high-rise buildings. However, with the increase of the height of super high-rise building and the extension of construction period, the vertical deformation difference between frame column and core tube is becoming larger and larger, and its influence on the levelness of building structure roof and the additional stress in horizontal members is also becoming larger and larger. Therefore, this paper uses the finite element analysis software MIDAS Gen to carry out intelligent monitoring and disaster avoidance for the whole construction process of a super high-rise building, and mainly explains the modeling process, intelligent monitoring and result analysis.
{"title":"Intelligent monitoring and disaster avoidance in the construction of steel frame reinforced concrete hybrid structure","authors":"Lei Liu, F. Ma, Miao Zhai, Q. Song","doi":"10.1109/ICHCESWIDR54323.2021.9656455","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656455","url":null,"abstract":"Due to the high strength of steel, hybrid structure can effectively reduce the column section and increase the building area, so it is widely used in super high-rise buildings. However, with the increase of the height of super high-rise building and the extension of construction period, the vertical deformation difference between frame column and core tube is becoming larger and larger, and its influence on the levelness of building structure roof and the additional stress in horizontal members is also becoming larger and larger. Therefore, this paper uses the finite element analysis software MIDAS Gen to carry out intelligent monitoring and disaster avoidance for the whole construction process of a super high-rise building, and mainly explains the modeling process, intelligent monitoring and result analysis.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"224 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":"114470259","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}
Pub Date : 2021-11-06DOI: 10.1109/ICHCESWIDR54323.2021.9656459
Lixia Yang, Zhendong Shan, Rong Ma, L. Jing
It is possible to obtain a detailed estimates of the expected vibration by dividing the early warning area, to achieve an optimized early warning effect. This paper studies the influence of the warning area division on the warning effect of the the Propagation of Local Undamped Motion (PLUM) method. Japan is divided into grids with side lengths ranging from 30 km to 120 km, and each grid is considered an early warning area. Using the data recorded by the National Research Institute for Earth Science and Disaster Resilience (NIED), we studied the effects of different grid sizes on PLUM warnings by simulating the "311 earthquake" in Japan. The simulation results obtained with the grid divisions are compared with the simulation results obtained using predefined warning areas, and the influence and applicability of the warning area division method on the warning effect are analyzed. The calculation results show that an increased grid size leads to an expanded warning range, but at the same time, unnecessary warnings are sent to some areas. Under the conditions of the "311 earthquake" in Japan, the prediction scores and precision of the 60 km and 70 km grid are higher, and the mean warning times is longer than those of other grid sizes; the overall warning results of these grids are the closest to those obtained with the predefined warning areas in Japan.
{"title":"Influence of the Warning Area Division on the Effect of the Propagation of Local Undamped Motion (PLUM) Method","authors":"Lixia Yang, Zhendong Shan, Rong Ma, L. Jing","doi":"10.1109/ICHCESWIDR54323.2021.9656459","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656459","url":null,"abstract":"It is possible to obtain a detailed estimates of the expected vibration by dividing the early warning area, to achieve an optimized early warning effect. This paper studies the influence of the warning area division on the warning effect of the the Propagation of Local Undamped Motion (PLUM) method. Japan is divided into grids with side lengths ranging from 30 km to 120 km, and each grid is considered an early warning area. Using the data recorded by the National Research Institute for Earth Science and Disaster Resilience (NIED), we studied the effects of different grid sizes on PLUM warnings by simulating the \"311 earthquake\" in Japan. The simulation results obtained with the grid divisions are compared with the simulation results obtained using predefined warning areas, and the influence and applicability of the warning area division method on the warning effect are analyzed. The calculation results show that an increased grid size leads to an expanded warning range, but at the same time, unnecessary warnings are sent to some areas. Under the conditions of the \"311 earthquake\" in Japan, the prediction scores and precision of the 60 km and 70 km grid are higher, and the mean warning times is longer than those of other grid sizes; the overall warning results of these grids are the closest to those obtained with the predefined warning areas in Japan.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"5 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":"116825025","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}
Pub Date : 2021-11-06DOI: 10.1109/ICHCESWIDR54323.2021.9656224
Bao Jiao, Hui Su, Xu Du, Bo Shi
Based upon the monitoring data from shield tunnels of 6 subways in a city, the standardized structure safety data set containing 350,000 tunnel segment data is built. The tunnel segment deformation, soil property, buried depth and surrounding environment etc. are considered in the data set. With FP-growth algorithm, association analysis of the influence factors onto the tunnel structural safety is carried out. In view of the structural defects of tunnel segments, the lift degree is selected as the index to evaluate the influences of the convergent deformation of tunnel segments, operating years and soil characteristics on segment defects. Based on the quantitative association rules of convergent deformation of tunnel segments, the influence of the independent factor on the convergent deformation under different operating years is analyzed. The association analysis results can reflect the distribution and development law of segment disease and convergent deformation, which is assistive to the operation and maintenance of Metro tunnel.
{"title":"Structural Safety Association Analysis for Operating Tunnel based on FP-growth Algorithm","authors":"Bao Jiao, Hui Su, Xu Du, Bo Shi","doi":"10.1109/ICHCESWIDR54323.2021.9656224","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656224","url":null,"abstract":"Based upon the monitoring data from shield tunnels of 6 subways in a city, the standardized structure safety data set containing 350,000 tunnel segment data is built. The tunnel segment deformation, soil property, buried depth and surrounding environment etc. are considered in the data set. With FP-growth algorithm, association analysis of the influence factors onto the tunnel structural safety is carried out. In view of the structural defects of tunnel segments, the lift degree is selected as the index to evaluate the influences of the convergent deformation of tunnel segments, operating years and soil characteristics on segment defects. Based on the quantitative association rules of convergent deformation of tunnel segments, the influence of the independent factor on the convergent deformation under different operating years is analyzed. The association analysis results can reflect the distribution and development law of segment disease and convergent deformation, which is assistive to the operation and maintenance of Metro tunnel.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"1 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":"129515808","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}
2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)
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