2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)最新文献_第6页

Study on impact resistance of fiber-reinforced recycled concrete slab based on ABAQUS 基于ABAQUS的纤维增强再生混凝土板抗冲击性能研究

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/ICHCESWIDR54323.2021.9656466

Tianbei Kang, Liwei Jin, Songxu Li, J. Zhou, A. Liu

引用次数: 0

Research on the small strain stiffness behavior of soft clay under complex stress path 复杂应力路径下软土小应变刚度特性研究

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/ICHCESWIDR54323.2021.9656469

Kaiping Xu

引用次数: 0

Study on a long-term temperature stress of a low-heat cement concrete high arch dam 低热水泥混凝土高拱坝长期温度应力研究

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/ICHCESWIDR54323.2021.9656486

Guo Li, Yaosheng Tan, Yu Hu, Chunfeng Liu

{"title":"Study on a long-term temperature stress of a low-heat cement concrete high arch dam","authors":"Guo Li, Yaosheng Tan, Yu Hu, Chunfeng Liu","doi":"10.1109/ICHCESWIDR54323.2021.9656486","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656486","url":null,"abstract":"The structure of high arch dams is complex and the overall stress level is high. Therefore, the temperature field and stress field of high arch dams have always been the focus of related research. This article starts with the monitoring data, combined with simulation calculation, to study the long-term temperature stress change law of the high arch dam with low-heat cement concrete in the whole dam. After calculation and analysis, the following conclusions are drawn: (1) The use of low-heat cement concrete significantly reduces the difficulty of temperature control, and the maximum temperature of the entire dam is controlled within 27°C; (2) The internal temperature of the low-heat cement concrete arch dam is relatively stable after the arch is sealed. 2-5 years after the arch is closed, the external environment temperature will increase periodically; (3) With the passage of time, the overall tensile stress of the arch dam gradually decreases, and the concrete tensile stress of the main body of the dam is within the range of the 2.0 safety curve during the whole life cycle. There is a certain safety margin. The selection of the new low-heat cement concrete can effectively reduce the difficulty of early maximum temperature control in the project, and the residual hydration heat release effect in the later period is weak. The long-term tensile stress of the concrete in the project is in a safer position, which can make the construction more difficult. The selection of materials for arch dam projects can be used for reference.","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":"125277926","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

Research on Stability and Prevention Measures of Weathered Deposit Slope 风化堆积物边坡稳定性及防治措施研究

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/ICHCESWIDR54323.2021.9656311

X. Fu, K. Yuan, Dongge Chen, Wenjie Du, Hongru Mei

引用次数: 0

Research on the relationship between concrete linear expansion coefficient and gate pier’s endurance to cold shock 混凝土线膨胀系数与闸墩抗冷冲击性能关系的研究

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/ICHCESWIDR54323.2021.9656232

Zhongyuan Zhu, Yong Hu, S. Qiang, Hongshi Zhang, Chengpeng Zhang

{"title":"Research on the relationship between concrete linear expansion coefficient and gate pier’s endurance to cold shock","authors":"Zhongyuan Zhu, Yong Hu, S. Qiang, Hongshi Zhang, Chengpeng Zhang","doi":"10.1109/ICHCESWIDR54323.2021.9656232","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656232","url":null,"abstract":"When the large-volume concrete structure of hydraulic engineering encounters a sudden drop in ambient temperature, the instantaneous temperature stress can easily cause the surface of the large-volume concrete to crack. Taking concrete pier as an example, ANSYS software is used in this paper to simulate the influence process of rainstorm or flood release, and sudden temperature drop on the surface tensile stress of the structure. At the same time, the variation range of tensile stress on pier surface produced by different linear expansion coefficients, temperature drops, and pier thickness is calculated. It is found that in the case of a sudden drop in ambient temperature, the thickness of the gate pier has little effect on the change of surface tensile stress, while the linear expansion coefficient has a great effect. Furthermore, the ability of concrete piers with different linear expansion coefficients to withstand heavy rain, flood discharge, and sudden temperature drop is obtained. The results can provide a certain reference for the selection of pier concrete raw materials under different climates and different reservoir water temperature conditions.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"37 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":"131466128","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

Magnetism-mechanics Performance of Magnetically Controlled Shape Memory Alloy and Application For Active Control System 磁控形状记忆合金的磁力学性能及其在主动控制系统中的应用

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/ICHCESWIDR54323.2021.9656187

G. Weng, Junfeng Ding, Yajun Wu, Yang Liu

{"title":"Magnetism-mechanics Performance of Magnetically Controlled Shape Memory Alloy and Application For Active Control System","authors":"G. Weng, Junfeng Ding, Yajun Wu, Yang Liu","doi":"10.1109/ICHCESWIDR54323.2021.9656187","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656187","url":null,"abstract":"To control the dynamic stability of light steel structure, magnetism-mechanics performance of magnetically controlled shape memory alloy (MSMA) was studied, the MSMA actuator and MSMA active control system was developed. The material properties of MSMA related to magnetism and mechanics was studied, at the same time, the influence of the Ni-Mn-Ga contained in MSMA on the magnetism-mechanics properties was analysed, Ni53Mn25Ga22 was selected to build the design theoretical basis of MSMA actuator. Taking three MSMA rods with a size of 4x8x45mm as the core element, a new type of actuator was developed, and the corresponding magnetism-mechanics performance test was carried out. The key factors such as magnetic field, de-formation rate, preloading, active control force, etc. were determined, as well as the mathematical models with the changes of parameters were established. The controlled object (steel truss model structure), MSMA actuator, control algorithm, data acquisition system, etc. constitute the MSMA active control system. Two MSMA actuators are installed on the steel truss model structure, under the excitation of sine wave, the dynamic response of the steel truss model structure with the MSMA active control system was tested, and the results was compared with uncontrolled; The results show that the acceleration response of the steel truss model structure equipped with the MSMA active control system decreased by about 25%, and the displacement response decreased by about 20%. The active control system with MSMA actuator as the core component can better realize the dynamic stability control of steel structure.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"57 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":"132587044","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

Analysis of Heightened Dam Working Behavior During Impoundment Process 蓄水过程中高坝工作特性分析

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/ICHCESWIDR54323.2021.9656388

SiChao Shen, Zhiqiang Xie, Y. Qi, Xi Qin

{"title":"Analysis of Heightened Dam Working Behavior During Impoundment Process","authors":"SiChao Shen, Zhiqiang Xie, Y. Qi, Xi Qin","doi":"10.1109/ICHCESWIDR54323.2021.9656388","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656388","url":null,"abstract":"In the second half of 2017, the Danjiangkou Reservoir carried out an experimental impoundment. Based on this impoundment, the three-dimensional finite element simulation technology is applied to simulate the temperature and stress distribution during the whole process from concrete placement to trial impoundment completion. The working behavior of the dam including change of temperature, stress, deformation and the open degree of joint surface during the impoundment process is emphatically analyzed and compared with the measured results. The results show that the whole dam section deforms downstream under the combined effect of the water rising and temperature decreasing during the impoundment process. The calculated results are consistent with the measured values. The temperature and stress in the dam body are not affected obviously during the impoundment process, but the surface temperature drops obviously, stress increases significantly on the surface and downstream slopes. The vertical joint faces of dam tend to be closed.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"19 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":"133215171","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

Using modified biochar as a physical-chemical conditioner for waste activated sludge dewatering 改性生物炭作为废液活性污泥脱水的理化调理剂

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/ICHCESWIDR54323.2021.9656214

Wenjian Gao, Lei Song

{"title":"Using modified biochar as a physical-chemical conditioner for waste activated sludge dewatering","authors":"Wenjian Gao, Lei Song","doi":"10.1109/ICHCESWIDR54323.2021.9656214","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656214","url":null,"abstract":"The development of safe, efficient, environmentally friendly and cheap skeleton particles is a hot spot in the study of sludge reduction and resource utilization in the field of environmental engineering in my country. In this study, we prepared for the first time a biochar P-BC modified with polyaluminum chloride as a physical and chemical conditioning agent to be used in the field of sludge dewatering. The sludge moisture content, sludge specific resistance, and sludge compressibility coefficient are used to evaluate the sludge dewatering effect of P-BC. When the dosage of P-BC is 1.25 g/gTSS, WC drops to 79.65±3%, and SRF drops to 7.73±0.1×1012 m/kg, indicating that the sludge dewatering performance has been significantly improved. Through analysis of changes in Zeta potential, sludge particle size and distribution of extracellular polymer components before and after sludge pretreatment, the mechanism of P-BC promotion of sludge dewatering was explored, and it was proved that P-BC can neutralize sludge. The negative charge in the sludge promotes the agglomeration of sludge particles, promotes the conversion of the bound water inside the EPS to free water, and effectively improves the sludge dewatering effect.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"76 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":"134309044","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

Mechanical Characteristics of Multi-span Simply Supported Bridge-track Systems due to Braking Force 制动力作用下多跨简支桥-轨道系统的力学特性

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/ICHCESWIDR54323.2021.9656335

Tao Zhou, Hao Ge, Haiqing Yan

{"title":"Mechanical Characteristics of Multi-span Simply Supported Bridge-track Systems due to Braking Force","authors":"Tao Zhou, Hao Ge, Haiqing Yan","doi":"10.1109/ICHCESWIDR54323.2021.9656335","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656335","url":null,"abstract":"To investigate the mechanical characteristics of different track systems on multi-span simply supported bridge under braking load, the spatial bridge-track interaction finite element models considering multi-layer nonlinear interaction were established, and the forces and displacements of different bridge-track systems under braking load were analyzed. The following results are demonstrated based on the research: Under the braking force load, the distribution laws of rail additional stress of different tracks on multi-span simply supported bridge are similar. The position of rail maximum additional stress changes with the variation of the loading area, and the maximum additional stress appears at the loading end. The rail fastener of the ballasted track and double block ballastless track will slide under the action of braking force. Longitudinal forces of piers of bridges with ballast track and CRTS I double-block ballastless track are greater than that with CRTS II slab ballastless track when the loading position is the same. It is recommended that the design of bridge piers needs to take into account of the type of track laid on the bridg","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"25 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133071219","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

Study on Seismic Isolation of Electrical Transformer by Lead Rubber Bearing 铅橡胶支座对变压器隔震性能的影响研究

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/ICHCESWIDR54323.2021.9656301

Sheng Li, Z. Lu, Y. Zhang, Kewei Luo, Haibo Wang, Xiaotong Gou

引用次数: 0