Academic Journal of Architecture and Geotechnical Engineering最新文献

{"title":"A construction process for hoisting, precise positioning and temporary fixation of a steel-concrete composite segment on a long-span steel-concrete hybrid girder","authors":"","doi":"10.25236/ajage.2023.050306","DOIUrl":"https://doi.org/10.25236/ajage.2023.050306","url":null,"abstract":"A steel-concrete composite segment of a steel-concrete hybrid girder features a complex structure and generally encounters difficulties in positioning and temporary fixation. In view of this, this study explored the layout of survey control networks and put forward a method for observing deformation of a concrete box girder at the cantilever end at the steel-concrete composite segment based on Hanzhuang Grand Canal Bridge, Tai’erzhuang District, Zaozhuang City, Shandong Province, China. Moreover, a construction process for hoisting the steel-concrete composite segment was proposed and a temporary fixation device for the segment used with a hanging basket was developed. The key sequences of temporary fixation were researched, which could provide practical and technological reference for similar engineering.","PeriodicalId":441364,"journal":{"name":"Academic Journal of Architecture and Geotechnical Engineering","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135267600","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}

{"title":"Study on wave velocity characteristics and compressive strength of concrete under different water pressure","authors":"Xu Wei, Li Haopeng, Li Xiaoyuan","doi":"10.25236/AJAGE.2021.030108","DOIUrl":"https://doi.org/10.25236/AJAGE.2021.030108","url":null,"abstract":"In order to study the internal damage and static compressive strength of concrete under different water pressures, the wave velocity test and compressive test were carried out by NN-4B non-metallic ultrasonic testing analyzer and electro-hydraulic servo testing machine. The test results show that the high water pressure of concrete has an adverse impact on the development of its internal structure, and with the increase of high water pressure level, the slower the longitudinal wave passes through the specimen, the more serious the damage and deterioration of concrete, and the compressive strength decreases gradually with the increase of water pressure.","PeriodicalId":441364,"journal":{"name":"Academic Journal of Architecture and Geotechnical Engineering","volume":"307 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133843831","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}

{"title":"Air Pollution Control for a Hot Mix Asphalt Plant","authors":"Tianyang Liu","doi":"10.25236/AJAGE.2021.030109","DOIUrl":"https://doi.org/10.25236/AJAGE.2021.030109","url":null,"abstract":"The report explores how to reduce pollution by improving the emission control system in Hot Mix Asphalt (HMA) plants. The majority of emissions come from the combustion of fuel and particulate matter (PM) diffusion. The key finding is that combining a wet scrubber system and baghouse system will reduce the major pollutants significantly. Thousands of HMA plants across the country are in operation every day in rural, suburban, and urban areas, affecting all neighbors in their local communities. How an asphalt plant impacts the neighborhood and the environment mainly depends on their sustainable operation. Asphalt plant emissions are very low and getting lower due to innovative control systems and manufacturing technology. The objective of this report is to exppore the emission control system of a Hot Mix Asphalt plant. The main point is how to improve the scrubber system and baghouse filter for controlling criteria pollutants in the Hot Mix Asphalt plant during production to reduce the emissions.","PeriodicalId":441364,"journal":{"name":"Academic Journal of Architecture and Geotechnical Engineering","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128134526","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}

{"title":"Quantitative determination of corrosion status of rebar by electrochemical parameters","authors":"M. He, Xin‐rong Li","doi":"10.25236/AJAGE.2021.030106","DOIUrl":"https://doi.org/10.25236/AJAGE.2021.030106","url":null,"abstract":"In this paper, the relationship between electrochemical parameters and corrosion status of rebar was analyzed by measuring macro-current and potential difference of self-made anode ladder monitoring system under different environmental conditions.Laboratory tests show that the anode ladder monitoring system can better judge the corrosion status of steel bars and provide a basis for structural durability evaluation and remaining life prediction. Reinforced concrete is the most widely used building material in engineering. The durability of reinforced concrete structure gradually declines under the long-term action of unfavorable factors in using environment. At present, there are many \"models\" for predicting the durability life of concrete published in the world, and more researches are being carried out. The most studied \"model\" is the \"model\" related to corrosion, especially the relationship between reinforcement corrosion and concrete durability, is the most common and in-depth research. The problem of durability of reinforced concrete structures caused by corrosion of reinforcing bar has been paid more and more attention in engineering field. Early detection and diagnosis of reinforcement corrosion is an important prerequisite for durability evaluation, remaining service life prediction and maintenance scheme selection of reinforced concrete structures.The development of accurate and reliable on-site monitoring technology of reinforcement corrosion has become the focus of scholars at home and abroad. In order to monitor the corrosion of reinforcement in concrete, some electrochemical parameters need to be measured by sensors. These electrochemical parameters include: potential distribution, macrocurrent, concrete resistance, and so on. Among them, the measurement of macrocurrent is a relatively simple and easy method, which has been widely used in the measurement of reinforcement corrosion. Using this method, in recent years, many countries have developed anodic sensor systems for monitoring reinforcement corrosion, a typical non-destructive monitoring system for the embedded durability of TRAPEZOIDAL anode ladder concrete structure is developed by the Institute of Civil Engineering, Aachen University of Technology, Germany, the corrosion degree and depth of steel bar in concrete can be measured for a long time by embedding steel bar sensors with different depths in concrete, which has been put into engineering application in many countries. In this paper, a self-made multi-group anode ladder monitoring system is designed in the laboratory. The corrosion status of each anode steel bar and the change of electrochemical parameters are obtained by using the method of half-cell potential test in the environmental solution of different concentrations, the criterion of electrochemical parameters to determine the corrosion status of rebar was obtained.","PeriodicalId":441364,"journal":{"name":"Academic Journal of Architecture and Geotechnical Engineering","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122082213","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}

{"title":"Environmental impact study in application of a lake-shore holiday village planning","authors":"Zhu Bai","doi":"10.25236/AJAGE.2021.030105","DOIUrl":"https://doi.org/10.25236/AJAGE.2021.030105","url":null,"abstract":"A new holiday village will be located by the Fleesensee lake of Silz district in Germany. It is proposed to serve travelers and citizens for boating and water sports. The existing planning plan will interrupt local environment due to an indiscriminately transformation of the landscape. Though Environment Landscape Convention (ELC) provides designers a reference for planning policies and tools, there is still a gap between researches and planning practices. Planning plans are always carried out based on designer’s personal inclination into the landscape and results in an impossible prediction of change for the landscape and locals. This paper presents a process of using the Environmental impact study (EIS) as a tool to set up a temperate planning plan for the holiday village. Two steps were evolved: landscape interpretation and landscape evaluation. In the first step, multidisciplinary data of the site was collected. Parameters consist of nature and cultural elements were mapped out. Based on the characteristics and identities of the landscape, the second step was rating, overlaying and analyzing parameters according to their protective function. By calculating the environmental net loss and gain, the validity and reliability of the study could be verified. The compliment of EIS can explicitly demonstrate a reasonable decision making process based on respecting existing site condition. The result will indicate the protective area and the new potential design boundary of the site. From the results of the study, a new planning boundary has been put froward to compensating ecology loss by creating new habitats and corridors. Two goals have been attained by the new planning plan: (1) minimal deconstruction of the site; (2) 13.3 ha of additional biotopes was created.","PeriodicalId":441364,"journal":{"name":"Academic Journal of Architecture and Geotechnical Engineering","volume":"268 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115982687","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}

{"title":"Thinking about the Construction of Green Building Innovation Training Center Based on the Integration of Industry and Education","authors":"G. Shan, Wang Fangfang, M. Ming","doi":"10.25236/AJAGE.2021.030104","DOIUrl":"https://doi.org/10.25236/AJAGE.2021.030104","url":null,"abstract":"In response to the national macro strategy of green sustainable development, to achieve the goal of carbon peak by 2030 and carbon neutral by 2060, the country vigorously develops green buildings, and colleges and universities actively cultivate green building technical talents. Taking the construction of green building innovation training base in Chengdu University as an example, this paper focuses on the objectives and ideas, construction content and implementation path of the construction project of green building innovation training center, as well as the characteristics and highlights of the project, in order to provide a useful reference for the construction of green building training base in Colleges and universities.","PeriodicalId":441364,"journal":{"name":"Academic Journal of Architecture and Geotechnical Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115841286","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}

{"title":"Prediction of dam horizontal displacement based on CNN-LSTM and attention mechanism","authors":"Yu-hong Liu, Xiao Feng","doi":"10.25236/AJAGE.2021.030103","DOIUrl":"https://doi.org/10.25236/AJAGE.2021.030103","url":null,"abstract":"Aiming at the characteristics of dam safety monitoring data sequence with few samples, short sequence and nonlinearity, a dam horizontal displacement prediction method based on attention mechanism, convolutional neural network (CNN) and long short-term memory (LSTM) is proposed. This method can reduce the loss of historical information and improve the prediction accuracy. First, the missing values are supplemented by linear interpolation to improve the integrity of the data. Then the abstract feature data extracted by CNN is mapped to the predicted value of LSTM, and then optimized through attention mechanism. Finally, the model is trained and verified with the monitoring data of a concrete gravity dam in Chongqing as a sample. Experimental results show that the root mean square error (RMSE), mean absolute percentage error (MAPE) and fit (R2) of the CNN-LSTM hybrid model based on attention mechanism are 0.3882, 0.7121% and 0.9543, respectively. The prediction accuracy of the new model is better than the CNN-LSTM model and the LSTM neural network model.","PeriodicalId":441364,"journal":{"name":"Academic Journal of Architecture and Geotechnical Engineering","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122176548","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}

{"title":"Formation mechanism of hexagonal structure of basalt columnar joints based on Mechanics of Materials and infinitesimal method","authors":"Zirong Wang, Siyun Zhou","doi":"10.25236/AJAGE.2021.030102","DOIUrl":"https://doi.org/10.25236/AJAGE.2021.030102","url":null,"abstract":"The perfect hexagon showed by columnar jointed basalt gets great public appeal. However, the accurate illustration was not given. A new explanation, which has rigid calculation, is proposed here for their origin. With the cooling of basalt, the distribution of stress changes while the normal stress equal to the tensile strength of basalt. Using an equation as τθ=τf, where τθ is the force tangentially acting on the unit shear boundaries and τf represents the shear strength of basalt, to indicate the condition of the shear fracture. The result of numerical calculation shows that cleavages appear at angles of ±59.53° with the σ1, which effectively illustrate why the columnar jointed occur in conjugate pairs with ~120° angle between cleavages. The angle depends on the internal friction angle, the cohesive force, the tensile strength and Poisson’s ratio of basalt. Other factors on the sides and diameter of columnar jointed, such as the velocity of cooling and components of magma, will be deeply researched in our future work.","PeriodicalId":441364,"journal":{"name":"Academic Journal of Architecture and Geotechnical Engineering","volume":"48 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122279534","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}

{"title":"Research on Anchorage of GFRP Anchor Bolts and Heads","authors":"Tong Wang, Zhao-Xiang Huang, Xiang Zhang","doi":"10.25236/AJAGE.2021.030101","DOIUrl":"https://doi.org/10.25236/AJAGE.2021.030101","url":null,"abstract":"GFRP is an abbreviation of Glass Fiber Reinforced Polymer. It is an inorganic non-metallic material made of glass fiber reinforced material, synthetic resin as matrix material, and compounded by a certain process. Although the glass fiber reinforced polymer anchor can fundamentally solve the problem of poor corrosion resistance of the steel bar anchor, in the anchor system, the force on the surface layer or the waist beam needs to be transmitted to the shaft through the anchor head. At present, the pull-out strength of domestic GFRP anchors is far away from the tensile strength of GFRP tendons. This may cause the anchorage system of anchors to fail due to anchorage failure, and the tensile strength of GFRP tendons cannot be fully exerted. When ordinary clip-type anchorages are used, there is a huge clamping force on the ribs in the anchorage zone, which may result in the shear failure of ribs.Based on this, this article uses a high-strength impregnated reinforcement material to carry out the tensile failure test of a GFRP anchored anchorage with a diameter of 18cm. The study found that the use of high-strength reinforced concrete can make the GFRP anchor achieve the maximum tensile strength, and with the increase of curing time, the ability of the high-strength reinforcement to limit the displacement of the anchorage end is stronger.","PeriodicalId":441364,"journal":{"name":"Academic Journal of Architecture and Geotechnical Engineering","volume":"459 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116087222","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}

{"title":"Research on mechanical behavior of rock breaking of abnormal cutter based on PFC numerical simulation","authors":"Bin Wang, Yao-wu Li","doi":"10.25236/ajage.2023.050404","DOIUrl":"https://doi.org/10.25236/ajage.2023.050404","url":null,"abstract":": Cutter wear is an important factor that restricts construction efficiency and cost in TBM tunneling, and abnormal cutter damage will even cause TBM jamming, seriously affecting the construction schedule. Therefore, using PFC particles flow numerical simulation method, two simulation schemes which will possibly cause cutter abnormal damage are set up, researching the mechanics behavior and efficiency of rock breaking. Otherwise, the influence of penetration, rock mass strength and parameters of the cutter itself on cutter force is also analyzed, and the corresponding engineering suggestions are provided in this article","PeriodicalId":441364,"journal":{"name":"Academic Journal of Architecture and Geotechnical Engineering","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115458304","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}