Transactions Hong Kong Institution of Engineers最新文献_第7页

Ultra-wideband (UWB) band-notched resonator-embedded power divider 超宽带(UWB)带陷波谐振嵌入式功率分配器

Transactions Hong Kong Institution of Engineers Pub Date : 2020-01-01 DOI: 10.33430/v27n2thie-2019-0032

Yilin Xiao, K. Song, Yuxuan Chen

引用次数: 0

Special Issue with Awarded and Shortlisted Papers from the HKIE Outstanding Paper Award for Young Engineers/Researchers 2019 特刊刊载2019年香港工程师学会杰出论文奖得奖及入围论文

Transactions Hong Kong Institution of Engineers Pub Date : 2019-12-20 DOI: 10.33430/v26n4

引用次数: 0

Virtual reality (VR) supported lift planning for modular integrated construction(MiC) of high-rise buildings 虚拟现实(VR)技术支持高层建筑模块化集成施工的电梯规划

Transactions Hong Kong Institution of Engineers Pub Date : 2019-09-27 DOI: 10.33430/v26n3thie-2019-0015

Zhiqian Zhang, W. Pan

{"title":"Virtual reality (VR) supported lift planning for modular integrated construction\u0000(MiC) of high-rise buildings","authors":"Zhiqian Zhang, W. Pan","doi":"10.33430/v26n3thie-2019-0015","DOIUrl":"https://doi.org/10.33430/v26n3thie-2019-0015","url":null,"abstract":"Modular integrated construction of high-rise buildings has shown its potential in accelerating the speed of construction, improving safety, safeguarding quality and enhancing productivity. However, due to the disruptive change to the construction process, challenges are identified to effectively plan and handle multiple lifts for hoisting heavy modules. Research on lift planning includes the development of simulation tools. However, the previous tools provided either static simulations or pre-designed animations that did not address the interactions between planners and the tools. Virtual reality (VR) offers an opportunity to build an interactive and navigable 3D environment. This paper aims to develop a userfriendly VR-supported tool for achieving effective lift planning for constructing high-rise modular buildings. First, the module lifting process and tower crane operations were analysed. Second, a VR demonstration was developed using a real-life modular building project. Third, the demonstration was used during interviews with the project team to verify the effectiveness of the developed tool. Results suggest that the tool can help optimise the site layout and lift logistics through the provided functions of collision detection and construction simulation. The findings suggest that VR-supported lift planning will contribute to ensure site safety and enhance the productivity of modular high-rise building construction.","PeriodicalId":35587,"journal":{"name":"Transactions Hong Kong Institution of Engineers","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48054977","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: 9

Stabilisation of soft clay by deep cement mixing (DCM) method – A case study 用深层水泥搅拌(DCM)法稳定软粘土-一个案例研究

Transactions Hong Kong Institution of Engineers Pub Date : 2019-09-27 DOI: 10.33430/v26n3thie-2018-0039

Yanhua Wang, H. Dou, Geng-xin Xie

{"title":"Stabilisation of soft clay by deep cement mixing (DCM) method – A case study","authors":"Yanhua Wang, H. Dou, Geng-xin Xie","doi":"10.33430/v26n3thie-2018-0039","DOIUrl":"https://doi.org/10.33430/v26n3thie-2018-0039","url":null,"abstract":"Soft ground under the sea often presents challenges for supporting seawall or reclamation without treatment if no dredging is implemented. Ground treatment is often required to improve the engineering properties of weak soils to enhance bearing capacity for supporting the intended structures. Deep soil mixing with addition of binder is one of the ground treatment methods that has been widely used in Asia and worldwide. This method was recently adopted by the authors for a practical ground improvement project in Hong Kong. This paper presents the characteristics of cement-soil mixture in the laboratory environment as well as performance of the field mixed soil using the same binder material. A detailed test programme was developed to evaluate the strength and other properties of the cement-soil mixtures by using various amounts of binder and water to binder ratios. A series of unconfined compressive strength (UCS) of the laboratory mixture were performed. The relationship of strength of the cement-soil mixture with binder dosages is developed. Test results of laboratory mixed soils were compared with those of field mixed soils. The relationship of strength between\u0000laboratory mixed soils and field mixed soils was derived. Field installation of deep mixing for the project is discussed.","PeriodicalId":35587,"journal":{"name":"Transactions Hong Kong Institution of Engineers","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45412577","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

Energy recovery from small-scale energy-from-waste (EfW) facility – Possibleapplication in Hong Kong 从小型能源废物（EfW）设施中回收能源——在香港的可能应用

Transactions Hong Kong Institution of Engineers Pub Date : 2019-09-27 DOI: 10.33430/v26n3thie-2019-0024

Cassie Chow, A. Cheung

{"title":"Energy recovery from small-scale energy-from-waste (EfW) facility – Possible\u0000application in Hong Kong","authors":"Cassie Chow, A. Cheung","doi":"10.33430/v26n3thie-2019-0024","DOIUrl":"https://doi.org/10.33430/v26n3thie-2019-0024","url":null,"abstract":"Solid waste management system is becoming a significant environmental, economic and technological challenge due to the increasing population and different waste stream. Municipal solid waste (MSW) is easy to generate but difficult to venerate. The question of whether MSW is an undervalued resource or an environmental burden is in continual debate. This paper presents an overview and structure of the current MSW management in Hong Kong and the advantages of waste diversion when the waste that normally would be delivered to the landfill is removed from the MSW. This paper also studies the technology of energy recovery which can be achieved from MSW in direct combustion as a fuel to produce power and heat, or indirectly, through waste conversion to fuel or fuel in a state of storage for future use. The necessity, rationale and application of energy recovery facilities are discussed to meet public health and environmental concerns and the public’s desire and willingness to reuse and recycle waste materials. Solid waste management serves both resource recovery and waste disposal in the public’s future challenges and opportunities for change.","PeriodicalId":35587,"journal":{"name":"Transactions Hong Kong Institution of Engineers","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43876026","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

Modelling tacit knowledge transfer in MOOCs: Simulations on the transfer process MOOC中隐性知识转移的建模：转移过程的模拟

Transactions Hong Kong Institution of Engineers Pub Date : 2019-09-27 DOI: 10.33430/v26n3thie-2018-0036

Jilan Wu, Shanshan Shang

引用次数: 0

Numerical simulation and characteristics investigation of golf ball trajectory 高尔夫球运动轨迹的数值模拟及特性研究

Transactions Hong Kong Institution of Engineers Pub Date : 2019-09-27 DOI: 10.33430/v26n3thie-2018-0040

Xi Wang, Hanyu Chen, Xiaofeng Li

{"title":"Numerical simulation and characteristics investigation of golf ball trajectory","authors":"Xi Wang, Hanyu Chen, Xiaofeng Li","doi":"10.33430/v26n3thie-2018-0040","DOIUrl":"https://doi.org/10.33430/v26n3thie-2018-0040","url":null,"abstract":"In this study, MATrixLABoratory (MATLAB)’s ode 45 method was adopted to investigate the effects of the three main factors on golf trajectory characteristics, and the preferred striking conditions were concluded. Meanwhile, the results of interaction analysis were used to assess the dependence of carry distance and peak height on each factor. Eventually, the realistic normal swing tests were conducted in a laboratory to confirm the validation and accuracy of the mathematical model. The simulated results showed that a faster club head speed generally enabled to improve carry distance. However,\u0000once the rotational speed was more than 3,000 r·min-1, the increased tendency of carry distance turned to decrease. Moreover, the decreased tendency was aggravated as the increase of club head speed and launch angle, but the low launch angle benefited to alleviate the decrease. Compared to the carry distance, peak height always rose in any conditions. Meanwhile, the combined effects of the three factors on carry distance were more obvious than on the peak height. Finally, the optimised striking strategies were concluded for golfer-slow, golfer-medium and golfer-fast, respectively.","PeriodicalId":35587,"journal":{"name":"Transactions Hong Kong Institution of Engineers","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48439999","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

Failure Behaviour and Design of I-shape Metal Brackets for Truss-out Bamboo Scaffolding 竹木脚手架工字钢支架的失效特性及设计

Transactions Hong Kong Institution of Engineers Pub Date : 2019-05-25 DOI: 10.33430/V26N1THIE-2018-0006

Chaobo Zhang, Chih-Chen Chang

{"title":"Failure Behaviour and Design of I-shape Metal Brackets for Truss-out Bamboo Scaffolding","authors":"Chaobo Zhang, Chih-Chen Chang","doi":"10.33430/V26N1THIE-2018-0006","DOIUrl":"https://doi.org/10.33430/V26N1THIE-2018-0006","url":null,"abstract":"For many decades, truss-out bamboo scaffolding has been widely used in Hong Kong for maintaining and retrofitting structures. Yet there are major concerns about the safety of truss-out bamboo scaffoldings due to the metal brackets that support them frequently failing. This paper presents an investigation into the failure behaviour of the most commonly used support for scaffoldings: the I-shape metal bracket. Uniform distributed load (UDL) tests were performed on 39 × I-shape metal brackets to analyse their mechanical behaviour and failure mechanism in different anchorage locations. The test data obtained was used to establish a finite element model for the bracket. Criteria governing the failure of brackets were then developed and calibrated against the test data. A new set of I-shape metal brackets with redesigned dimensions were then tested to verify the proposed failure criteria. Results show that the proposed failure criteria match well with the experimental results. A set of rules is therefore recommended for the limit state design of the I-shape metal bracket. The proposed failure criteria and design rules could be used to design I-shape metal brackets for the industry that offer greater safety and reliability.","PeriodicalId":35587,"journal":{"name":"Transactions Hong Kong Institution of Engineers","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45142082","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

Trenchless construction of Phase IIIA District Cooling System (DCS) by TBM pipejacking and hand-dug tunnelling on Kai Tak Development : Part II – The challenges 启德发展计划第三期第二期区域供冷系统的隧道掘进机顶管及手挖隧道非开挖施工:第二部分-挑战

Transactions Hong Kong Institution of Engineers Pub Date : 2019-05-25 DOI: 10.33430/V26N1THIE-2017-0002

Wilson W S Mok, Victor K Lo, Germaine T M Chau, Louis Y M Lau

引用次数: 0

Stability analysis of strain-softening slopes based on the gravity increase method 基于重力增加法的应变软化边坡稳定性分析

Transactions Hong Kong Institution of Engineers Pub Date : 2019-05-25 DOI: 10.33430/V26N1THIE-2017-0031

Wenmin Yao, Chong Ma, Zhang Wang, Xiaolong Chen

{"title":"Stability analysis of strain-softening slopes based on the gravity increase method","authors":"Wenmin Yao, Chong Ma, Zhang Wang, Xiaolong Chen","doi":"10.33430/V26N1THIE-2017-0031","DOIUrl":"https://doi.org/10.33430/V26N1THIE-2017-0031","url":null,"abstract":"With traditional slope stability analysis methods, it is difficult to accurately describe the progressive failure process and dynamic variation law of slope stability. The strain-softening constitutive model was therefore used to simulate the progressive failure process of a strain-softening slope based on the gravity increase method (GIM), with the displacement interface employed to determine the sliding surface. A sensitive analysis of the characteristic parameters within the softening stage was then conducted. \u0000\u0000The results are as follows: \u0000There are similar space-time evolution laws of residual strength factor and shear strain increment, with failure starting from the slope toe and extending gradually. The sliding surface of strain-softening slopes is located between that of the slope with peak strength and the sliding surface of the slope with residual strength. The stability coefficient shows an exponential growth trend with the increase of residual cohesion and residual plastic shear strain threshold, with a positive linear correlation between the residual friction angle and stability factor. The residual friction angle is the most sensitive factor in slope stability, followed by the residualcohesion, with the residual plastic shear strain threshold being the least sensitive.","PeriodicalId":35587,"journal":{"name":"Transactions Hong Kong Institution of Engineers","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44402281","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