Prestressed technology is one of the 10 new technologies in construction industry, which has its unique advantages and is an important professional technology in engineering field
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Our country has formed a relatively complete system in the design theory, calculation method, member series, structural system, tension anchorage system, prestressed technology, prestressed tendons and concrete materials of prestressed concrete and prestressed steel structure
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Hereby classify and sort out the audio and video and articles related to prestressed technology, and don’t worry about the lack of prestressed technology articles or engineering examples in the future
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Collect them quickly and learn slowly! Overview of prestress technology N0.1 past, present and future prestress Chen binlei structural director and chief engineer of Beijing Architectural Design and Research Institute Co., Ltd
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click here to view the full text of the report Abstract: This paper reviews the development history of international prestress and Chinese prestress, and describes the Bank of America project designed by master Lin Tongyan Xia, the most famous Unfinished Bridge – ruck bridge, gold bridge designed by Wu Qiying and Wolfsburg stadium in Germany
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This paper introduces the application of prestressed technology in the field of modern building structure, including concrete: Daxing International Airport, 915 office building of National Audit Office, student activity center of Beijing Jianzhu University, Shanghai International Convention and Exhibition Center, Huainan national fitness center, Beijing fresh agricultural products circulation center; multi-storey and long-span: Shanghai Pudong port logistics park, Anhui Hefei Zhongke Mei Lingling low temperature equipment production plant; prefabricated assembly: China first automobile group assembly parking building, Vanke Chengdu Shuangliu Airport logistics warehouse; special structure: Qingdao LNG storage tank; steel structure: FOSHAN CENTURY LOTUS Sports Center, Guangzhou new railway station, Shenzhen Bao’an stadium, Xuzhou Olympic Sports Center Stadium, fast, Ordos Yijinhuoluo banner Sports Center, Suzhou sports center Sports Center Stadium, Zaozhuang Sports Center, national speed skating hall, etc
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From four aspects of material, design, construction and application, this paper expounds the broad development prospect of prestressed technology in the future
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Engineers should inherit and carry forward prestressed culture and structural spirit
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N0.2 key points of modern prestress technology progress Li Chenguang, chief engineer of Beijing Construction Engineering Research Institute Co., Ltd.Abstract: This paper expounds the progress of modern prestress technology from four aspects, including: 1) multi-level, wide coverage and mature prestress standard system such as national standard, industry standard, association standard and landmark; 2) prestressed concrete post tensioned structure (bonded prestressed concrete) (3) prestressed steel structure engineering (string structure, suspen dome structure, cable dome structure, suspension structure, cable-stayed structure, prestressed truss structure); 4) new technology and progress (CFRP slab prestressed system, electrical insulation prestressed system (EIT))
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N0.3 thinking on the healthy development of prestressed concrete structure in China Professor Meng Shaoping of Southeast University Abstract: Based on the development background of prestressed concrete technology in China (introduction and learning → tracking and catching up → innovation and transcendence), combined with the current industry development and policy changes (in 2016, the Ministry of construction cancelled the qualification of prestressed professional contracting), this paper aims at how to maintain the charm of prestressed concrete structure To lead the healthy development of prestressed concrete structure in China, put forward personal views and opinions
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It also introduces the innovative application of prestressed concrete structure in recent years, the application of prestressed technology in the industrialization of concrete structure building, and the existing problems and Countermeasures in the development of prestressed concrete structure
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2、 Prestressed structure design and construction N0.1 long span stadium cable supported grid structure cable construction new technology Guo Zhengxing professor of Southeast University, doctoral supervisor content abstract: This paper briefly introduces the cable supported grid structure of Nanjing Olympic Sports Center Stadium in 2004, Shenzhen Bao’an stadium in 2011, Zhejiang Yueqing Sports Center Stadium in 2012 and Suzhou Sports Center Stadium in 2016 The construction technology of grid structure cable; the construction process of cable supported grid structure cable system of Zhengzhou Olympic Sports Center Stadium is described in detail, leading to the technical difficulties and innovation of cable construction; finally, the construction difficulty and construction process of dense column cable supported grid steel roof of Qatar football World Cup Education City Stadium are introduced in detail
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Xue Suduo, Dean and professor of School of architectural engineering, Beijing University of technology content abstract: This paper introduces that many existing prestressed space structures use ring cables, and the ring cable as the key component is not conducive to the continuous collapse resistance of the structure, and the ring cable tension greatly increases the difficulty of structural design and construction
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In order to solve the above problems, a new system of prestressed cable supported structure without loop cables is proposed in the report
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The classification, structural characteristics, theoretical and experimental research progress of the new system are introduced in detail, and the feasibility of engineering application of the new system is discussed
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Based on the research results, the report points out that the new system of prestressed cable supported structure without loop cable has good progressive collapse resistance performance, the cable force is significantly reduced, and it is easy to manufacture and construct, which has strong engineering practice feasibility
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Design points of N0.3 longitudinal cable supported transverse cable two-way suspension structure — Taking Shijiazhuang International Convention and Exhibition Center as an example Therefore, it is necessary to ensure that the position of the upper and lower ends of the vertical bar is relatively fixed under various working conditions of construction tension and normal use
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At the same time, the out of plane stability of the longitudinal suspension supporting the transverse suspension truss needs the help of the transverse suspension
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Therefore, the primary and secondary suspension structures are mutually established conditions, resulting in interaction coupling
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Due to the requirements of the construction site, the main suspension cable forms a compression bar with a length of more than 100 meters, and the compression bar bears a force of 14000 kn
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It is necessary to conceive a way to ensure the stability of the compression bar
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Therefore, the construction sequence and main control variables need to be clearly defined in the structural design, so that the structure can be established
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This kind of suspension structure is first used in practical engineering in China
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Design technology and engineering application of N0.4 spoke cable type Ferris wheel Song Tao, chief engineer and researcher of engineering consulting and Design Institute of China Academy of Building Sciences content abstract: This paper introduces the composition and forms of Ferris wheel (rigid disc type, spoke cable type, combination of rigid arm and wheel amplitude cable type, fixed turntable type), and the main points of design method of Ferris Wheel: 1) combining structural design with mechanical design, 2) combining structural design with mechanical design Considering the structural performance under wind load, 3) the position of main shaft in the structural stress, 4) vibration reduction measures, 5) rescue measures, 6) installation method and car cabin; combining with three engineering examples of Tianjin Cihai Bridge Ferris wheel, Weifang Binhai New Area Bailanghe bridge Ferris wheel and Beijing 208 m Chaotian wheel, this paper systematically introduces the design points and difficulties of Ferris wheel
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N0.5 research on seismic performance of prestressed orthogonal Glulam shear wall structure he Minjuan professor of Tongji University Click here to view the full text of the report Abstract: through experiments and theoretical analysis, the lateral resistance performance of four kinds of orthogonal Glulam (CLT) shear walls, such as whether the story is continuous or not and whether there are seams in the width direction, are studied, and the failure characteristics of different walls are revealed The concept of prestressed CLT shear wall is proposed to test the lateral force resistance performance of different prestressed CLT shear walls, and the seismic performance of this kind of structure system is analyzed
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Based on the test, the long-term performance degradation law of CLT shear wall under different prestressed levels is analyzed.
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