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Experimental research on the mechanical property of prestressing steel wire during and after heating

ZHENG Wenzhong, HU Qiong, ZHANG Haoyu

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 2, Pages 247-254 doi: 10.1007/s11709-007-0031-1

Abstract: The mechanical property of prestressing steel wire during and after heating is the key factor in theTensile experiment of 16 prestressing steel wires ( = 1770 N/mm, = 5 mm, low relaxation of stress) at

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monitoring of the strengthening construction of a segmental box girder bridge and field testing of external prestressing

Ali Fadhil NASER, Zonglin WANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3, Pages 308-320 doi: 10.1007/s11709-012-0140-3

Abstract: The objectives of this study are to monitor the construction process of the external prestressing tendonsa field load test to measure the strain and the deflection of the anchorage devices of the external prestressingThe monitoring process of the external prestressing tendons construction includes inspecting the cracksTherefore, there is no damage during the construction and the tensioning of the external prestressingsufficient strength, and the working state is good after the tension forces are applied to the external prestressing

Keywords： prestressed concrete box girder monitoring external tendons strain deflection

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The 32 m span box girder prestressing effect monitoring and creep camber control for Wuhan-Guangzhou

Song Jinxi

Strategic Study of CAE 2009, Volume 11, Issue 1, Pages 60-66

Abstract: case for study, the online montoring and numerical analysis for 32 m concrete prestressed box girder prestressing

Keywords： Wuhan-Guangzhou passenger express line 32 m box girder prestressing effect monitoring creep camber

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A numerical study of prestressed high strength steel tubular members

Michaela GKANTOU, Marios THEOFANOUS, Charalampos BANIOTOPOULOS

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1, Pages 10-22 doi: 10.1007/s11709-019-0547-1

Abstract: As anticipated, prestressing enhances the load-bearing capacity for the tensile members, whereas it is

Keywords： finite element prestressing tubular members grout high strength steel

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Investigation of mechanical performance of prestressed steel arch in tunnel

Yaqiong WANG, Yunxiao XIN, Yongli XIE, Jie LI, Zhifeng WANG

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 3, Pages 360-367 doi: 10.1007/s11709-017-0429-3

Abstract: In the traditional tunneling method, the steel arch are often adopted to support surrounding rock to ensure the structural stability. If the steel arch is prestressed in time, tunnel support can effectively prevent the development of rock crack, thereby increasing the overall strength of tunnel support and suppress the deformation of the surrounding rock. Based on the mechanical model of steel arch established in this paper, the stress distribution of steel arch is investigated via the numerical simulation method, and the impact on surrounding rock is also analyzed. Through a field test, the rules of the arch strain distribution are observed and discussed. The results show that the prestressed steel arch structure can provide effective support and the stress gradually decreases from stress point to another arch springing. Furthermore, the stress distribution applied by the prestressed steel arch on the surrounding rock is uniform in a certain extent, and it is suggested that this construction method utilizing the prestressed steel arch to squeeze surrounding rock is feasible from a theoretical view.

Keywords： tunnel support prestressing force steel arch numerical analysis

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The Thought of Conception Reinforcement and Its Engineering Application

Duan Jingmin,Qian Yongjiu,Zhang Fang,Zeng Xiantao

Strategic Study of CAE 2005, Volume 7, Issue 8, Pages 22-25

Abstract: The paper describes the whole prestressing reinforcement technology, and expounds an engineering example

Keywords： engineering structure conception reinforcement whole prestressing reinforcement technology

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Reinforcement design of anchor blocks for external tendons

Hong Hao,Tong Yuqiang ,He Zhiqi,Liu Zhao

Strategic Study of CAE 2013, Volume 15, Issue 8, Pages 95-98

Abstract:

Reinforced blocks are common anchorage forms for external tendons. However, there was no mature design method. Through finite element analysis, the paper revealed that the tensile stress concentration was caused by three typical local actions. On this basis, three equations for calculating resultant forces of these local actions were formulated. Thus a quantitative reinforcement design method of anchor blocks was proposed. Finally, an anchor block of the Fourth Nanjing Yangtze River Bridge was presented as a design example to demonstrate the effectiveness and convenience of the proposed method.

Keywords： anchor block external prestressing reinforcement design bursting force cantilever action tie-back

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Shear behavior of ultra-high-performance concrete beams prestressed with external carbon fiber-reinforced polymer tendons

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 6, Pages 1426-1440 doi: 10.1007/s11709-021-0783-z

Abstract: The shear span to depth ratio had a significant influence on the shear capacity, and the effective prestressing

Keywords： beam external prestressing ultra-high-performance concrete fiber-reinforced polymers shear behavior

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Study on Strengthening Technique with Prestressed PBO Fiber Sheets

Wu Zhishen,Iwashita Kentaro,Niu Hedong

Strategic Study of CAE 2005, Volume 7, Issue 9, Pages 18-24

Abstract: To take full advantage of FRP laminates, more gains can be achieved by prestressing the fibers prior

Keywords： fiber reinforced polymers (FRP) PBO fiber sheet retrofit/repair bond prestressing anchorage

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The design philosophy and bridge’s technical innovation of Hong Kong-Zhuhai-Macau Bridge

Meng Fanchao,Liu Minghu,Wu Weisheng,Zhang Gejun and Zhang Liang

Strategic Study of CAE 2015, Volume 17, Issue 1, Pages 27-35

Abstract:

This article introduces the project overview，construction goal and design philosophy of Hong Kong-Zhuhai-Macao Bridge. Based on large scale，factory production，standardiza-tion and assemble line，the innovative concept is taken as the general principle for design with the emphasis on description of the new material，new technology，new construction method and new equipment used in the design. The application of innovative technology has provided a solid foundation and favorable guarantee for project quality and design service life.

Keywords： 75 mm prestressing thicker reinforcing bar； orthotropic steel bridge deck； stayed cable with tensile

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Title Author Date Type Operation

Experimental research on the mechanical property of prestressing steel wire during and after heating

ZHENG Wenzhong, HU Qiong, ZHANG Haoyu

Journal Article

monitoring of the strengthening construction of a segmental box girder bridge and field testing of external prestressing

Ali Fadhil NASER, Zonglin WANG

Journal Article

The 32 m span box girder prestressing effect monitoring and creep camber control for Wuhan-Guangzhou

Song Jinxi

Journal Article