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Hehui Z.,Key Laboratory of Large span Bridge Construction Technology | Xingfa W.,Key Laboratory of Large span Bridge Construction Technology | Min W.,Key Laboratory of Large span Bridge Construction Technology | Yongtao Z.,China Communications Construction Company Ltd.
IABSE Conference, Geneva 2015: Structural Engineering: Providing Solutions to Global Challenges - Report | Year: 2015

Precast segmental bridge with corrugated steel webs has good popularization value, for the advantages of precast segmental construction and box girder with corrugated steel webs. In order to study the mechanical behavior of this structure, 6 simply-supported scale model beams with corrugated steel webs were tested with the forming process, ratio of internal tendons to external tendons, shear-span ratio, number of joint, connection type of corrugated steel web,etc.,as the parameters. Stress variations in the concrete, web and tendon and deflection during loading are described, the crack generation and failure mode are also explained, the effects of parameters on the mechanical behavior of beams are analyzed. The study indicates that segmental beams have equal stiffness with monolithic beam in elastic stage, the joint affects the failure mode and causes decrease in the flexural bearing capacity, segmental beams with mixed post-tensioning or flange connector show better mechanical behavior than other segmental beams. Source


Yang Z.,Key Laboratory of Large span Bridge Construction Technology | Yang Y.,Key Laboratory of Large span Bridge Construction Technology
Applied Mechanics and Materials | Year: 2013

The originating base of large shield is a fundamental guarantee of shield machine prosperous assembly and originating posture. This paper based on Nanjing Weisan Road Tunnel Across Yangtze River, the requirements of large TBM assembly and the guarantee measures on originating posture is introduced. © (2013) Trans Tech Publications, Switzerland. Source


He M.,Changjiang Waterway Survey Center | Yang B.,Changjiang Waterway Survey Center | Huang S.,Wuhan University | You X.,China Communications Construction Company Ltd. | And 3 more authors.
Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) | Year: 2011

Dynamic characteristics are crucial parameters of structures, which could reflect the deviation of structures directly. This paper develops a software suite for structural dynamic characteristics analysis of bridges under construction, validates its correctness and reliability using dynamic monitoring data, interprets the physical property of dynamic characteristics and reaches significant conclusions for understanding large unknown structures. Source


Zhang G.Z.,Wuhan Harbor Engineering Design and Research Institute Co. | Zhang G.Z.,Key Laboratory of Large span Bridge Construction Technology | Liu K.X.,Wuhan Harbor Engineering Design and Research Institute Co. | Liu K.X.,Key Laboratory of Large span Bridge Construction Technology | And 7 more authors.
Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology | Year: 2010

According to the chloride corrosion environment, service life prediction model of concrete structure of sea-crossing bridge was built using modified Fick's second law and the whole probability calculation method, which was suitable for China. Furthermore, a visual service life prediction program of concrete structure was developed by optimized Monte Carlo method. Meanwhile, Life 365 program was compared, indicating reliability of the prediction program. Finally, the validity of prediction model was verified in JinTang Bridge of Zhoushan Island Mainland Linkage Project. Source


Yang Y.,Key Laboratory of Large span Bridge Construction Technology | Ji F.,Key Laboratory of Large span Bridge Construction Technology | Yang Z.,Key Laboratory of Large span Bridge Construction Technology
Applied Mechanics and Materials | Year: 2013

The surface-layers have very high water content and low bearing capacity, so far to be the very soft clay foundation, which come from the reclaimed land in project of reclamation. It is difficult to improve the very soft clay foundation by traditional vacuum preloading. A new method named surface soft soil improvement is presented in this paper, which can make the soft clay foundation to be improved in preliminary. Once forming the hard coat layer, the foundation may reach the needs of further construction. In the construction technology, the horizontal filter pipe net is used to instead of the sand bedding course. By laying of woven cloth and non-woven geotextile over the surface of reclaimed silt, installing PVDs by manpower becomes possible. Besides, the vertical PVDs all are connected with the horizontal filter pipe net directly, that makes a whole spatial drainage system. The loss of the degree of vacuum is decreased, and the improvement is increased. Thus, this construction technology is as a reference to the large scale engineering construction and similar projects. © (2013) Trans Tech Publications, Switzerland. Source

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