Tie Cheng Wang
Tianjin University
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Featured researches published by Tie Cheng Wang.
Materials Research Innovations | 2014
Tie Cheng Wang; Z. J. Yang; Huijuan Zhao; W. J. Wang
Abstract The main objective of this research is to evaluate the performance of prestressed high strength concrete (PHC) piles, concerning ductility and strength. The test results of four PHC piles under low cycle loading and two piles under monotonic flexural loading are presented in this paper, including the test phenomena, failure modes, hysteretic performances, ductility, bearing capacities and load–displacement curves. The variables studied in this research are the diameter of piles, steel ratio and prestress. From the result, it is indicated that the failure mode is bending damage. That is to say PHC piles have minimal energy-absorbing hysteretic behaviour, and the hysteretic loops are pinched. They will fail suddenly and violently with the loss of most of their lateral resistance. It is clear that the use of PHC pile in seismic applications should be approached with caution. The finite element software ABAQUS was used to simulate the nonlinear behaviour of piles under monotonic loading. Comparison between analytical and experimental results showed that the proposed modelling technique is capable of accurately describing the behaviour of piles.
Materials Research Innovations | 2014
Tie Cheng Wang; Q. Peng; H. Zhao
Abstract Drying shrinkage is one of the most important inducements to concrete cracking in long structures. To investigate the phenomenon of non-uniform shrinkage and the influence of concrete mix proportion on drying shrinkage, the theory of non-linear moisture diffusion was applied to model shrinkage in the long reinforced concrete structure with the original mix proportion and the optimised one. The three-dimensional numerical simulation was implemented based on the thermal–structural coupled analysis by ANSYS, considering the solution analogy between the moisture field and the temperature field. The moisture field and shrinkage induced stress field in concrete were calculated. The results show that the minimum relative humidity is greater, and the maximum humidity gradient is smaller in the structure with the optimised mix proportion than that in the structure with the original one due to the slower moisture diffusion. Consequently, the optimisation of mix proportion improves the cracking resistance prominently, for the cracking time and crack propagation are delayed significantly.
Advanced Materials Research | 2010
Tie Cheng Wang; Hai Long Zhao; Jin Jin Hao; Jian Quan Zu
The marked brittleness of concrete could be overcome by the addition of fibers. This paper experimentally investigated the mechanical properties and constitutive relationship of different fiber reinforced concrete. It is shown from the results that the compressive strength and peak strain of concrete with fiber have little improvement, but the ultimate strain, deformation capacity, toughness and energy dissipation capacity are improved greatly. The damage constitutive model recommended by the emendatory code for design of concrete structure (appendix C) (GB50010-2002) is applied for calculations and analyses according to the test results. The damage constitutive model and non-elastic constitutive model of different fiber reinforced concrete are established based on the test results. It is indicated from the analyses that the constitutive models established in this paper are in accordance with the characteristic of the fiber reinforced concrete in loading process. The damage constitutive model in appendix C in code could be applied directly in some low precision calculation and engineering application.
Materials Research Innovations | 2015
Tie Cheng Wang; W. J. Wang; Huijuan Zhao; Z. J. Yang
Abstract In this paper, steel fibre is applied to reinforce pre-stressed high-strength concrete pile in order to improve its seismic performance. The pre-stressed high-strength concrete piles reinforced with shearing J-end steel fibre and steel-wire J-end steel fibre, respectively, are selected here for low-reversed cyclic loading test to analyse the ductility, rigidity degeneration and energy dissipating capacity of such components. The results show that the ductility of pre-stressed high-strength concrete pile reinforced with steel fibre is not improved significantly while the horizontal bearing capacity is enhanced.
Applied Mechanics and Materials | 2014
Dong Fan Shang; Tie Cheng Wang; Zhi Feng Yang
Longxi Tower is the first time shift of pagoda relics in China. All the following factors increase the difficulty of the shift: long years’ construction, serious aging of its structure, poor integrity, small base area and great height. In the process, we used steel initiative urging support system and reinforced concrete protective tube for Longxi Tower’s reinforcement protection, so as to form a stable entirety. Compared to no protection measures, overturn-preventing calculations and further reinforce protection measures improved the safety factor 6.0 times, thus greatly improving the overturn-preventing ability of Longxi Tower.
Applied Mechanics and Materials | 2014
Xi Qing Bai; Tie Cheng Wang; Peng Yu Zhang; Da Yan; Tong Liu
In order to find the reason of concrete cracking in some construction. The mechanical property and micro-analysis of cores were tested, which drilled from cracked concrete floor. The test results indicated that alkali–aggregate reaction occurred, leading to the cracks in concrete floor. X-ray diffraction and scanning electron microscope facilitate the occurrence analysis and evaluation of cracked concrete.
Applied Mechanics and Materials | 2013
Qin Shan Li; Tie Cheng Wang
The urban underground pipe network plays a vital role in the city development, the construction of unreasonable urban pipe networks restricts the city development, even has a disastrous effect on the city. However, it is not desirable to overstate the investment of the urban underground pipe network excessively. It is an important subject of the city construction that how to establish reasonable urban pipe networks to meet service conditions of underground pipe networks. Because the construction of underground drainage pipe networks of most of the major cities in our country mainly comes from the 50s of last century and there are more pipe network system with the development of the city, it is the main content of our research that how to reform and construct them under the condition of existing underground pipe networks.
Applied Mechanics and Materials | 2013
Tie Cheng Wang; Yu Hang He; Hai Long Zhao
The underpinning plate is the main load-bearing structure in the integral jacking-up process of ancient building. The deformation and mechanical properties of the underpinning plate have impact on the stability and the safety of the whole integral jacking-up process. The deformation and mechanical properties of the underpinning plate in the loading stage and after the partial unloading stage are analyzed with ANSYS in the integral jacking-up process of a certain ancient building. It is shown that the deflection of the prestressed underpinning beam satisfies the requirement of the design code in the loading stage and after the partial unloading stage, the concrete at the bottom of the underpinning edge beam will not crack in the loading stage and the concrete at the bottom of the underpinning edge beam will crack after the partial unloading stage.
Applied Mechanics and Materials | 2013
Zhi Hui Bian; Shi Feng Fu; Tie Cheng Wang; Xu Guang Li
The technology of steel box girder shield and PLC synchronous pushing are used in the foundationl underpinning during the Yuzhen palace integrally lifting of Wudang Mountain for the first time. The characteristic of steel box girder is light weight, large internal operating space, high strength, and low friction coefficient with soil. The foundation underpinning of building is done by the steel box girder with PLC synchronous pushing system. The building is located on the integrity of good rigid chassis. The paper provides design principle of key component, design of PLC synchronous pushing system and related calculation method, and provides a new technology for protection building.
Applied Mechanics and Materials | 2013
Tie Cheng Wang; Wen Jin Wang; Hai Long Zhao; Zhi Jian Yang
The main purpose of this paper is to study the seismic performance of prestressed reinforced concrete pile (PRC pile) reinforced with nonprestressed reinforcements. Two prestressed high strength concrete piles (PHC piles) and two PRC piles were tested. The variables studied in this research are the prestressed reinforcements ratio and nonprestressed reinforcements ratio. The piles subjected to low-cycle loading were presented in this paper, including the hysteretic performance, stiffness degradation curves, coefficient of equivalent viscous damping and skeleton-frame curves. It is shown that the failure modes of all specimens are bending damage from the test and PRC piles have good energy-absorbing hysteretic behavior.