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8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016

作者： Wang, Zhenyu Cai, Zhongkui Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Harbin150090 China School of Civil Engineering Harbin Institute of Technology Harbin150090 China

ISBN: (纸本)9789881448026

The rapid construction nature and outstanding self-centring ability make the post-tensioned precast segmental (PTPS) bridge pier a promising alternative to traditional cast-in-place piers. In this paper, PTPS piers reinforced with both steel and fibre reinforced polymer (FRP) bars were numerically analyzed. This type of pier is referred to as a hybrid bars reinforced PTPS bridge pier in this paper. The steel bars which continuously cross the segment joints (referred to as ED bars) were expected to improve the energy dissipation ability of the PTPS piers, while the FRP bars were expected to increase the post-yield stiffness and to decrease the residual displacement. Monotonic and cyclic analyses on hybrid bars reinforced PTPS piers were subsequently conducted. Three parameters were investigated, namely, the mechanical properties of FRP bars, the FRP bar reinforcement ratio and the proportion of FRP bars to ED bars. According to the analysis results in this study, the FRP bars are effective on improving the self-centring ability of the hybrid bars reinforced PTPS piers. Copyright © 2016 Department of Civil and Environmental Engineering & Research Institute for Sustainable Urban Development, The Hong Kong Polytechnic University.

关键词： Energy dissipation

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Influence of mineral admixtures on the rheological behavior of self-compacting concrete

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Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) 2016年第2期46卷 439-444页

作者： Gao, Xiao-Jian Sun, Bo-Chao Ye, Huan Wang, Zi-Long Key Lab of Structures Dynamic Behavior and Control Ministry of Education Harbin Institute of Technology Harbin150090 China School of Civil Engineering Harbin Institute of Technology Harbin150090 China

In this paper, the influence of mineral admixtures on the rheological properties of fresh Self-Compacting Concrete (SCC) mixture was studied using a new type of concrete rheometer. The results show that both yield shear stress and plastic viscosity of the SCC mixture decrease as the content of fly ash in the mixture increases. As the content of Ground Granulated Blast Furnace Slag (GGBFS) increases, the thixotropy behavior of the SCC mixture becomes more obvious, and the yield stress decreases first and then increases. Both the yield stress and the thixotropy behavior of SCC mixture increase with the addition of limestone powder. For all the SCC mixtures with different mineral admixtures, as the storage time increases, the thixotropy behavior of fresh concrete is gradually weakened, the yield stress increases and the plastic viscosity decreases. © 2016, Editorial Board of Jilin University. All right reserved.

关键词： Fly ash

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Realization of the global yield mechanism of RC frame structures by redesigning the columns using column tree method

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Science china(Technological Sciences) 2015年第10期58卷 1627-1637页

作者： BAI JiuLin OU JinPing School of Civil Engineering Harbin Institute of Technology Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology) Ministry of Education

Global failure mechanism, i.e., the strong-column weak-beam mechanism, can provide higher total energy dissipation capacity with less ductility demand on components than other failure modes, and results in a more uniform story drift distribution and higher resistance to earthquake loads at the system level. However, the current code-based elastic design method cannot guarantee the global failure mechanism of frame structures under severe earthquakes. In this paper, a simple, but practical design procedure is proposed to ensure the global failure mechanism of reinforced concrete(RC) frame structures by redesigning the columns using the column tree method(CTM). CTM considers the yield limit state of all beams and column bases. The code-based design is firstly carried out to determine the section information of all beams and base columns. Then, the internal force demands applied on the column tree can be derived. Lastly, the column moments, shear forces and axial forces are determined according to the free-body diagram of CTM to finish the column redesign. Two RC frame structures with 6 and 12 stories are illustrated to verify the design procedure. The analytical results demonstrate the proposed approach can realize the global failure mechanism.

关键词： global failure mechanism column tree method （CTM） reinforced concrete frame structures failure mode plastic hinges

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Corrigendum to “Predicting water permeability and relative gas permeability of unsaturated cement-based material from hydraulic diffusivity” [Cem. Concr. Res. 58 (2014) 152–1 60]

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Cement and Concrete Research 2016年 87卷 105-106页

作者： Chunsheng Zhou Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology) Ministry of Education Heilongjiang Harbin 150090 China School of Civil Engineering Harbin Institute of Technology Harbin 150090 China

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Damage detection in metallic plates using d36 piezoelectric phased arrays 8

Damage detection in metallic plates using d36 piezoelectric ...

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8th European Workshop on Structural Health Monitoring, EWSHM 2016

作者： Wang, Wentao Lynch, Jerome P. Li, Hui Key Lab of Structures Dynamic Behavior and Control Ministry of Education Harbin Institute of Technology Harbin150090 China Department of Civil and Environmental Engineering University of Michigan Ann ArborMI48109-2125 United States Department of Electrical Engineering and Computer Science University of Michigan Ann ArborMI48109-2125 United States

ISBN: (纸本)9781510827936

Recently, d36-type piezoelectric wafers derived from lead magnesium niobate-lead titanate (PMN-PT) single crystal materials have been proposed for elastic wave generation in thinwalled structures. In contrast to traditional d31 piezoelectric materials which generate symmetric and anti-symmetric Lamb waves, d36 introduces these same Lamb waves plus an inplane shear horizontal (SH) wave. Based on guided wave theory, the SH0 wave mode is nondispersive which may find many advantages uses in structural health monitoring. To detect and localize damage (e.g., cracks, corrosion) in thin walled structures, a phased array of d36- type piezoelectric wafers is proposed. To validate the proposed phase array, extensive experiments have been conducted using an aluminum plate with four d36 PMN-PT piezoelectric wafers surface bonded. The d36 phased array is shown capable of accurately detecting the location of local damage in the plate. Good detection accuracy is observed indicating that this proposed methodology has the potential to provide an effective identification of damage in metallic thin walled structures.

关键词： Damage detection

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Creep of concrete with high amounts of supplementary cementitious materials and applications in concrete-filled tubes 4

Creep of concrete with high amounts of supplementary cementi...

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4th International Conference on Sustainable Construction Materials and Technologies, SCMT 2016

作者： Kuder, Katie Lehman, Dawn Chien, Jie Roeder, Charles Lowes, Laura Civil and Environmental Engineering Seattle University 901 12th Ave SeattleWA98122-1090 United States More Hall Civil and Environmental Engineering University of Washington SeattleWA98195-2700 United States Key Lab of Structures Dynamic Behavior Control of the Ministry of Education Harbin Institute of Technology Harbin150090 China

Due to its design versatility, availability and cost efficiency, concrete continues to play a dominant role in the construction industry. However, the production of Portland cement, a primary component of typical concrete mixes, is known to have a serious impact on the environment. Increasing the use of supplementary cementitious materials (SCMs) in concrete is an obvious and necessary step to reduce the carbon emissions associated with cement production. However, most reinforced concrete (including cast-in-place and precast) structural components rely on the early stiffness and strength of the concrete to resist self-weight and construction loadings after the release of the formwork. In contrast to cement-only concretes, high SCM concretes require more time to reach the target strength and stiffness values. Therefore, a structural component that does not depend on these engineering properties during construction is preferred. Concrete-filled tubes (CFTs) offer a solution to this challenge, with the steel tube is able to support construction loads while the high SCM concrete fill develops its strength and stiffness. However, there are concerns about the long-term deformations (creep) of high SCM concrete and its impact on CFT performance. This research develops models to predict the long-term (creep) response of SCM concretes and uses those predictive models to assess the long-term response of CFTs with SCM concrete fill. The models were validated using a large SCM database and two full-scale CFTs with SCM concrete fill that were tested under sustained loading. © 2016 International Committee of the SCMT conferences. All rights reserved.

关键词： Creep

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Comparjsion of seismic performance of rc precast fabricated shear wall with different infillled opening

Comparjsion of seismic performance of rc precast fabricated ...

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2015 fib Symposium: Concrete - Innovation and Design

作者： Zhai, Ximei Hu, Wenbo Key Lab. of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Harbin Heilongjiang150090 China

A new method to infill the opening in the RC precast fabricated concrete shear wall was applied in china. In this paper, three geometrically identical RC precast fabricated shear wall specimens were experimented under constant axial load and quasi-statie cyclic lateral loading. The methods to infill the opening of the wall were respectively integration infill, masonry infill and without infill. Hysteretic curves, skeleton curves, failure process, variation of rebar strain, stiffness, ductility and energy-dissipating capacity were obtained. The results showed that the integration shear wall owns good seismic performance. Its bearing capacity, stiffness, energy-dissipating capacity are excellent while ductility is relatively poor. Masonry infilled wall and wall without infill also own good seismic performance. Meanwhile, numerical simulation of three specimens was conducted by using finite element (FE) software OpenSees. Based on the reasonable modeling and the application of multi-layer shell element, the FE results were verified with the experimental results.

关键词： Shear walls

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Seismic performance of fabricated structural system of steel frame-buckling-restrained steel plate shear wall with inclined-slots

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Tumu Gongcheng Xuebao/china Civil Engineering Journal 2016年 49卷 32-38页

作者： Peng, Han Jin, Shuangshuang Ou, Jinping Harbin Institute of Technology Harbin150090 China Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Harbin150090 China

Buckling-restrained steel plate shear wall with inclined slots (simply referred as "slotted SPSW") is a new proposed lateral resistant member. Compared with traditional steel plate shear wall, it has the advantages of more adjustable parameters, stable energy dissipation capacity and good ductility. It can also work as fabricated unit and form fabricated shear wall structure and different fabricated lateral load resisting systems by assembling units. This paper introduces the fabricated structural system of steel frame-slotted SPSW, including the design method of slotted SPSW, fabricated shear wall structure and the design procedure of the structural system. A case of 20-story office building was designed using the structural system and its seismic performance was analyzed under frequent and rare earthquake. The results show that the slotted SPSW can provide high lateral stiffness and dissipate energy thus protecting the main structure, conforming to principle of dual system and showing the structural system exhibits excellent seismic performance. © 2016, Editorial Office of china Civil Engineering Journal. All right reserved.

关键词： Energy dissipation

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Post-build concrete wing wall reinforce frame corner column seismic performance experimental

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Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology 2015年第12期47卷 21-25页

作者： Yang, Fan Zheng, Wenzhong Wang, Ying Key Lab of Structures Dynamic Behavior and Control Harbin Institute of Technology Ministry of Education Harbin150090 China

6 specimens of post-build concrete wing wall located two neighboring faces of corner columns were designed and conducted to study the seismic performance of the post-build concrete wing wall reinforce frame corner column. Three test axial compression ratio including 0.31, 0.36, 0.40 was designated for exiting frame corner columns. HRB400 was used as longitudinal steel bar. The ratio of longitudinal reinforcement was 1.23%, 1.05%, 0.82% and stirrup with HPB300 ratio 0.6%. The results of six specimens under cyclic reversing load show that damage degree of the parallel wing wall away from the corner column was significant, while the corner column and the perpendicular wing wall were damaged lighter. Existing column could resist vertical loads and horizontal seismic actions. The wing walls could bear horizontal seismic action and as an effective dissipation energy component. © 2015, Editorial Board of Journal of Harbin Institute of Technology. All right reserved.

关键词： Energy utilization

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Moment modulation design method of reinforced concrete continuous beam with high-strength hot-rolled bar

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Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology 2015年第12期47卷 16-20页

作者： Li, Ling Wang, Ying Zheng, Wenzhong Key Lab of Structures Dynamic Behavior and Control Harbin Institute of Technology Ministry of Education Harbin150090 China

392 two-span continuous beams which are used HRB335, HRB400, HRB500 and HRB600 reinforcements are analyzed to investigate the bending moment amplitude modulation rule of concrete continuous beam with high-strength hot-rolled bar. The moment redistribution is investigated in two phases: One is the modulation amplitude βb caused from loading to steel yielding in control section of support. The other is βa caused from formation of a plastic hinge to the crushing of compressive extreme concrete fiber in control section of support. The results indicate that the plastic hinge appears delay and the rotation capacity of plastic hinge decreases, at the same time, the interval from the tensile extreme concrete fiber into the plastic to longitudinal reinforcement yielding ranges longer. The moment amplitude modulation coefficient equation using θp/h0 as the key parameters with a certain intercept βb has been obtained. Practical expression with ξ as independent variable has been proposed to facilitate the engineering applications. © 2015, Editorial Board of Journal of Harbin Institute of Technology. All right reserved.

关键词： Amplitude modulation

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