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Shanghong Chen
College of Civil Engineering, Fuzhou University, Fuzhou 350108, China

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Journal article
Published: 05 July 2021 in Buildings
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A tuned mass rocking wall (TMRW) is a passive control device that combines the merits of a traditional tuned mass damper (TMD) and a traditional rocking wall (RW). TMRWs not only help avoid weak story failure of the host structure but can also be regarded as a largely tuned mass substructure in the building structure. Through the appropriate design of the frequency ratio, the host structure can dissipate much more energy under earthquake excitations. In this paper, the basic equations of motion for the mechanical model of an SDOF structure-rigid rocking wall are established, and the optimization formulas of frequency ratio and damping ratio of TMRW are derived. Through the dynamic elastoplastic analysis of a six-story TMRW-frame model, the applicability of the derived parameter optimization formulas and the effectiveness of the TMRW in seismic performance control are investigated. The results demonstrate that the TMRW can coordinate the uneven displacement angle between stories of the host structure. Additionally, the TMRW is found to possess the merit of reducing both the peak and root-mean-square (RMS) structural responses when subjected to different types of earthquake excitations.

ACS Style

Andong Wang; Shanghong Chen; Wei Lin; Ai Qi. Seismic Performance Analysis of Tuned Mass Rocking Wall (TMRW)-Frame Building Structures. Buildings 2021, 11, 293 .

AMA Style

Andong Wang, Shanghong Chen, Wei Lin, Ai Qi. Seismic Performance Analysis of Tuned Mass Rocking Wall (TMRW)-Frame Building Structures. Buildings. 2021; 11 (7):293.

Chicago/Turabian Style

Andong Wang; Shanghong Chen; Wei Lin; Ai Qi. 2021. "Seismic Performance Analysis of Tuned Mass Rocking Wall (TMRW)-Frame Building Structures." Buildings 11, no. 7: 293.

Journal article
Published: 27 August 2020 in Construction and Building Materials
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As a by-product of nickel production, a large amount of ferronickel slag (FNS) puts great pressure on the environment. Therefore, there is an urgent need to treat the FNS to solve serious challenges to the environment. The FNS can be used as a partial replacement of Portland cement in concrete, so this industrial by-product may act as a suitable alternative of conventional building materials with high carbon footprint to achieve sustainable development. The concrete containing 0%, 15% and 30% FNS was prepared and assessed for its compressive strength, modulus of elasticity, tensile strength, resistance to chloride ions penetration and bond behaviors. The obtained results showed that the use of FNS had positive effects on the mechanical properties and durability of concrete due to the higher pozzolanic activity of FNS at the late hydration age and its finer particles than cement. Moreover, 15% FNS addition brought more significant increase in compressive strength, modulus of elasticity, tensile strength and bond strength than the use of 30% FNS as a replacement of cement. But the increasing FNS content resulted in the increase of resistance to chloride ions penetration of concrete. In addition, static loading tests and cyclic loading tests were carried out to assess the effects of the FNS on the overall structural behaviors of the prefabricated members. The specimens exhibited similar failure modes which mainly involved yielding of longitudinal steel bars. The ultimate bearing capacity attained by FNS concrete members was similar to that of conventional concrete members, but the specimens made of FNS concrete exhibited higher ductile capacity. The FNS concrete members also experienced more cracking and concrete crushing at the end of test, thus showing better energy dissipation capacity.

ACS Style

Qiong Liu; Shanghong Chen; Wei Lin; Ai Qi; Zhaohui Chen. Experimental behaviors of prefabricated members made of ferronickel slag concrete. Construction and Building Materials 2020, 261, 120519 .

AMA Style

Qiong Liu, Shanghong Chen, Wei Lin, Ai Qi, Zhaohui Chen. Experimental behaviors of prefabricated members made of ferronickel slag concrete. Construction and Building Materials. 2020; 261 ():120519.

Chicago/Turabian Style

Qiong Liu; Shanghong Chen; Wei Lin; Ai Qi; Zhaohui Chen. 2020. "Experimental behaviors of prefabricated members made of ferronickel slag concrete." Construction and Building Materials 261, no. : 120519.

Research article
Published: 23 December 2019 in Advances in Civil Engineering
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A new dapped-end beam to column connection is designed in this paper. Its assembly connection zone changes from inside the joint to midspan of the beam. The proposed connection can not only provide good structural integrity but also ensure that the plastic hinge moves away from the column edge. The rotational capacity of the plastic hinge determines the internal force redistribution of the joint and the energy dissipation capacity. The high-strength bolts and steel plates are used to realize connection, further enhancing the rotation of the plastic hinge and minimizing the cast-in-place concrete volume. Three full-scale exterior beam to column joints are casted and then subjected to reversal cyclic loading. The finite element (FE) analyses are carried out to compare with experimental results and study the effect of connection position on the structural behaviours. The obtained results show that the plastic hinges of all three specimens are firstly developed to a distance from the column edge, thus revealing that this kind of joint can achieve beam hinge mechanism and prevent joint shear failure. And the connection position is the most disadvantaged when coinciding with the plastic hinge zone, which would result in the excessive deformation and the early failure of the steel bar anchor system. The new type of joint shows good seismic performance during earthquake if the connection can be properly designed, and thus this kind of structural form can be applied to actual engineering structures in seismic regions.

ACS Style

Qiong Liu; Shanghong Chen; Wei Lin; Fanjin Zeng. Experimental Study on Novel Energy-Dissipating Prefabricated Beam-Column Joints. Advances in Civil Engineering 2019, 2019, 1 -17.

AMA Style

Qiong Liu, Shanghong Chen, Wei Lin, Fanjin Zeng. Experimental Study on Novel Energy-Dissipating Prefabricated Beam-Column Joints. Advances in Civil Engineering. 2019; 2019 ():1-17.

Chicago/Turabian Style

Qiong Liu; Shanghong Chen; Wei Lin; Fanjin Zeng. 2019. "Experimental Study on Novel Energy-Dissipating Prefabricated Beam-Column Joints." Advances in Civil Engineering 2019, no. : 1-17.

Journal article
Published: 22 April 2017 in Applied Sciences
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A pounding tuned mass damper (PTMD) is introduced by making use of the energy dissipated during impact. In the proposed PTMD, a viscoelastic layer is attached to an impact limitation collar so that energy can be further consumed and transferred to heat energy. An improved numerical model to simulate pounding force is proposed and verified through experimentation. The accuracy of the proposed model was validated against a traditional Hertz-based pounding model. A comparison showed that the improved model tends to have a better prediction of the peak pounding force. A simulation was then carried out by taking the benchmark Canton Tower, which is a super-tall structure, as the host structure. The dynamic responses of uncontrolled, TMD-controlled and PTMD controlled system were simulated under wind and earthquake excitations. Unlike traditional TMDs, which are sensitive to input excitations and the mass ratio, the proposed PTMD maintains a stable level of control efficiency when the structure is excited by different earthquake records and different intensities. Particularly, more improvement can be observed when an extreme earthquake is considered. The proposed PTMD was able to achieve similar, or even better, control effectiveness with a lower mass ratio. These results demonstrate the superior adaptability of the PTMD and its applicability for protection of a building against seismic activity. A parametric study was then performed to investigate the influence of the mass ratio and the gap value on the control efficiency. A comparison of results show that better control results will be guaranteed by optimization of the gap value.

ACS Style

Wei Lin; Gangbing Song; Shanghong Chen. PTMD Control on a Benchmark TV Tower under Earthquake and Wind Load Excitations. Applied Sciences 2017, 7, 425 .

AMA Style

Wei Lin, Gangbing Song, Shanghong Chen. PTMD Control on a Benchmark TV Tower under Earthquake and Wind Load Excitations. Applied Sciences. 2017; 7 (4):425.

Chicago/Turabian Style

Wei Lin; Gangbing Song; Shanghong Chen. 2017. "PTMD Control on a Benchmark TV Tower under Earthquake and Wind Load Excitations." Applied Sciences 7, no. 4: 425.

Article
Published: 06 August 2015 in Transactions of Tianjin University
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Free-interface dual-compatibility modal synthesis method(compatibility of both force and displacement on interfaces)is introduced to large-scale civil engineering structure to enhance computation efficiency. The basic equations of the method are first set up, and then the mode cut-off principle and the dividing principle are proposed. MATLAB is used for simulation in different frame structures. The simulation results demonstrate the applicability of this substructure method to civil engineering structures and the correctness of the proposed mode cut-off principle. Studies are also conducted on how to divide the whole structure for better computation efficiency while maintaining better precision. It is observed that the geometry and material properties should be considered, and the synthesis results would be more precise when the inflection points of the mode shapes are taken into consideration. Furthermore, the simulation performed on a large-scale high-rise connected structure further proves the feasibility and efficiency of this modal synthesis method compared with the traditional global method. It is also concluded from the simulation results that the fewer number of DOFs in each substructure will result in better computation efficiency, but too many substructures will be time-consuming due to the tedious synthesis procedures. Moreover, the substructures with free interface will introduce errors and reduce the precision dramatically, which should be avoided.

ACS Style

Guihan Peng; Wei Lin; Shanghong Chen; Jiexin Yu. Free-interface dual-compatibility modal synthesis substructure method in large-scale structures. Transactions of Tianjin University 2015, 21, 347 -355.

AMA Style

Guihan Peng, Wei Lin, Shanghong Chen, Jiexin Yu. Free-interface dual-compatibility modal synthesis substructure method in large-scale structures. Transactions of Tianjin University. 2015; 21 (4):347-355.

Chicago/Turabian Style

Guihan Peng; Wei Lin; Shanghong Chen; Jiexin Yu. 2015. "Free-interface dual-compatibility modal synthesis substructure method in large-scale structures." Transactions of Tianjin University 21, no. 4: 347-355.

Research article
Published: 15 July 2014 in Shock and Vibration
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Free-interface modal synthesis method is applied to civil structure, and a substructure method is proposed by introducing the method into global sensitivity method. The substructure expression of the derivatives of eigenvalues and eigenvectors with respect to elemental parameters is obtained. The accuracy of the application of free-interface modal synthesis method is evaluated with different retained modes in substructure, and then the effectiveness of the proposed substructure sensitivity method is illustrated through an 11-storey building under both single- and multidamage cases. Both the damage locations and the extent can be effectively identified. By comparing it with the identical results of global sensitivity method, the proposed method can be faster in detecting the damage location and more stable under multidamage cases. Since this substructure sensitivity method only needs to update sensitivity matrix in the substructure with relative small number of DOFs, it may save much computation effort and become more efficient.

ACS Style

Shanghong Chen; Wei Lin; Jiexin Yu; Ai Qi. Free-Interface Modal Synthesis Based Substructural Damage Detection Method. Shock and Vibration 2014, 2014, 1 -13.

AMA Style

Shanghong Chen, Wei Lin, Jiexin Yu, Ai Qi. Free-Interface Modal Synthesis Based Substructural Damage Detection Method. Shock and Vibration. 2014; 2014 ():1-13.

Chicago/Turabian Style

Shanghong Chen; Wei Lin; Jiexin Yu; Ai Qi. 2014. "Free-Interface Modal Synthesis Based Substructural Damage Detection Method." Shock and Vibration 2014, no. : 1-13.