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Ai Qi
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: 06 January 2019 in Applied Sciences
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This study proposes a new structural design of the first-story isolation system in reinforced concrete (RC) structures. Compared to the conditional buildings with independent columns, this new design integrates the independent columns with beams to increase the seismic capacity of the building by increasing the integrated stiffness of the coupled columns and the stability of the isolation system. The seismic responses of the proposed structure and the corresponding isolation effect were investigated by performing a series of numerical simulation and shaking table tests on a typical 7-story RC frame structure. The structure models were subjected to four earthquake waves with two PGAs (peak ground acceleration) of 0.30 g and 0.40 g for seismic analysis regarding the peak acceleration and inter-story displacement. Both simulation and testing results showed that the story acceleration and inter-story displacement of the superstructure in the isolated model decreased significantly. While the substructure below the isolation layer had a negligible decrease of acceleration. The connection of beams with concrete columns significantly increases the seismic capacity of the RC frame buildings compared to non-isolated frame buildings. The coupled beam-column connections could thus be potentially adopted in the practical first-story isolation system to avoid the requirements of large column stiffness and large column size.

ACS Style

Yingxiong Wu; Ning Liu; Ai Qi. Seismic Performance of a New Structural Design Solution for First-Story Isolated RC Buildings with Coupled Beam-Column Connections. Applied Sciences 2019, 9, 177 .

AMA Style

Yingxiong Wu, Ning Liu, Ai Qi. Seismic Performance of a New Structural Design Solution for First-Story Isolated RC Buildings with Coupled Beam-Column Connections. Applied Sciences. 2019; 9 (1):177.

Chicago/Turabian Style

Yingxiong Wu; Ning Liu; Ai Qi. 2019. "Seismic Performance of a New Structural Design Solution for First-Story Isolated RC Buildings with Coupled Beam-Column Connections." Applied Sciences 9, no. 1: 177.

Journal article
Published: 10 October 2018 in Applied Sciences
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Precast monolithic structures are increasingly applied in construction. Such a structure has a performance somewhere between that of a pure precast structure and that of a cast-in-place structure. A precast concrete frame structure is one of the most common prefabricated structural systems. The post-pouring joint is important for controlling the seismic performance of the entire precast monolithic frame structure. This paper investigated the joints of a precast prestressed concrete frame structure. A reversed cyclic loading test was carried out on two precast prestressed concrete beam–column joints that were fabricated with two different concrete strengths in the keyway area. This testing was also performed on a cast-in-place reinforced concrete joint for comparison. The phenomena such as joint crack development, yielding, and ultimate damage were observed, and the seismic performance of the proposed precast prestressed concrete joint was determined. The results showed that the precast prestressed concrete joint and the cast-in-place joint had a similar failure mode. The stiffness, bearing capacity, ductility, and energy dissipation were comparable. The hysteresis curves were full and showed that the joints had good energy dissipation. The presence of prestressing tendons limited the development of cracks in the precast beams. The concrete strength of the keyway area had little effect on the seismic performance of the precast prestressed concrete joints. The precast prestressed concrete joints had a seismic performance that was comparable to the equivalent monolithic system.

ACS Style

Xueyuan Yan; Suguo Wang; Canling Huang; Ai Qi; Chao Hong. Experimental Study of a New Precast Prestressed Concrete Joint. Applied Sciences 2018, 8, 1871 .

AMA Style

Xueyuan Yan, Suguo Wang, Canling Huang, Ai Qi, Chao Hong. Experimental Study of a New Precast Prestressed Concrete Joint. Applied Sciences. 2018; 8 (10):1871.

Chicago/Turabian Style

Xueyuan Yan; Suguo Wang; Canling Huang; Ai Qi; Chao Hong. 2018. "Experimental Study of a New Precast Prestressed Concrete Joint." Applied Sciences 8, no. 10: 1871.