Theoretical analysis of the mechanical behavior of double-ring joints under pure bending, bending-shear and eccentric loading conditions

Zhang, Zhijie; Feng, Ruoqiang; Chen, Yao

doi:10.1016/j.engstruct.2021.111854

Cited by 16 publications

(1 citation statement)

References 23 publications

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“…Either the reticulated shell's displacement will not converge as the PGA climbs over a certain threshold, or the structure will collapse. When the structure has reached the critical failure stage, the members yield over a wide range, whereas the overall yield degree of the joints is low [31,32]. Damage to the structure can be stated as an attribute of an unexpected change in the material or geometric properties that are acting against the functioning of the system and adversely affecting its safety, dependability, and performance.…”

Section: Scopementioning

confidence: 99%

Identification of Structural Damage and Damping Performance of a Mega-Subcontrolled Structural System (MSCSS) Subjected to Seismic Action

2022

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Due to multiple degrees of freedom, evaluating high-rise buildings’ seismic safety under unpredictable seismic excitations is difficult. To address the issue that the damage mechanism of a mega-subcontrolled structural system (MSCSS) has not yet been studied, this paper employs ABAQUS software with strong nonlinear analysis capabilities to analyze the nonlinear elastic‒plastic time history of an MSCSS, analyze structural damage to the MSCSS structure, reveal the internal energy dissipation mechanism of the MSCSS, and evaluate the damping performance of the MSCSS structure. This work presents a novel and optimized MSCSS structure equipped with SPSW that improves the system’s seismic performance. First, a refined finite element model of the MSCSS is established, and the impact of vigorous seismic excitations on the damage to the MSCSS structure is considered. The MSCSS structure’s vulnerable parts are then summarized using stress nephograms and residual stresses. Finally, the favorable damping performance of the structure reveals that the newly proposed structure has good shock absorption performance based on an analysis of the energy dissipation, time history, and interstory drift of the MSCSS. This paper’s research findings elaborate the structural damage trend in MSCSS structures, which can serve as a theoretical foundation for MSCSS structure damage identification.

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Section: Scopementioning

confidence: 99%

Identification of Structural Damage and Damping Performance of a Mega-Subcontrolled Structural System (MSCSS) Subjected to Seismic Action

2022

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Collapse-resistance optimization of fabricated single-layer grid shell based on sequential approximate optimization

Zhang

Kanno

Feng

2023

Struct Multidisc Optim

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In this work, the surrogate model of the collapse load in terms of the structural morphology is established based on the radial basis function (RBF) network, and the form-finding optimization of the fabricated single-layer grid shell aiming at the improvement of collapse-resistance capacity is realized. To improve the accuracy of the optimal solution, the density function is used to determine the sparse region in the design domain and add new sample points in the sparse region. Avoiding that the optimization is trapped in a poor local optimum, the starting point is updated to approach the global optimum. Three types of fabricated single-layer grid shells, including cylindrical surface, free-form surface with symmetric supports, and free-form surface with asymmetric supports, are selected for form-finding optimization. The results prove the efficiency of the optimization algorithm. The proposed optimization method considers the mechanical properties of assemble joints and reflects the mechanical characteristics of the actual structure. It can be used for form-finding optimization and shape selection in structural design and thus has engineering significance.

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Generative design and topology optimization research for single–layer aluminum alloy grid shell connections

Wang,

Huang,

Zhang

et al. 2024

Case Studies in Construction Materials

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Theoretical analysis of the mechanical behavior of double-ring joints under pure bending, bending-shear and eccentric loading conditions

Cited by 16 publications

References 23 publications

Identification of Structural Damage and Damping Performance of a Mega-Subcontrolled Structural System (MSCSS) Subjected to Seismic Action

Identification of Structural Damage and Damping Performance of a Mega-Subcontrolled Structural System (MSCSS) Subjected to Seismic Action

Collapse-resistance optimization of fabricated single-layer grid shell based on sequential approximate optimization

Generative design and topology optimization research for single–layer aluminum alloy grid shell connections

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