Damage of multi-ribbed composite wall cell after high temperatures

SUN Jing; WU Junyi; ZHAO Xiuli

doi:10.16511/j.cnki.qhdxxb.2021.21.038

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Journal of Tsinghua University(Science and Technology) ›› 2022, Vol. 62 ›› Issue (2) : 285-293. DOI: 10.16511/j.cnki.qhdxxb.2021.21.038

SPECIAL SECTION:DISASTER PREVENTION AND MITIGATION

Damage of multi-ribbed composite wall cell after high temperatures

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Abstract

The multi-ribbed composite wall structure system is widely used in our country as a kind of energy-saving and shock-absorbing prefabricated building. However, the damage caused byfire reduces the performance of the building and seriously threatens the safety of human life and property. To analyze the performance of the multi-ribbed composite wall cell (MCWC) after high temperatures, MATLAB is used as the platform, the rigid framebar model of elastic-plastic damageis selected, the damage variables after high-temperatureof the subunits in the model are defined, and the local damage value of the wall cell after high temperatures is obtained using the MRCS-Tprogram. Based on the energy method and the local damage value, the general damage index is constructed and used to evaluate the damage. The damage state of MCWC after high temperatures is divided into five stages, and the damage limit value of each stage is given, which provides the basis for damage assessment of MCWC after high temperatures.

Key words

multi-ribbed composite wall cell (MCWC) / after high temperatures / local damage index / general damage index / damage assessment

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SUN Jing, WU Junyi, ZHAO Xiuli. Damage of multi-ribbed composite wall cell after high temperatures[J]. Journal of Tsinghua University(Science and Technology). 2022, 62(2): 285-293 https://doi.org/10.16511/j.cnki.qhdxxb.2021.21.038

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