Aseismic performance analysis of prefabricated wallboard with concealed braces connected on both sides

LI Bin1, WANG Zhan1,2, WANG Peng2,3, PAN Jianrong1,2, FAN Yanjing1, QIN Jiangui1

Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (9) : 9-17.

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PDF(3970 KB)
Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (9) : 9-17.

Aseismic performance analysis of prefabricated wallboard with concealed braces connected on both sides

  • LI Bin1, WANG Zhan1,2, WANG Peng2,3, PAN Jianrong1,2, FAN Yanjing1, QIN Jiangui1
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Abstract

A beam-connected prefabricated wall with concealed brace was proposed for precast steel frame structures. Six 2/3-scale prefabricated walls with concealed brace were designed to be tested under horizontal shear cyclic loading, respectively. Several typical failure modes, the shear capacity, ductility, and energy dissipation capacity of specimens were investigated. The test results show that the prefabricated wall with concealed brace has excellent ductility and energy dissipation capacity. Reducing the shear-span ratio and increasing the thickness of prefabricated wall can effectively increase its shear capacity, but the peak displacement will be reduced to 1/2 of the original. The concealed column can effectively improve the shear capacity. The lower weld of the bottom T-stub and the skeleton should be strengthened, and the upper connection should be set as slotted holes to prevent bolt shear failure. The finite element software ABAQUS was used to analyze the experimental model. The parametric analysis results of prefabricated wall with concealed brace was carried out. The analysis show that increasing the strength of concrete has little effect on the peak load of prefabricated wall, but when the strength of concrete used is above C30, it can effectively increase the yield load. When the weight of concealed brace is the same, increasing the section width is a more efficient way of improving the shear capacity of prefabricated wall.

Key words

beam-connected prefabricated wall / concealed brace / quasi-static test / numerical simulation / seismic performance

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LI Bin1, WANG Zhan1,2, WANG Peng2,3, PAN Jianrong1,2, FAN Yanjing1, QIN Jiangui1. Aseismic performance analysis of prefabricated wallboard with concealed braces connected on both sides[J]. Journal of Vibration and Shock, 2022, 41(9): 9-17

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