Bearing Performance of Aluminum Alloy Gusset Joints After Fire

doi:10.11908/j.issn.0253-374x.21352

Home > Archive>Volume 50, Issue 9, 2022 >1264-1275. DOI:10.11908/j.issn.0253-374x.21352

Bearing Performance of Aluminum Alloy Gusset Joints After Fire
DOI:
                        10.11908/j.issn.0253-374x.21352
                    
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                        GUO Xiaonong1GUO Xiaonong
College of Civil Engineering， Tongji University， Shanghai 200092， China
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XU Zeyu1XU Zeyu
College of Civil Engineering， Tongji University， Shanghai 200092， China
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CHEN Chen2CHEN Chen
China Resources Land Limited， Shanghai 201103， China
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LUO Jinhui1LUO Jinhui
College of Civil Engineering， Tongji University， Shanghai 200092， China
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Affiliation:1.College of Civil Engineering， Tongji University， Shanghai 200092， China;2.China Resources Land Limited， Shanghai 201103， China
Clc Number:TU391;TU317.1
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Abstract:

Research on the over-fire performance of aluminum alloy gusset （AAG） joints can provide a basis for evaluating the bearing performance of aluminum alloy reticulated shells after fire. The tensile tests of 6061-T6 aluminum alloy after fire were conducted and the formula of reduction coefficient of mechanical property after fire was given. The bearing performance tests of 12 pieces of 6061-T6 aluminum alloy gusset joints after fire were performed. The bending capacity and the possible failure modes of aluminum alloy gusset joints after fire were presented. The test results indicate that the material property of aluminum alloy and the mechanical property of aluminum alloy gusset joints show a three-fold trend with the change of fire temperature. Parametric analysis was carried out based on the numerical model to study the influence of material properties， over-fire temperature， and size specifications on the bearing performance of aluminum alloy gusset joints after fire. Finally， through numerical fitting， the calculation formula of the bending stiffness and the bearing capacity of aluminum alloy gusset joints after fire and the four-line model of moment-rotation curve were obtained.

Key words:aluminum alloy gusset joint;after fire;bearing capacity

Reference

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GUO Xiaonong, XU Zeyu, CHEN Chen, LUO Jinhui. Bearing Performance of Aluminum Alloy Gusset Joints After Fire[J].同济大学学报(自然科学版),2022,50(9):1264~1275

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Received:August 02,2021
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Online: September 29,2022
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