Calculation of Steel Truss Node Connection Based on Secondary Stress Analysis
This article introduces the calculation problems related to a certain project's steel truss,with a focus on the secondary stress prob-lem in the design of trusses welded entirely with welded box steel.By analyzing the principle of secondary stress generation and combining with Section 8.5 of the"Design Standards for Steel Structures"(GB50017-2017),the secondary stress effect formula is calculated.The distribution law of the proportion of secondary stress to main stress in this type of truss is deeply analyzed.The stress comparison analysis between truss members calculated based on tension bending or compression bending components and considering favorable conditions such as plastic stress redistribution shows that the cross-section is conservative,and margin is large with current software calculating based on tension bending and compression bending components.Stress redistribution can be considered to appropriately optimize the cross-section without reducing the safety of the structure,provided for design reference.
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维普
