焊接梁柱连接的有限元断裂分析

Wei-Ming Chi, G. Deierlein, A. Ingraffea
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引用次数: 6

摘要

在1994年北岭地震期间,焊接梁-柱连接意外的脆性开裂引起了人们对钢抗矩框架抗震设计和施工标准和实践的严重关注。作为研究连接损伤的国家协调项目的一部分,有限元断裂分析用于量化受各种细节参数影响的焊接梁柱连接的断裂韧性需求。用k1、CTOD和CTOA对梁翼缘坡口焊缝焊缝根部缺陷处的韧性要求进行了量化。总结了有关有限元断裂分析在研究断裂行为以及诸如缺陷尺寸、焊缝强度、非弹性裂纹扩展和其他影响断裂韧性要求的参数等因素的影响方面的作用的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Finite-Element Fracture Analyses of Welded Beam-Column Connections
Unexpected brittle cracking of welded beam-column connections during the 1994 Northridge earthquake has raised serious concerns about standards and practice for the seismic design and construction of steel moment resisting frames. As part of a nationally coordinated program to investigate the connection damage, finite-element fracture analyses are used to quantify fracture toughness demands in welded beam-column connections as influenced by various detailing parameters. Toughness demands at weld root defects in the beam flange groove welds are quantified in terms of K 1 , CTOD, and CTOA. Summarized are insights concerning the role of finite-element fracture analyses to investigate fracture behavior and the influence of factors such as flaw sizes, weld strengths, inelastic crack growth, and other parameters affecting fracture toughness demands.
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