冷弯厚壁压弯构件抗震性能影响参数分析

The influence of parameters on the seismic performance of cold-formed thick-walled compression-bending members

冷弯厚壁型钢作为一种广泛应用于现代建筑结构中的材料,其在设计中展现出独特的优势,但其在地震荷载下的行为特性仍需进一步明确。通过数值分析研究宽厚比、长细比和轴压比等参数对冷弯厚壁压弯构件抗震性能的影响。研究结果表明,所有骨架曲线在第一和第三象限呈现出非对称形态,这表明冷弯厚壁压弯构件在加载与卸载过程中的力学行为存在明显差异。宽厚比、长细比和轴压比3个参数对冷弯厚壁压弯构件抗震性能均有影响,不同破坏模式又影响着构件的抗震性能。研究结果揭示了各参数与抗震性能之间的关系,强调了设计中需特别关注的关键点,以确保结构既安全又经济。

Cold-formed thick-walled steel,a pivotal constituent in modern architectural frameworks,boasts distinctive design advantages.However,a more profound comprehension of its behavior when subjected to seismic forces remains a priority in research.This investigation embarks on a meticulous numerical exploration into the repercussions of key parameters-namely,width-to-thickness ratio,slenderness ratio,and axial stress ratio-on the seismic resilience of cold-formed thick-walled compression-bending components.A pivotal revelation from this study lies in the observation that backbone curves consistently manifest an asymmetric profile across their first and third quadrants,attesting to stark discrepancies in the mechanical response during loading and unloading cycles.This underscores the intricate interplay between material properties and dynamic loads.Further,the research accentuates the profound influence exerted by each of these parameters-width-to-thickness ratio,slenderness ratio,and axial stress ratio-on the seismic robustness of the members,with the type of failure mode introducing additional layers of complexity to their seismic response.The outcomes of this study not only decipher the intricate,quantifiable links between these design parameters and seismic performance but also pinpoint focal areas that demand meticulous attention in the design phase.By doing so,it paves the way for engineering practices that harmonize structural safety with cost-effectiveness,thereby advancing the realms of seismic-resistant design in contemporary construction.