Cyclic Stability Criteria for Steel Moment Connections with Reduced Beam Section
Cyclic Stability Criteria for Steel Moment Connections with Reduced Beam Section
复制标题
梁截面减小的钢弯矩连接的循环稳定性准则
DOI：
10.1061/(asce)0733-9445(2001)127:9(1021
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
Chao
中科院分区：
文献类型：
--
作者：
C. Uang;Chao
对梁截面减小的钢框架节点的循环失稳性能进行了统计分析。基于55个足尺试件的试验结果，进行了回归分析，以评估响应量（塑性旋转能力和强度退化率）和细长参数的屈曲之间的关系。对线性和非线性模型进行的回归分析表明，响应量高度依赖于腹板局部屈曲的细长比，而不是侧扭屈曲。建立了腹板和翼缘局部屈曲模态的响应量与细长比之间的关系。针对目标塑性转角承载力，提出了抗震设计中腹板局部屈曲的宽厚比限值。混凝土板效应的研究表明，它将提高强度和塑性旋转能力的减少梁截面梁在正弯曲。然而，在负弯曲下，板仅略微提高塑性转动能力，这意味着板不能用来支撑梁的底部翼缘。
A statistical study was performed to evaluate the cyclic instability of steel moment connections with reduced beam sections. Based on test results of 55 full-scale specimens, regression analyses were performed to evaluate the relationships between response quantities (plastic rotation capacity and strength degradation rate) and slenderness parameters for buckling. Regressions analyses performed on a linear and a nonlinear model showed that the response quantities are highly dependent on the slenderness ratio of web local buckling, not lateral-torsional buckling. Relationships between the response quantities and the slenderness ratios for both web and flange local buckling modes were developed. For a target plastic rotation capacity, the limiting width-thickness ratio of web local buckling for seismic design is presented. An investigation of the concrete slab effect showed that it would increase both the strength and plastic rotation capacity of the reduced beam section beams under positive bending. Under negative bending, however, the slab only enhanced the plastic rotation capacity slightly, implying that the slab cannot be counted on to brace the beam bottom flange.