【摘要】 采用概率地震需求分析(PSDA)方法,评估核心型钢应变硬化率对屈曲约束支撑框架(BRBFs)残余侧移的影响。结果表明,应变硬化率变化仅为1%时,框架低层和中间层的残余侧移显著增加,BRBFs的恢复能力显著减小。另一方面,最大侧移与应变硬化率近似相互独立。震后出现较大永久侧移会对结构的性能带来严重影响,因此,准确的材料试验对结构安全十分重要。更多还原

【Abstract】 In this study the effect of steel core strain hardening ratio of Buckling-Restrained Braces(BRBs)on residual drift demands of Buckling-Restrained Braced Frames(BRBFs)was assessed by using Probabilistic Seismic Demand Analysis(PSDA)methodology.Results show that by mere 1% change in strain hardening ratio,the residual drift demands of low and medium-rise studied frames experienced significant increment and restoring ability of BRBFs reduced meaningfully.On the other hand,maximum drift demands were approximately independent from strain hardening ratio.Given that,the large permanent drifts can make serious serviceability issues after earthquakes,accurate material tests play an important role in structural safety.更多还原