【摘 要】
：
为研究既有钢框架柱在采用PEC(partially encased concrete)方法加固后的抗震性能,完成1个PEC柱-型钢梁中柱节点及1个钢框架中柱节点的低周往复加载试验。分析了试件的破坏形态、承载能力、梁端塑性铰区弯矩-转角曲线、延性性能、耗能能力、节点区域相关构件的应变。结果表明:采用PEC方法加固后,框架中柱节点滞回曲线呈纺锤形,试件初始刚度、承载力分别提升约40%,31.1%,且具有较好的延性性能及耗能能力;试件破坏形态为梁弯曲破坏,梁端塑性铰具有很好的转动能力。节点基本完好,实现了"强
【机 构】
：
内蒙古科技大学土木工程学院,内蒙古第三电力建设工程有限责任公司
【基金项目】
：
国家自然科学基金项目(51268042),内蒙古科技大学土木工程学院攀登计划项目(KY-01),内蒙古科技大学创新基金项目(2019QDL-S08)。
论文部分内容阅读
为研究既有钢框架柱在采用PEC(partially encased concrete)方法加固后的抗震性能,完成1个PEC柱-型钢梁中柱节点及1个钢框架中柱节点的低周往复加载试验。分析了试件的破坏形态、承载能力、梁端塑性铰区弯矩-转角曲线、延性性能、耗能能力、节点区域相关构件的应变。结果表明:采用PEC方法加固后,框架中柱节点滞回曲线呈纺锤形,试件初始刚度、承载力分别提升约40%,31.1%,且具有较好的延性性能及耗能能力;试件破坏形态为梁弯曲破坏,梁端塑性铰具有很好的转动能力。节点基本完好,实现了"强
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