Progressive Collapse Resistance of GFRP-Strengthened RC Beam-Slab Subassemblages in a Corner Column-Removal Scenario
Progressive Collapse Resistance of GFRP-Strengthened RC Beam-Slab Subassemblages in a Corner Column-Removal Scenario
复制标题
GFRP 增强 RC 梁的渐进抗倒塌能力 — 角柱中的板组件 — 拆除场景
DOI：
10.1061/(asce)cc.1943-5614.0000917
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发表时间：
2018
影响因子：
4.6
通讯作者：
Jianxiang Yang
中科院分区：
文献类型：
--
作者：
Peng Feng;Hanlin Qiang;Xin Ou;Weihong Qin;Jianxiang Yang
在钢筋混凝土结构中，角柱的突然破坏比内柱或边柱的破坏更容易引起严重的连续倒塌，因为周围构件的拉结力相对较弱。有效的加固方法可以提高此类结构的抗连续倒塌能力。纤维增强复合材料（FRP）具有强度高、重量轻、耐腐蚀等优点，已被广泛应用于钢筋混凝土结构的加固。本研究主要探讨玻璃纤维布（GFRP）加固钢筋混凝土梁板组合体在角柱拆除下的连续倒塌行为。首先，采用拟静力试验研究了梁板组合体的抗连续倒塌性能，包括控制试件和加固试件。采用外贴GFRP层板和贴附GFRP筋两种加固方法。通过对比试验结果，研究了加固方案对试件受力性能的影响。试验结果表明，该加固技术可以提高钢筋混凝土梁板结构的抗连续倒塌能力。梁板子组合的连续倒塌阻力的有限元（FE）分析也进行了使用软件包MSC Marc。该数值模型可以预测组合体的抗连续倒塌能力。此外，计算结果被用来更好地了解GFRP的应力分布在角柱删除的情况下。
In RC buildings, the unexpected sudden failure of a corner column is more likely to cause severe progressive collapse than the failure of an interior column or a side column due to the relatively weak tie force from the surrounding elements. Effective strengthening methods can improve the progressive collapse resistance of these structures. Fiber-reinforced polymer (FRP) has been widely used to retrofit RC structures due to its high strength, light weight, and corrosion resistance. In this study, the progressive collapse behaviors of glass FRP (GFRP)-strengthened RC beam-slab subassemblages under corner column removal were investigated. First, a quasi-static experimental test was adopted to study the progressive collapse resistance of the beam-slab subassemblages, including a control specimen and strengthened specimens. Two techniques applying externally bonded GFRP laminates and near-surface-mounted (NSM) GFRP bars were adopted to strengthen the subassemblages. The influences of the strengthening schemes on the behavior of the tested specimens were studied by comparing all the test results. The experimental results demonstrate that this strengthening technology can enhance the progressive collapse resistance of RC beam-slab structures. Finite-element (FE) analysis of the progressive collapse resistance of the beam-slab subassemblages was also conducted using the software package MSC Marc. The numerical model can predict the progressive collapse resistance of the subassemblages. In addition, the calculated results were used to better understand the stress distribution of the GFRP in a corner column-removal scenario.