LRS FRP加固既有人防剪力墙的抗冲击试验研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (18) : 208-219.

论文

LRS FRP加固既有人防剪力墙的抗冲击试验研究

陈文龙1，张君博2，梁海志1，王阳明3，张纪刚1

作者信息 +

Experimental study on the impact resistance of LRS FRP strengthened shear walls in the existing civil air defense engineering

CHEN Wenlong1,ZHANG Junbo2,LIANG Haizhi1,WANG Yangming3,ZHANG Jigang1

Author information +

文章历史 +

摘要

大应变FRP材料（Large Rupture Strain FRP）较传统FRP具有更大的断裂应变，为探究大应变FRP加固既有人防工程剪力墙的抗冲击性能，分别采用PET LRS-FRP（聚对苯二甲酸乙二醇酯FRP）和PEN LRS-FRP（聚萘二甲酸乙二醇酯FRP）加固人防工程剪力墙并开展冲击试验，与未加固的人防工程剪力墙试验与数值结果进行对比分析。结果表明，基于数值模拟所得到的破坏形态与试验现象吻合良好，均为典型的受弯破坏。相较于未加固墙，FRP能大幅提升人防工程剪力墙的极限承载力和抗弯刚度，显著降低跨中挠度。PEN FRP加固较PET FRP加固能提供更好的抗变形能力，进而减轻墙体冲击损伤，但PET FRP较PEN FRP应变范围更广，可提供更好的延性。此外，FRP加固均能显著提升剪力墙的耗能能力，其中PET FRP加固墙的耗能能力要优于PEN FRP加固墙。

Abstract

Existing shear walls of the civil air defense engineering are strengthened by the large rupture strain fiber reinforced polymer (LRS FRP), due to its excellent fracture strain performance, and the impact resistance of the strengthened walls is investigated through the impact tests. PET FRP (polyethylene terephthalate FRP) and PEN FRP (polyethylene naphthalate FRP) are adopted, and the experimental results are compared with the experimental and numerical results of the original shear wall. The obtained results indicate that the failure mode acquired by the numerical simulation is in considerable agreement with the test phenomena, which both are the bending failure modes. FRP can significantly improve the ultimate bearing resistance and bending stiffness of the shear walls, and the mid-span’s deflection response can be highly decreased. The PEN FRP reinforcement can provide much better anti-deformation capacity than that of PET FRP, thus reducing the impact damage of the shear wall. However, due to the better ductility of the PET FRP reinforcement, it has a wider application compared with the PEN FRP reinforcement. Furthermore, the energy dissipation capacity of the shear wall can be significantly improved by the FRP reinforcement, specifically, the efficiency of the PET FRP reinforcement is superior to PEN FRP.

导出引用

陈文龙1, 张君博2, 梁海志1, 王阳明3, 张纪刚1. LRS FRP加固既有人防剪力墙的抗冲击试验研究[J]. 振动与冲击, 2024, 43(18): 208-219

CHEN Wenlong1, ZHANG Junbo2, LIANG Haizhi1, WANG Yangming3, ZHANG Jigang1. Experimental study on the impact resistance of LRS FRP strengthened shear walls in the existing civil air defense engineering[J]. Journal of Vibration and Shock, 2024, 43(18): 208-219

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