Study on axial compression performance of palm-tenon spliced timber columns reinforced with BFRP sheets

被引：0

作者：

Xu J. ^{[1
]}

Jiang S. ^{[1
]}

Ge Z. ^{[1
]}

Lin E. ^{[2
]}

Lin J. ^{[3
]}

Fu C. ^{[4
]}

机构：

[1] College of Civil Engineering, Fuzhou University, Fuzhou

[2] Rongsheng Construction and Development Co., Ltd, Fuzhou

[3] Fujian Wuzhou Construction Group Co., Ltd, Quanzhou

[4] Fujian Academy of Building Research Co., Ltd, Fuzhou

来源：

Jianzhu Jiegou Xuebao/Journal of Building Structures | 2024年 / 45卷 / 03期

关键词：

axial bearing capacity; axial compression test; BFRP sheet; ductility; finite element analysis; palm-tenon splice joint;

D O I：

10.14006/j.jzjgxb.2022.0347

中图分类号：

学科分类号：

摘要：

In order to study the axial compression performance of palm-tenon spliced timber columns reinforced with BFRP sheets (referred to as the reinforced timber column), the axial compression test was carried out on 10 specimens, including seven splicing columns with different number of BFRP transverse and longitudinal fiber layers, one ke-ban splicing column and two intact timber columns. The failure characteristics and load-displacement curves of the columns were analyzed, and a comparison was made between the before- and after-reinforcement columns for the failure mode, strain state, bearing capacity, stiffness and ductility. In order to accurately calculate the displacement ductility coefficient of timber components, the ESEP method was proposed to determine the nominal yield point of timber column. The results show that the integrity of the splicing area is good for the specimens with composite reinforcement of BFRP, and the ultimate bearing capacity and stiffness of reinforced timber columns can be restored to 80% -90% level of intact timber columns, as well as ductility can be increased by 9% -90% . This indicates that the reinforced timber columns have good mechanical performance. The nominal yield displacement determined by ESEP method is reasonable and reliable, which can be used to determine the yield point of timber components. Furthermore, a numerical simulation model was established, and the validity of the model was verified by the experimental results. Based on the model, the effect of splice height (hd) and splice length (ld) on the reinforced timber column were analyzed. A calculation formula was derived for the axial compression capacity of the reinforced timber column. The finite element analysis shows that the bearing capacity decreases with the increase of hd, and ld has little effect on the bearing capacity. The maximum error between the calculated value and the test value is 12. 1% . The formula proposed in this paper can provide reference for the retrofitting of timber structures. © 2024 Science Press. All rights reserved.

引用

页码：197 / 207

页数：10

共 22 条

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