Experimental and numerical investigations into mechanical Performance of key connections in multi-story timber frame structures with cross laminated timber (CLT) shear walls

被引：0

作者：

Li, Zheng ^{[1
]}

Wang, Ziwei ^{[1
]}

He, Minjuan ^{[1
]}

Han, Qianwen ^{[2
]}

Liu, Qing ^{[3
]}

机构：

[1] College of Civil Engineering, Tongji Univeraity, Shanghai

[2] Tongji Architectural Design (Group) Co., Ltd., Shanghai

[3] Shanghai Tongji Green Building Prefahrication Construction Engineering Technology Co., Ltd., Shanghai

来源：

Tumu Gongcheng Xuebao/China Civil Engineering Journal | 2024年 / 57卷 / 11期

关键词：

cross laminated timber; eonneetions; glulam timber frame; numerical Simulation; pseudo static tests;

D O I：

10.15951/j.tmgexb.23060536

中图分类号：

学科分类号：

摘要：

Glulam frame structures can provide open space and cross laminated timber (CLT) shear wall structures can provide large lateral stiffness. A structural System combining the two Systems was proposed, and two types of key connections, namely CLT shear wall to CLT floor connection (shear wall-floor connection) and CLT shear wall to glulam beam connection (shear wall-beam connection), were studied. Shear test and pullout test were respectively conducted for the self-tapping screws and the wall-floor connections. And bending-shear test was conducted for the shear wall-beam connections. Results showed that the shear ductility of self-tapping screws was good, the load-displacement curve had obvious elastic and plastic stages, while the pullout ductility of self-tapping sorews was poor to some extent. The typioal failure modes of the shear tests of the shear wall-floor eonneetions were screw pullout, serew fracture and wood Splitting, and the bearing capaeity dropped suddenly after reaching the peak load resisting capacity. The typical failure modes of pullout tests were screw pullout and timber eompression failure, and the pullout tests had higher initial stiffness and better ductility. The typical failure mode of the shear wall-beam eonneetions was screw pullout with good ductility, but the pinching effect was observed in the hysteretic curves. According to the test results, the mechanical properties of self-tapping screws, shear wall-floor eonneetions and shear wall-beam eonneetions were calculated. The shear and pullout capacity of the shear wall-floor connection were 26.66 kN and 21.50 kN, respectively. The mean values of bearing capacity, elastic stiffness and ductility coefficient of shear wall-beam eonneetions were 10.89 kN: m, 459.40 kN: m /rad and 3.68, respectively. Moreover, finite element simulations of the two types of key eonneetions were carried out, in which the numerical Simulation results were in good agreement with the experimental ones. The research results can provide reference for the application of such structural System. © 2024 Chinese Society of Civil Engineering. All rights reserved.

引用

页码：1 / 13

页数：12

共 20 条

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