剪力钉连接件拉剪共同作用抗剪性能

doi:10.13229/j.cnki.jdxbgxb.20211243

Abstract

Abstract:

In order to understand the mechanical properties of shear stud connectors under combined tension and shear loading， five groups of model tests were tested， including uniaxial pull-out tests， uniaxial push-out tests， and combined tension and shear loading tests. Combined with finite element models， influence of concrete strength and stud size on shear capacity were analyzed， and the load-slip relationship， the ultimate shear capacity formula of shear stud connectors under tension and shear loading were proposed. The results show that as the applied tensile force ratio increase to 0.6， the shear stiffness reduces 69%； and the ratio of ultimate elastic capacity to ultimate shear capacity reduces from 0.55 to 0.24， and the ultimate shear capacity reduces 31%. The effects of concrete strength and tensile force ratio on the shear capacity of shear stud connectors are correlated. The proposed load-slip relationship and ultimate shear capacity formula under tension and shear loading can be applied to engineering design and calculation.

Key words: bridge engineering, steel concrete composite beam, shear stud connector, shear stiffness, load-slip curve, ultimate shear capacity

CLC Number:

U443.3

Ran AN,You-zhi WANG. Shear properties of shear stud connectors under combined tension and shear loading[J].Journal of Jilin University(Engineering and Technology Edition), 2023, 53(9): 2554-2562.

Figures/Tables 13

Fig.1

Table 1

Fig.2

Fig.3

Table 2

Fig.4

Fig.5

Fig.6

Fig.7

Table 3

Fig.8

Table 4

Shear and tension interaction relations of shear stud connectors"

文献来源	拉剪相关关系式	公式编号
文献［14］	$V V u 53 + T T u 53 ≤ 1$	（6）
文献［19］	$V = V u, T ≤ 0.1 T u V V u + 0.5 2 + T T u + 0.5 2 ≤ 2.61, ????? T > 0.1 T u$	（7）
文献［22］	$V V u 2 + T T u 2 ≤ 1$	（8）
文献［23］	$V = V u, T ≤ 0.2 T u V V u + T T u ≤ 1.2, T > 0.2 T u$	（9）

Table 4

Table 5

References 24

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试件编号	混凝土抗压强度f_c/MPa	剪力钉规格d×h	配筋	λ
S_1-1，S_1-2	66.34	16 mm×90 mm	?12@ 110	0
PS_1-1，PS_1-2	63.02			0.4
PS_2-1，PS_2-2	58.93			0.5
PS_3-1，PS_3-2	60.44			0.6
P₁	62.07			—

试件	T/kN	T_u/kN	λ（λ=T/T_u）	V/kN	V_u/kN	V/V_u	s_u/mm	k_e/（kN·mm^-1）	V_e/V
S_1-1	—	— — — — — — — — —	0.00	199.8	205.0 205.0 205.0 205.0 205.0 205.0 205.0 205.0 205.0	1.00	4.982	557.8	0.54
S_1-2	—		0.00	210.0		1.00	4.122	565.5	0.56
PS_1-1	33		0.40	176.2		0.86	4.686	299.5	0.34
PS_1-2	33		0.40	168.4		0.82	6.015	290.2	0.35
PS_2-1	41		0.50	162.3		0.79	5.672	210.6	0.26
PS_2-2	41		0.50	154.7		0.75	4.714	232.0	0.30
PS_3-1	50		0.60	145.3		0.70	3.948	167.1	0.22
PS_3-2	50		0.60	140.4		0.68	5.312	182.5	0.26
P₁	—	82.3	—	—	—	—	—	—	—

混凝土强度/MPa	λ
混凝土强度/MPa	0.2	0.3	0.4	0.5	0.6
30	0.95	0.94	0.93	0.92	0.90
40	0.96	0.95	0.94	0.93	0.91
50	0.98	0.97	0.95	0.94	0.93
60	1.00	1.00	1.00	0.99	0.98

数据来源	试件/有限元数量	式（6）		式（7）		式（8）		式（9）		式（10）
数据来源	试件/有限元数量	μ	η	μ	η	μ	η	μ	η	μ	η
文献［10］	1	0.909	0.000	0.848	0.000	1.376	0.000	0.938	0.000	1.050	0.000
文献［11］	12	0.917	0.032	0.862	0.074	1.274	0.274	0.941	0.014	0.983	0.021
文献［13］	32	0.840	0.054	0.740	0.054	1.608	0.054	0.887	0.054	1.021	0.051
本文	30	1.007	0.046	0.926	0.028	1.620	0.107	1.044	0.009	1.101	0.022

Shear properties of shear stud connectors under combined tension and shear loading

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