板簧式减震锚头结构及抗震性能分析

doi:10.13229/j.cnki.jdxbgxb.20221430

Abstract

Abstract:

Aiming at the problems of non-toughness and weak disaster resistance of the anchor cable system under the condition of seismic slip on high and steep slopes， a leaf spring shock absorption anchor head structure and implementation method were proposed. The seismic working program of leaf spring anchor head was analyzed， a dynamic calculation model was constructed， and the deformation characteristics were analyzed. Based on the main influencing indicators， the scale analysis of the leaf spring anchor head was carried out， and the seismic response characteristics of the leaf spring anchor head were obtained by finite element program. The results show that the bearing capacity and deformation characteristics of the leaf spring anchor head structure are mainly determined by the aspect ratio， width-thickness ratio， span and number of plates， and are most sensitive to the thickness of the plates. With the increase of excitation peaks， the shorter the recovery time of its springback， the more energy is dissipated throughout the process. The optimal scale leaf spring anchor head seismic response Fourier main frequency is 14.73Hz， reciprocating deformation and frictional energy loss occur during the seismic response process to reduce the seismic impact effect， with good seismic performance and toughness， but the application design should comprehensively consider the deformation coordination ability， energy dissipation effect and economic factors. The research results can provide a theoretical basis and method for the design and application of slope anchor cable toughness component structure.

Key words: new type anchor cable, plate spring damping, slope treatment, seismic performance

CLC Number:

TB122

Lin-feng WANG,Wan-chun XIA,Lang XU,Xiao-ming HUANG,Guo-jin TAN,Ji-xu ZHANG. Structure and seismic performance analysis of plate spring damping anchor head[J].Journal of Jilin University(Engineering and Technology Edition), 2023, 53(6): 1842-1852.

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因素水平	弧高 h/mm	片板数n/片	弦长 L/mm	片板宽 b/mm	片板厚δ/mm
因素水平	A	B	C	D	E
1	50	2	300	90	8
2	45	3	280	110	10
3	40	3	260	130	12
4	40	4	240	150	13

方案	A	B	C	D	E	w_c/mm	K/（kN·mm^-1）
1	50	2	300	90	8	21.26	16.44
2	50	3	280	110	10	12.16	36.61
3	50	3	260	130	12	10.96	43.26
4	50	4	240	150	13	9.61	99.45
5	45	2	280	130	13	10.44	56.33
6	45	3	300	150	12	12.27	49.92
7	45	3	240	90	10	11.08	29.95
8	45	4	260	110	8	14.73	20.59
9	40	2	260	150	10	10.85	33.28
10	40	3	240	130	8	12.53	18.25
11	40	3	300	110	13	11.40	71.50
12	40	4	280	90	12	13.25	39.94
13	40	2	240	110	12	10.80	24.41
14	40	3	260	90	13	10.63	58.50
15	40	3	280	150	8	15.28	21.06
16	40	4	300	130	10	13.14	57.69

参数	A		B		C		D		E
参数	w_c/mm	K/（kN·mm^-1）	w_c/mm	K/（kN·mm^-1）	w_c/mm	K/（kN·mm^-1）	w_c/mm	K/（kN·mm^-1）	w_c/mm	K/（kN·mm^-1）
均值Ⅰ	13.50	48.94	13.34	32.62	14.52	48.89	14.06	36.21	15.95	19.09
均值Ⅱ	12.13	39.20	11.90	40.82	12.78	38.48	12.27	38.28	11.81	39.38
均值Ⅲ	12.01	40.74	12.18	41.44	11.79	38.91	11.77	43.88	11.82	39.38
均值Ⅳ	12.46	40.41	12.68	54.42	11.01	43.02	12.00	50.93	10.52	71.45
极差R	1.49	9.74	1.44	21.80	3.51	10.40	2.29	14.72	5.43	52.36

模拟结果模拟工况	总变形/mm	变形耗能/kJ	等效应力/MPa	等效应变
A3-B2-C2-D1-E1
A2-B2-C2-D1-E1
A2-B1-C3-D2-E4
A2-B2-C3-D2-E4

Structure and seismic performance analysis of plate spring damping anchor head

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