3-D FEM Analysis on Prefabricated Segment Joints of Shield Tunnel

doi:10.16183/j.cnki.jsjtu.2003.04.023

Abstract

Abstract:

The double lines strengthening elastic-plastic model was developed by simplifying the concrete constitutive law according to Saenz formula. The formulae for the model parameters were given. The structural analysis procedure Algor was taken to conduct the linear elastic and elastic-plastic FEM analysis on the joints of segments. The strain distribution of segment, the displacement of joints, the rotary angle of joints and the tensile force of joint bolts were given. The comparison between FEM calculation and test results was made, which shows that the finite element analysis results correspond with the test results. The FEM analysis results can bean effective measure to observe the distribution patterns of the strain and stress.

Key words: loading test, constitutive model, shield tunnel, finite element analysis

CLC Number:

TU621

ZHANG Hou-mei, ZHANG Zheng-lin, WANG Jian-hua. 3-D FEM Analysis on Prefabricated Segment Joints of Shield Tunnel[J]. Journal of Shanghai Jiao Tong University, 2003, 37(04): 566-569.

Figures/Tables 9

Fig. 1

Tab. 1

Tab. 2

Fig. 2

Tab. 3

Fig. 3

Fig. 4

Tab. 4

Fig. 5

References 5

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类型	构件名称	最大尺寸/cm
3D实体	混凝土	长×宽×高=11×10×14.67
板	衬垫	长×宽×厚=11×10×0.3
杆	螺栓	直径×长度=3.6×26
接触	接缝	接触长度= 0.1

材料	d/(g·cm^-3)	E/GPa	g
混凝土(C50)	2.50	35	0.20
衬垫(软木橡胶)	0.70	0.25	0.35
螺栓(40Cr)	7.80	210	0.30

?	X_V
?	0.17	0.34	0.51	0.65	0.77	0.94
K_ld	17.1	22.1	25.7	49.2	78.2	134.9
K_un	15.4	19.2	22.8	42.7	68.4	112.7
G_ld	12.3	15.9	18.5	35.5	56.3	97.3

弯矩/ (kN·m)	正弯矩		误差/%	负弯矩		误差/%
弯矩/ (kN·m)	计算值	试验值	误差/%	计算值	试验值	误差/%
144	97.3	225	- 56.7	376.8	276	36.5
216	168.2	322	- 47.7	627.5	512	22.5
288	264.2	449	- 41.1	887.1	761	16.5
324	320.2	528	- 39.3	1 040	917	13.4
K_θ	75 000	56 700	32.3	27 700	28 900	- 4.2

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