钢-聚丙烯混杂纤维混凝土剪力墙抗震性能

doi:10.13229/j.cnki.jdxbgxb20200095

Abstract

Abstract:

The mechanical characteristics of the steel-plypropylene hybrid fiber concrete （SPFRC） shear walls were studied by cyclic testing on two SPFRC shear walls and one reinforced concrete （RC） shear wall under reversed cyclic loading．The effects of fiber content and axial load ratio on the failure pattern， shear capacity， ductility and energy dissipation capacity of the shear walls are analyzed. The test results show that under the same axial load ratios， the hybrid fiber can effectively restrain the development of shear wall cracks， improve the shear capacity， deformation capacity and energy dissipation capacity of the shear wall. For hybrid fiber specimens， with the increase of axial load ratio from 0.1 to 0.2， the bearing capacity and ductility are improved， but the energy dissipation capacity declined. According to the mechanism of truss-slope lever mechanism， the SPFRC shear wall shear bearing capacity calculation equation was established， in which the contribution of horizontal and vertical distribution of rebar， concrete oblique lever and concealed columns to the shear-bearing capacity are taken into consideration. This equation is verified using domestic relevant data. The average value of the ratio between measured and calculated shear bearing capacity is 1.01 and the standard deviation is 0.17， which are well matched.

Key words: civil engineering, steel-polypropylene hybrid fiber, concealed column, shear wall, shear capacity, energy dissipation capacity, seismic performance

CLC Number:

TU528.01

Guang-tai ZHANG,Lu-yang ZHANG,Guo-hua XING,Yin-long CAO,Bao YI. Seismic performance of steel⁃polypropylene hybrid fiber reinforced concrete shear wall[J].Journal of Jilin University(Engineering and Technology Edition), 2021, 51(3): 946-955.

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试件编号	混凝土强度	水	水泥	砂	石	减水剂
SWC-0.1	C50	155	384	630	1100	5.76
SWH-0.1	C50	155	384	630	1100	6.24
SWH-0.2	C50	155	384	630	1100	6.24

钢筋种类	直径 /mm	屈服强度 /MPa	极限抗拉强度 /MPa
HRB400	6	505	710
HRB400	8	510	715
HRB500	12	650	820
HRB500	18	550	705
HRB500	25	530	705

试件编号	立方体抗压强度/MPa	轴心抗压强度/MPa	劈裂抗拉强度/MPa
P0S0	62.60	40.6	3.90
P1.2S0	65.89	42.7	4.66
P0S1.5	80.50	52.1	5.16
P1.2S1.5	82.70	54.8	5.96

试件编号	方向	开裂		屈服		峰值		极限		延性系数
试件编号	方向	荷载/kN	位移/mm	荷载/kN	位移/mm	荷载/kN	位移/mm	荷载/kN	位移/mm	延性系数
SWC-0.1	正向	186.08	1.80	408.78	8.94	491.60	15.82	441.35	17.24	1.77
	反向	189.95	2.80	352.98	7.89	427.94	11.79	371.18	13.82	1.75
	均值	188.02	2.30	380.86	8.42	459.77	13.81	406.27	15.53	1.76
SWH-0.1	正向	185.85	1.98	434.49	8.52	505.46	13.86	447.46	17.98	2.11
	反向	201.32	2.95	456.61	9.69	544.24	15.97	534.90	18.00	1.86
	均值	193.59	2.47	445.55	9.11	524.85	14.92	491.18	17.99	1.99
SWH-0.2	正向	333.10	2.95	575.29	6.89	655.22	10.88	556.94	13.22	1.92
	反向	377.10	4.04	630.26	8.55	638.35	17.51	542.60	19.53	2.28
	均值	355.10	3.50	602.78	7.72	646.79	14.20	549.77	16.38	2.10

试件编号	S_ABC+S_ADC/mm²	S_Δ_OBD+S_Δ_ODF/mm²	γ_e
SWC-0.1	3983.664	5577.629	0.114
SWH-0.1	9235.661	7999.702	0.184
SWH-0.2	5051.534	8014.535	0.101

Seismic performance of steel⁃polypropylene hybrid fiber reinforced concrete shear wall

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