含起波钢筋预制梁柱节点抗震性能试验

doi:10.13229/j.cnki.jdxbgxb.20221138

Abstract

Abstract:

In order to transfer the plastic hinge of prefabricated frame beam-column joints and avoid the "strong beam and weak column" failure mode caused by shear failure in the core area of the joints， a new type of prefabricated specimens and contrast pieces with kinded rebar were designed； The quasi-static loading test is carried out to compare and analyze the differences in hysteretic characteristics， stiffness， bearing capacity， energy dissipation and deformation capacity， and explore the seismic performance under low cycle reciprocating load. The results show that the overall deformation of the new joint is mainly caused by the deformation of the kinded rebar segment， and the core area is not damaged. The transfer of the plastic hinge is successfully realized， and the new joint has better energy dissipation and deformation capacity than the comparison specimen.

Key words: prefabricated beam-column joint, kinded rebar, plastic hinge, member deformation, seismic performance

CLC Number:

TU375.4

Yong-jun QIN,Qi CHEN,Chi ZHANG,Jian-hu WANG. Experiment on seismic performance of prefabricated beam-column joints with kinded rebar[J].Journal of Jilin University(Engineering and Technology Edition), 2024, 54(6): 1677-1687.

Figures/Tables 16

Table 1

Fig.1

Fig.2

Table 2

Fig.3

Table 3

Fig.4

Fig.5

Fig.6

Fig.7

Fig.8

Table 4

Specimen bearing capacity and displacement ductility coefficient"

试件	方向	$P y$ /kN	$Δ y$ /mm	$P m$ /kN	$Δ m$ /mm	$Δ u$ /mm	$R u$	$R y$	$μ$
RC0	正向	29.56	13.14	34.50	30.04	45.09	1/45	1.17	3.43
RC0	负向	29.99	22.68	32.30	70.00	70.00	1/29	1.08	3.09
PC0	正向	30.60	13.24	37.70	21.25	42.14	1/48	1.17	3.18
PC0	负向	37.07	18.45	42.70	70.00	70.00	1/29	1.15	3.79
RC30	正向	19.78	11.44	23.40	32.56	47.17	1/43	1.18	4.12
RC30	负向	24.97	18.83	33.80	70.00	70.00	1/29	1.35	3.72
PC30	正向	39.12	14.46	46.70	23.43	51.58	1/20	1.19	3.57
PC30	负向	37.23	20.16	42.10	70.00	70.00	1/29	1.13	3.47

Table 4

Fig.9

Table 5

Fig.10

Fig.11

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试件编号	梁截面尺寸/mm×mm	柱截面尺寸/mm×mm	轴压比	节点类型
RC0	150×280	250×250	0.2	-
RC30	150×280	250×250	0.2	起波钢筋
PC0	150×280	250×250	0.2	全灌浆套筒
PC30	150×280	250×250	0.2	起波钢筋+全灌浆套筒

混凝土等级	f_cu_，_k/MPa	f_c/MPa	?_tk/MPa	?_t/MPa
C40	52.6	35.2	3.7	2.6
C50	64.3	43	4.2	3.0

试件编号	E/（kN·m^-1）	η
RC0	44.7	1.00
PC0	63.9	1.43
RC30	80.8	1.81
PC30	92.1	2.06

Experiment on seismic performance of prefabricated beam-column joints with kinded rebar

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