负弯矩作用下可拆卸预制装配式组合梁力学性能试验

doi:10.13229/j.cnki.jdxbgxb20200825

吉林大学学报(工学版) ›› 2022, Vol. 52 ›› Issue (3): 604-614.doi: 10.13229/j.cnki.jdxbgxb20200825

• 交通运输工程·土木工程 • 上一篇

负弯矩作用下可拆卸预制装配式组合梁力学性能试验

陈俊¹(),王韶纤¹,胥卉¹,莫端泉²,霍静思³,邓旭华¹()

^1.湘潭大学土木工程与力学学院，湖南湘潭 411105
^2.湖南恒运建筑科技发展有限公司，湖南湘潭 411101
^3.华侨大学土木工程学院，福建厦门 361021

收稿日期:2020-10-29 出版日期:2022-03-01 发布日期:2022-03-08
通讯作者: 邓旭华 E-mail:chenjun0325@126.com;903074106@qq.com
作者简介:陈俊（1973-），男，教授，博士. 研究方向：装配式结构. E-mail：chenjun0325@126.com
基金资助:
国家自然科学基金项目(51678256);湖南省创新型省份建设专项项目(2019RS1059);湖南省教育厅科学研究重点项目(21A0073)

Experiment on mechanical properties of detachable prefabricated composite beams subjected to negative bending moment

Jun CHEN¹(),Shao-xian WANG¹,Hui XU¹,Duan-quan MO²,Jing-si HUO³,Xu-hua DENG¹()

^1.College of Civil Engineering and Mechanics，Xiangtan University，Xiangtan 411105，China
^2.Hunan Hengyun Construction Technology Development Co. ，Ltd. ，Xiangtan 411101，China
^3.College of Civil Engineering，Huaqiao University，Xiamen 361021，China

Received:2020-10-29 Online:2022-03-01 Published:2022-03-08
Contact: Xu-hua DENG E-mail:chenjun0325@126.com;903074106@qq.com

摘要/Abstract

摘要：

以抗剪连接度和是否脱黏处理为试验参数，设计了4根可拆卸预制装配式组合梁并研究了其在负弯矩作用下的力学性能。试验结果表明：①剪力连接度的提升可以改善可拆卸式组合梁在负弯矩作用下的抗裂性能，但是对其极限承载力和刚度影响不大；②对抗剪连接件进行局部脱黏处理可以改善可拆卸式组合梁在负弯矩作用下的力学性能，延缓裂缝的发展，并且对试件的刚度、极限承载力影响较小，且该处理对于完全剪力连接的试件改善效果更为明显；③可拆卸式组合梁在负弯矩作用下的转动能力依然有较大的提升空间，脱黏处理和抗剪连接度的提升都可以改善组合梁的转动能力，可以对此进行进一步的优化。

关键词: 建筑结构, 组合结构, 组合梁, 负弯矩, 脱黏处理

Abstract:

Four detachable prefabricated composite beams are designed and their mechanical properties under the action of negative bending moment are studied by taking shear connection degree and debonding treatment as test parameters. The test results show that：①the shear coupling degree can improve the anti-cracking performance of the detachable composite beam under the action of negative bending moment， but it has little influence on its ultimate bearing capacity and stiffness. ②Partial debonding treatment of anti-shear joints can improve the mechanical properties of detachable composite beams under the action of negative bending moment， delay the development of cracks， and have little influence on the stiffness and ultimate bearing capacity of specimens. However， this treatment has a more obvious effect on the improvement of specimens with complete shear connections. ③Under the action of negative bending moment， the rotation capacity of the detachable composite beam still has a large room for improvement. Both the debonding treatment and the increase of shear connection degree can improve the rotation capacity of the composite beam， which can be further optimized.

Key words: building structure, composite structure, composite beams, negative bending moment, debonding treatment

中图分类号:

TU398.9

陈俊,王韶纤,胥卉,莫端泉,霍静思,邓旭华. 负弯矩作用下可拆卸预制装配式组合梁力学性能试验[J]. 吉林大学学报(工学版), 2022, 52(3): 604-614.

Jun CHEN,Shao-xian WANG,Hui XU,Duan-quan MO,Jing-si HUO,Xu-hua DENG. Experiment on mechanical properties of detachable prefabricated composite beams subjected to negative bending moment[J]. Journal of Jilin University(Engineering and Technology Edition), 2022, 52(3): 604-614.

图/表 17

表1

图1

图2

表2

图3

图4

图5

表3

试验情况汇总表"

试验状态		PHBCB-UB	PHBCB-B	PHBCB-B-S	PHBCB-UB-S
开裂状态	$P 1 / k N$	70	60	76	74
	$P 2 / k N$	120	60	90	150
	$P 3 / k N$	180	90	120	180
	$P 1 / P u$	0.153	0.138	0.166	0.164
	$P 2 / P u$	0.263	0.138	0.196	0.333
	$P 3 / P u$	0.394	0.207	0.262	0.400
	$S 60 / m m$	0.010	0.002	0.002	0.005
$ω l i m$ 状态	$P L / 200 / k N$	375.1	360	391.8	385.6
	$P L / 200 / P u$	0.822	0.827	0.855	0.857
	$ω L / 200 / m m$	13.5	13.5	13.5	13.5
	$a 360 / m m$	0.77	1.23	0.82	0.71
	$S 360 / m m$	0.35	0.573	0.401	0.118
$P u / 2$ 状态	$P u / 2 / k N$	228.2	217.6	229.3	225.1
	$ω 0.5 P u / m m$	5.268	5.458	4.437	4.637
	$ω 0.5 P u / L$	1/513	1/495	1/610	1/580
	$a 240 / m m$	0.39	0.55	0.387	0.387
	$S 240 / m m$	0.193	0.306	0.138	0.054
承载力极限状态	$P u / k N$	456.4	435.3	458.5	450.1
	$ω P u / m m$	35.982	43.31	33.436	36.409
	$ω P u / L$	1/75	1/62	1/81	1/76
	$a 破坏后 / m m$	11.11	13.3	15.6	15
	$S P u / m m$	0.799	0.882	0.812	0.271

表3

图6

图7

图8

图9

图10

图11

表4

特征弯矩"

试件型号	$M c r / (k N ? m)$	$M y / (k N ? m)$	$M p / (k N ? m)$	$M u / (k N ? m)$	$M c r$	$M y / M u$	$M p / M u$
PHBCB-UB	47.25	243	279	308.070	0.153	0.788	0.905
PHBCB-B	40.5	214.9875	279	293.827	0.137	0.731	0.949
PHBCB-B-S	51.3	250.425	279	309.487	0.165	0.809	0.901
PHBCB-UB-S	49.95	244.89	279	303.817	0.164	0.806	0.918

表4

表5

转动能力R值"

试件型号	$θ p$	$θ u$	$R = θ u θ p - 1$
PHBCB-UB	0.752	1.869	1.485
PHBCB-B	0.980	2.227	1.272
PHBCB-B-S	0.825	2.150	1.606
PHBCB-UB-S	0.815	2.160	1.649

表5

表6

刚度及挠度对比"

试件编号	荷载/kN	试验刚度/（ $1013 ? N ? m m 2$ ）	计算刚度/（ $1013 ? N ? m m 2$ ）	试验刚度/计算刚度	实测挠度/mm	未修正计算挠度/mm	挠度修正量/mm	修正后计算挠度/mm	修正前计算挠度∶实测挠度/%	修正后计算挠度∶实测挠度/%
PHBCB-UB	360.0	1.634	2.04	0.810	9.03	7.25	0.480	7.73	80.28	85.63
PHBCB-B	318.5	1.952	2.04	0.967	6.69	6.42	0.427	6.84	95.88	102.27
PHBCB-B-S	371.0	1.636	2.02	0.811	9.30	7.54	0.394	7.93	81.07	85.31
PHBCB-UB-S	362.8	1.870	2.02	0.827	7.95	7.37	0.385	7.76	92.68	97.53

表6

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钢材类型		屈服强度/MPa	极限强度/MPa
钢筋	C6	417.89	742.89
钢筋	C8	377.50	683.99
钢筋	C10	476.93	612.81
钢筋	C12	535.22	654.37
钢梁	翼缘	286.40	419.90
钢梁	腹板	338.04	458.01
连接件	高强螺栓	663.00	835.00

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负弯矩作用下可拆卸预制装配式组合梁力学性能试验

Experiment on mechanical properties of detachable prefabricated composite beams subjected to negative bending moment

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试件编号	预制板设计强度/MPa	连接件个数	连接件直径/mm	是否脱黏处理	连接件纵向间距/mm	抗剪连接度	预紧力/kN
PHBCB-UB-S	40	36	16	是	150	1.38	25
PHBCB-B-S	40	36	16	否	150	1.38	25
PHBCB-UB	40	26	16	是	210	1	25
PHBCB-B	40	26	16	否	210	1	25