含裂隙无腹筋梁的抗剪承载能力

doi:10.6040/j.issn.1672-3961.0.2021.004

摘要/Abstract

摘要：

分析混凝土梁内部既有裂隙的位置及角度对无腹筋梁抗剪承载力的影响, 制作多组含既有裂隙的试验梁, 进行梁的三点弯曲试验, 研究位于梁跨中和梁侧基本拱体范围内既有裂隙对无腹筋梁抗剪承载力的影响及裂缝扩展规律。结果表明: 梁上的既有裂隙对梁的抗剪承载力有削弱作用; 在其他条件相同的情况下, 梁跨中既有裂隙的裂尖距离梁底中部越近, 对无腹筋梁抗剪承载力的削弱作用越大; 梁侧既有裂隙的角度与基本拱体重合度越高, 对无腹筋梁抗剪承载力的削弱作用越大；梁侧既有裂隙的角度与基本拱体重合度越高, 梁底裂缝越容易扩展通过既有裂隙的两个裂尖, 反之, 梁底裂缝可扩展至既有裂隙中部。

关键词: 混凝土, 无腹筋梁, 既有裂隙, 抗剪承载力, 基本拱体

Abstract:

In order to investigate the effect of the position and angle of the pre-existing cracks on the shear capacity of beams without web reinforcement, a number of experiment beams with pre-existing cracks were fabricated, the three-point bending experiment of the beam was carried out. The influence of pre-existing cracks located in the basic arch of the beam span and the beam side on the shear capacity of beams without web reinforcement and the law of crack propagation were studied. The results showed that the pre-existing cracks on the beam had a weakening effect on the shear capacity of the beam, which made the beam more prone to diagonal tensile failure. Under the same conditions, when the crack tip of the pre-existing crack in the beam span was closer to the middle point of the bottom of the beam, the greater the weakening effect on the shear bearing capacity of the beam without web reinforcement. When the coincidence degree of the angle of the pre-existing cracks on the beam side and the basic arch was higher, the greater the weakening effect on the shear bearing capacity of the beam without web reinforcement, and the cracks at the bottom of the beam propagate through the two crack tips of the pre-existing cracks was easier. Conversely, the cracks at the bottom of the beam could extend to the middle of the pre-existing cracks.

Key words: concrete, beam without web reinforcement, pre-existing crack, shear capacity, basic arch

中图分类号:

TU375.1

刘文杰,杨学英,张波,范志鑫,李成新,杨惠茗,李景龙. 含裂隙无腹筋梁的抗剪承载能力[J]. 山东大学学报 (工学版), 2022, 52(3): 42-50.

Wenjie LIU,Xueying YANG,Bo ZHANG,Zhixin FAN,Chengxin LI,Huiming YANG,Jinglong LI. Shear capacity of beams with cracks and without web reinforcement[J]. Journal of Shandong University(Engineering Science), 2022, 52(3): 42-50.

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参考文献 24

1	Joint ACI-ASCE Committee 445 . Recent approaches to shear design of structural concrete[J]. Journal of Structural Engineering, ASCE, 1998, 124 (7): 853- 853.
2	KANI G . The riddle of shear failure and its solution[J]. ACI Structural Journal, 1964, 61 (4): 441- 468.
3	ZSUTTY Theodore . Shear strength prediction for separate catagories of simple beam tests[J]. Journal Proceedings, 1971, 68 (2): 138- 143.
4	张狄龙, 邸小坛. 不同破坏形态下混凝土无腹筋梁弯剪承载力计算研究[J]. 建筑科学, 2019, 35 (5): 1- 6. doi: 10.3969/j.issn.1673-2049.2019.05.001
	ZHANG Dilong , DI Xiaotan . Study and calculation of flexural-shear capacity of concrete beams without web reinforcement under different failure modes[J]. Building Science, 2019, 35 (5): 1- 6. doi: 10.3969/j.issn.1673-2049.2019.05.001
5	RUSSO Gaetano , SOMMA Giuliana , MITRI Denis . Shear strength analysis and prediction for reinforced concrete beams without stirrups[J]. Journal of Structural Engineering, 2005, 131 (1): 66- 74. doi: 10.1061/(ASCE)0733-9445(2005)131:1(66)
6	郑开启, 刘钊, 孟少平, 等. 一种无腹筋混凝土梁受剪承载力计算的新方法[J]. 东南大学学报(自然科学版), 2017, 47 (2): 362- 368.
	ZHENG Kaiqi , LIU Zhao , MENG Shaoping , et al. Novel calculation method for shear capacity of RC beams without web reinforcement[J]. Journal of Southeast University (Natural Science Edition), 2017, 47 (2): 362- 368.
7	BAZANT Z P , KIM J K . Size effect in shear failure of longitudinally reinforced beams[J]. Journal Proceedings, 1984, 81 (5): 456- 468.
8	魏巍巍, 贡金鑫. 钢筋混凝土构件基于修正压力场理论的受剪承载力计算[J]. 工程力学, 2011, 28 (2): 111- 117.
	WEI Weiwei , GONG Jinxin . Shear strength of reinforced concrete members based on modified compression field theory[J]. Engineering Mechanics, 2011, 28 (2): 111- 117.
9	王景全, 戚家南. 有腹筋与无腹筋钢筋混凝土梁抗剪承载力统一计算方法[J]. 土木工程学报, 2013, 46 (7): 47- 57.
	WANG Jingquan , QI Jianan . Unified shear strength computation model for reinforced concrete beams with and without stirrups[J]. China Civil Engineering Journal, 2013, 46 (7): 47- 57.
10	黄靓, 徐紫鹏, 鲁懿虬. 弯剪共同作用下钢筋混凝土梁承载力计算方法的研究[J]. 工程力学, 2012, 29 (12): 302- 306. doi: 10.6052/j.issn.1000-4750.2011.03.0100
	HUANG Liang , XU Zipeng , LU Yiqiu . Research of calculated method of bearing capacity for reinforced concrete member under shear and bending[J]. Engineering Mechanics, 2012, 29 (12): 302- 306. doi: 10.6052/j.issn.1000-4750.2011.03.0100
11	王英, 顾祥林, 林峰. 考虑压拱效应的钢筋混凝土双跨梁竖向承载力分析[J]. 建筑结构学报, 2013, 34 (4): 32- 42.
	WANG Ying , GU Xianglin , LIN Feng . Vertical bearing capacity of RC two-bay beams considering compressive arch action[J]. Journal of Building Structures, 2013, 34 (4): 32- 42.
12	梁兴文, 史庆轩. 混凝土结构设计原理[M]. 北京: 中国建筑工业出版社, 2011.
13	徐世烺, 赵国藩. 混凝土结构裂缝扩展的双K断裂准则[J]. 土木工程学报, 1992, (2): 32- 38.
	XU Shilang , ZHAO Guofan . A double-K fracture criterion for the crack propagation in concrete structures[J]. China Civil Engineering Journal, 1992, 25 (2): 32- 38.
14	王璀瑾, 董伟, 王强, 等. 混凝土Ⅰ型裂缝扩展准则比较研究[J]. 工程力学, 2016, 33 (5): 89- 96.
	WANG Cuijin , DONG Wei , WANG Qiang , et al. A comparative study on propagation criterion of concrete mode I crack[J]. Engineering Mechanics, 2016, 33 (5): 89- 96.
15	荣华, 董伟, 吴智敏, 等. 大初始缝高比混凝土试件双K断裂参数的试验研究[J]. 工程力学, 2012, 29 (1): 162- 167.
	RONG Hua , DONG Wei , WU Zhimin , et al. Experimental investigation on double-k fracture param-eters for large initial crack-depth ratio in concrete[J]. Engineering Mechanics, 2012, 29 (1): 162- 167.
16	尹阳阳, 胡少伟, 王宇航. 自重对混凝土三点弯曲梁断裂性能的影响[J]. 工程力学, 2019, 36 (7): 48- 56.
	YIN Yangyang , HU Shaowei , WANG Yuhang . Influence of self-weight on the fracture properties of three-point bending concrete beams[J]. Engineering Mechanics, 2019, 36 (7): 48- 56.
17	李清, 张迪, 杨阳, 等. 含单侧预制裂纹梁的冲击动态断裂过程试验研究[J]. 振动与冲击, 2015, 34 (4): 205- 210.
	LI Qing , ZHANG Di , YANG Yang , et al. Dynamic fracture tests for a beam containing unilateral pre-existing cracks under impact loads[J]. Journal of Vibration and Shock, 2015, 34 (4): 205- 210.
18	岳中文, 宋耀, 邱鹏, 等. 冲击载荷下双预置裂纹三点弯曲梁动态断裂实验[J]. 振动与冲击, 2017, 36 (4): 151- 156.
	YUE Zhongwen , SONG Yao , QIU Peng , et al. A dynamic fracture experiment of a three-point-bend beam containing double pre-existing cracks under impact load[J]. Journal of Vibration and Shock, 2017, 36 (4): 151- 156.
19	梅比. 含圆孔缺陷三点弯曲梁的裂纹扩展特性实验研究[J]. 振动与冲击, 2020, 39 (5): 74- 80.
	MEI Bi . Tests for crack propagation characteristics of three-point bending beam with circular hole defect[J]. Journal of Vibration and Shock, 2020, 39 (5): 74- 80.
20	夏雨, 周诗博, 龙嘉欣, 等. 基于扩展有限元法的钢筋混凝土梁裂纹扩展的数值模拟[J]. 力学与实践, 2018, 40 (3): 281- 288.
	XIA Yu , ZHOU Shibo , LONG Jiaxin , et al. numerical simulation of crack growth of reinforced concrete flexural members based on XFEM[J]. Mechanics in Engineering, 2018, 40 (3): 281- 288.
21	易伟建, 王昱, 邓清. 骨料粒径对无腹筋梁抗剪性能影响的试验研究[J]. 湖南大学学报(自然科学版), 2014, 41 (11): 1- 7.
	YI Weijian , WANG Yu , DENG Qing . Experimental study on aggregate size role in shear strength of reinforced concrete beams without shear reinforcement[J]. Journal of Hunan University(Natural Sciences), 2014, 41 (11): 1- 7.
22	陶齐宇, 张义志. 混凝土结构的拉-压杆模型设计方法[J]. 西南公路, 2017, (1): 35- 41.
	TAO Qiyu , ZHANG Yizhi . Design method of strut-and-tie model of concrete structure[J]. Southwest Highway, 2017, (1): 35- 41.
23	刘立渠, 王娟娟, 杨润林, 等. 压杆强度在混凝土深梁的应用研究[J]. 建筑结构学报, 2010, 31 (增刊1): 315- 318.
	LIU Liqu , WANG Juanjuan , YANG Runlin , et al. The strength of struts in the reinforced concrete deep beams[J]. Journal of Building Structures, 2010, 31 (Suppl.1): 315- 318.
24	RIGOTTI Marco. Diagonal cracking in reinforced concrete deep beams: an experimental investigation[D]. Montreal, Canada: Concordia University, 2003.

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工况编号	裂隙位置	裂隙角度/(°)
工况1	—	—
工况2	梁跨中(L/2处)	0
工况3	梁跨中(L/2处)	45
工况4	梁跨中(L/2处)	90
工况5	梁侧(5L/16处)	0
工况6	梁侧(5L/16处)	30
工况7	梁侧(5L/16处)	45
工况8	梁侧(5L/16处)	60
工况9	梁侧(5L/16处)	90
工况10	梁侧(5L/16处)	120
工况11	梁侧(5L/16处)	135
工况12	梁侧(5L/16处)	150

工况编号	极限荷载/ kN	极限荷载值的变化幅度/%	梁底最大应变/10^-6
工况1	14.78	对照组	1 392.00
工况2	12.42	-16.0	1 184.00
工况3	11.13	-24.7	988.00
工况4	9.76	-34.0	784.00
工况5	8.90	-39.8	695.00
工况6	7.41	-49.9	643.00
工况7	8.52	-42.4	728.00
工况8	10.68	-27.7	904.00
工况9	11.97	-19.0	1 195.00
工况10	14.69	-0.6	1 259.00
工况11	12.80	-13.4	1 204.00
工况12	13.98	-5.4	1 380.00

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