Effects of axial compression ratio on aseismic performance of RC beam-column joint under rapid loading
YANG Tiange1, FAN Guoxi1, WANG Ye1, WANG Debin2, SHANG Huaishuai3
1. College of Engineering, Ocean University of China, Qingdao 266100, China;
2. School of Civil and Safety Engineering, Dalian Jiaotong University, Dalian 116028, China;
3. School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China
At present, most beam-column joint’s aseismic performance studies are quasi-static test ones, dynamic test studies are less. Here, rapid loading tests were conducted for 4 beam-column joint combination specimens to study the effects of axial compression ratio on aseismic performance of beam-column joint under rapid loading. In addition, based on the softened strut-and-tie model, Coulomb failure criterion, Mohr’s circle theory and the mechanical model of joint combination, the calculation model of concrete shear strength was derived under the shear-compression composite stress state. The study showed that the softened strut-and-tie model can be used to predict the anti-shear load-bearing ability and failure modes of joint combination; the calculation model of concrete shear strength can be used to predict effect laws of axial compression ratio on anti-shear load-bearing ability of joint combination considering material strain rate effect; joint combinations have same failure modes and crack types under different axial compression ratios, however, with increase in axial compression ratio, number of cracks, shear deformation and angle between oblique crack and vertical axial force in joint core zone gradually decrease, transfers of joint combination’s serious damage parts happen; forward loading’s loop line stiffness is always larger than reverse loading’s one under the same displacement level; with increase in axial compression ratio, anti-shear load-bearing ability of joint combination increases, but the effect is not obvious; increase in axial compression ratio is beneficial to energy dissipation of joint combination.
杨天戈1，范国玺1,王也1，王德斌2,商怀帅3. 快速加载下轴压比对RC梁柱节点抗震性能的影响[J]. 振动与冲击, 2019, 38(11): 271-278.
YANG Tiange1, FAN Guoxi1, WANG Ye1, WANG Debin2, SHANG Huaishuai3. Effects of axial compression ratio on aseismic performance of RC beam-column joint under rapid loading. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(11): 271-278.
[1] Ghosh S K, Cleland N. Observations from the february 27, earthquake in Chile[J]. PCI Journal, 2012, 57(1): 52–75.
[2] Khare R K, Maniyar M M, Uma S R, et al. Seismic performance and design of precast concrete building structures: an overview[J]. Journal of Structural Engineering, 2011, 38(3): 272-284.
[3] Arslan M H, Korkmaz H H, Gulay F G. Damage and failure pattern of prefabricated structures after major earthquakes in Turkey and shortfalls of the Turkish Earthquake code[J]. Engineering Failure Analysis, 2006, 13 (4): 537-557.
[4] Wang Y Y. Lessons learned from the "5.12" Wenchuan Earthquake: evaluation of earthquake performance objectives and the importance of seismic conceptual design principles[J]. Earthquake Engineering and Engineering Vibration, 2008, 7(3): 255-262.
[5] Alexander D E. The L’Aquila earthquake of 6 April 2009 and Italian government policy on disaster response[J]. Journal of Natural Resources Policy Research, 2010, 2(4):325–342.
[6] Sarno L D, Yenidogan C, Erdik M. Field evidence and numerical investigation of the Mw=7.1 October 23 Van, Tabanlı and the MW>5.7 November earthquakes of 2011[J]. Bulletin of Earthquake Engineering, 2013, 11: 313-346.
[7] Savoia M, Buratti N, Vincenzi L. Damage and collapses in industrial precast buildings after the 2012 Emilia earthquake[J]. Engineering Structures, 2017, 137: 162-180.
[8] Kagermanov A, Ceresa P, Morales E, et al. Seismic performance of RC buildings during the MW7.8 Muisne (Ecuador) earthquake on April 2016: field observations and case study[J]. Bulletin of Earthquake Engineering, 2017, DOI 10.1007/s10518-017-0182-y.
[9] Akpinar E, Atalay H M, Ozden S, et al. Performance of precast concrete structures in October 2011 Van earthquake, Turkey[J]. Magazine of Concrete Research, 2014, 66(11): 543-552.
[10] Kongar I, Esposito S, Giovinazzi S. Post-earthquake assessment and management for infrastructure systems: learning from the Canterbury (New Zealand) and L’Aquila (Italy) earthquakes[J]. Bulletin of Earthquake Engineering, 2017, 15: 589-620.
[11] Hall J. Northridge earthquake, preliminary reconnaissance report[R]. Oakland: Earthquake Engineering Research Institute, 1994.
[12] 周威, 郑文忠, 佟佳颖, 等. 汶川地震中房屋震害分析与震损房屋抗震加固[J]. 哈尔滨工业大学学报, 2013, 45(12): 1-9.
Zhou Wei, Zheng Wenzhong, Tong Jiaying, et al. Seismic strengthening and damage analysis of buildings in Wenchuan earthquake[J]. Journal of Harbin Institute of Technology, 2013, , 45(12): 1-9. (in Chinese)
[13] Bischoff P H, Perry S H. Compressive behaviour of concrete at high strain rates[J]. Material and Structures, 1991, 24(6): 425-450.
[14] Follansbee P S, Kocks U F. A constitutive description of the deformation of copper based on the use of the mechanical threshold stress as an internal state variable[J]. Acta Metallurgica, 1988, 36(1): 81-93.
[15] 师燕超, 李忠献. 爆炸荷载作用下钢筋混凝土柱的动力响应与破坏模式[J]. 建筑结构学报, 2008, 29(4): 112-117.
Shi Yanchao, Li Zhongxian. Dynamic responses and failure modes of RC columns under blast loading[J]. Journal of Building Structures, 2008, 29(4): 112-117. (in Chinese)
[16] Bhowmick A K, Driver R G, Grondin G Y. Seismic analysis of steel plate shear walls considering strain rate and P-delta effects[J]. Journal of Constructional Steel Research, 2009, 65(5): 1149-1159.
[17] 李振宝, 宝小超. 加载速率对钢筋混凝土梁动态性能的影响[J]. 防灾减灾工程学报, 2011, 31(6): 627-631.
Li Zhenbao, Bao Xiaochao. Effect of loading rate on the dynamic properties of reinforced concrete beams[J]. Journal of Disaster Prevention and Mitigation Engineering, 2011, 31(6): 627-631. (in Chinese)
[18] Lamarche C P, Tremblay R. Seismically induced cyclic buckling of steel columns including residual-stress and strain-rate effects[J]. Journal of Constructional Steel Research, 2011, 67(9): 1401-1410.
[19] Asprone D, Frascadore R, Di Ludovico M, et al. Influence of strain rate on the seismic response of RC structures[J]. Engineering Structures, 2012, 35: 29-36.
[20] Unal M, Burak B. Development and analytical verification of an inelastic reinforced concrete joint model[J]. Engineering Structures, 2013, 52: 284-294.
[21] 邢国华, 刘伯权, 吴涛. 基于软化拉-压杆模型的钢筋混凝土框架节点受剪分析[J]. 建筑结构学报, 2011, 32(5): 125-134.
Xing Guohua, Liu Boquan, Wu Tao. Shear strength of reinforced concrete frame joints using softened strut and tie model[J]. Journal of Building Structures, 2011, 32(5): 125-134. (in Chinese)
[22] 王田友, 苏小卒, 方江生. 拉压杆模型方法在钢筋混凝土框架节点计算中的应用研究[J]. 土木工程学报, 2007, 40(11): 36-40.
Wang Tianyou, Su Xiaozu, Fang Jiangsheng. Application of STMs for calculation of reinforced concrete frame joints[J]. China Civil Engineering Journal, 2007, 40(11): 36-40. (in Chinese)
[23] Hwang S J, Lee H J. Analytical model for predicting shear strengths of exterior reinforced concrete beam-column joints for seismic resistance[J]. ACI Structural Journal, 1999, 96(5): 846-857.
[24] Hwang S J, Lee H J. Analytical model for predicting shear strengths of interior reinforced concrete beam-column joints for seismic resistance[J]. ACI Structural Journal, 2000, 97(1): 35-44.
[25] Fan G X, Song Y P, Wang L C. Experimental study on the seismic behavior of reinforced concrete beam-column joints under various strain rates[J]. Journal of Reinforced Plastics & Composites, 2014, 33(7): 601-618.
[26] 范国玺, 王德斌, 杨树桐, 等. 不同加载速率下梁柱边节点的抗震性能[J]. 哈尔滨工程大学学报, 2015, 36(10): 1326-1330, 1334.
Fan Guoxi, Wang Debin, Yang Shutong, et al. Seismic behavior of exterior beam-column joints under different loading speeds[J]. Journal of Harbin Engineering University, 2015, 36(10): 1326-1330, 1334. (in Chinese)
[27] ACI 318-02. Building code requirements for structural concrete[S]. Farmington Hills: American Concrete Institute, 2002.
[28] GB50010-2010. 混凝土结构设计规范[S]. 北京: 中国建筑工业出版社, 2010.
GB50010-2010. Code for design of concrete structures[S]. Beijing: China Architecture and Building Press, 2010. (in Chinese)
[29] 范国玺, 宋玉普, 王立成, 等. 应变率对钢筋混凝土梁柱中节点动态性能影响的试验研究[J]. 土木工程学报, 2014, 47(11): 11-18.
Fan Guoxi, Song Yupu, Wang Licheng, et al. Experimental study of the influence of strain rate on the dynamic performance of interior reinforced concrete beam-column joints[J]. China Civil Engineering Journal, 2014, 47(11): 11-18. (in Chinese)
[30] Comtié Euro-International du Béton. CEB-FIP model code 1990[S]. London, UK: Thomas Telford Ltd, 1993.
[31] GB50011-2010. 建筑抗震设计规范[S]. 北京: 中国建筑工业出版社, 2010.
GB50011-2010. Code for seismic design of buildings[S]. Beijing: China Architecture and Building Press, 2010. (in Chinese)
[32]曹忠民,李爱群,王亚勇,等.高强钢绞线网-聚合物砂浆抗震加固框架梁柱节点的试验研究[J].建筑结构学报,2006, 27(4): 10-15.
Cao Zhongmin, Li Aiqun, Wang Yayong, et al. Experimental study on beam-column connections strengthened with high-strength steel wire mesh and polymer mortar[J]. Journal of Building Structures, 2006, 27(4): 10-15. (in Chinese)
