- 摘 要
-
(石家庄经济学院勘查技术与工程学院, 石家庄 050031)
[摘要]为了研究高轴压比下钢筋混凝土柱的变形,对4个钢筋混凝土柱分别进行低周反复和单调加载试验。通过对塑性铰区域局部变形的测量,研究了塑性铰区域的弯曲变形、剪切变形和粘结滑移变形所产生的侧移在柱中总侧移中所占的比例,结果表明:即使对于剪跨比较大的试件,其剪切变形和粘结滑移变形仍不能简单地被忽略。根据试验结果,提出了等效屈服曲率和极限曲率的计算方法,推导出了考虑弯曲变形、剪切变形和粘结滑移变形影响的极限位移计算公式,计算结果与试验结果符合较好。
[关键词]钢筋混凝土柱; 极限位移; 拟静力试验
中图分类号:TU375.3 文献标识码:A 文章编号:1002-848X(2014)15-0066-05
Calculation method and experimental study on the ultimate displacement of reinforced concrete columns
Xie Yongping, Jia Lei
(College of Exploration Technology and Engineering, Shijiazhuang University of Economics, Shijiazhuang 050031, China)
Abstract: In order to study the deformation of reinforced concrete columns under high axial compression ratio, low cyclic loading test and monotonic loading test were conducted on four reinforced concrete columns. Through the measurement of plastic hinge local deformation, the lateral displacement caused by bending deformation, shear deformation and bond-slip deformation in plastic hinge region was studied as well as the proportion in the total lateral of the column. Results show that the shear deformation and bond-slip deformation still can not be simply ignored even for the specimens with large shear-span ratio. According to the test results, calculation methods of the equivalent yield curvature and ultimate curvature were proposed. A calculation formula of ultimate displacement considering the bending deformation, shear deformation and bond-slip deformation was derived, and the calculation results coincide well with the test results.
Keywords: reinforced concrete column; ultimate displacement; pseudo-static test
作者简介:解咏平,博士,讲师,Email:axypa@163.com。
参考文献
[1]PRIESTLEY M J N, PARK R. Strength and ductility of concrete bridge columns under seismic loading[J]. ACI Structural Journal, 1987, 84(1):61-76.
[2]朱幼麟.钢筋混凝土柱轴压比限值的研究[J].建筑结构,2000,30(10):23-27.
[3]解咏平,贾磊. 高轴压比钢筋混凝土柱受力性能的试验研究[J].建筑结构,2014,44(15):61-65,82.
[4]ELWOOD K J, EBERHARD M O. Effective stiffness of reinforced concrete columns[J]. ACI Structural Journal,2009, 106(4):476-484.
[5]PARK R, PAULAY T. Reinforced concrete structures[M]. New York: John Wiley & Sons,1974.
[6]SEZEN H, CHOWDHURY T. Hysteretic model for reinforced concrete columns including the effect of shear and axial load failure[J]. Journal of Structural Engineering, 2009, 135(2):139-146.
[7]李贵乾.钢筋混凝土桥墩抗震性能试验研究及数值分析[D].重庆:重庆交通大学,2010.
[8]Pacific Earthquake Engineering Research Center. PEER structural performance database[DB/OL]. Berkeley:Pacific Earthquake Engineering Research Center, 2003.http://nisee. Berkeley. edu/spd/
[9]沈聚敏,翁义军,冯世平.周期反复荷载下钢筋混凝土压弯构件的性能[J].土木工程学报,1982,15(2):53-64.
[10]袁必果.钢筋混凝土压弯构件塑性铰的试验研究[J].南京工学院学报:自然科学版,1981(3): 117-129.
[11]成文山,邹银生,程翔云.钢筋混凝土压弯构件恢复力特性的研究[J].湖南大学学报:自然科学版,1983,10(4):13-22.
[12]王福明,曾建民,锻炼.钢筋混凝土压弯构件塑性铰的试验研究[J].太原工业大学学报:自然科学版,1989,20(4):21-30.
[13]袁万城, SIMSCH G , KoNIG G.反复荷载作用下高强约束混凝土柱的弯曲延性[J].土木工程学报,1995,28(5):55-61.
[14]MANDER J B, PRIESTLEY M J N, PARK R. Theoretical stress-strain modal for confined concrete[J]. Journal of Structural Engineering,1988, 114(8):1804-1826.
[15]HACHEM M. Seismic performance of circular reinforced concrete bridge columns under bidirectional earthquake loading[D]. Berkeley: University of California, 2002.
[16]周定松,吕西林,蒋欢军.钢筋混凝土框架梁的变形能力及基于性能的抗震设计方法[J].地震工程与工程振动, 2005,25(4):60-66.
[17]姜锐,苏小卒.塑性铰长度经验公式的比较研究[J]. 工业建筑,2008,38(增刊):425-430.