据模型相似原理及多点激励理论，对缩尺比1:20的钢筋混凝土高墩曲线桥梁进行地震模拟振动台试验。研究高墩曲线桥梁结构在不同频谱地震波、不同峰值加速度及局部场地效应作用下高柔桥墩损伤模式及结构动力响应规律。结果表明，高柔桥墩损伤有明显的分布柔性特点，墩高差对桥墩裂缝开展及桥梁动力响应影响显著；不同频谱地震波作用下曲线桥梁结构动力响应规律各异；曲线桥梁结构动力响应峰值与地震波加速度峰值基本呈线性增长；局部地形效应使结构动力响应增大，导致曲线桥梁结构动力响应呈非线性增长；高墩曲线桥梁地震响应有明显空间性，首尾桥墩顶径向动力响应较大，易发生横桥向落梁破坏。
Abstract
Based on the model similarity principle and multi-point support excitation theory, a scale 1:20 curved bridge of reinforced concrete high pier seismic simulation shaking tables test were done in this paper. The high flexible pier damage model and the regular of structure dynamic response under different seismic wave spectrum and the peak acceleration and local site effect were researched. The results showed that high flexible pier damage has obvious distributional flexible characteristics, pier elevation significantly affected on pier cracks to carry out and bridges dynamic response; the curved bridge structure dynamic response has differently regular pattern under different spectrum seismic waves; curved bridge structure dynamic response peak and seismic waves acceleration peak basic linearly increases; local site effect makes structural dynamic response increase, leading to curved bridge structure dynamic response be nonlinear growth; high pier curved bridge seismic response has obvious spatiality, inclusive pier top radial dynamic response larger, transverse prone to falling beam damage.
关键词
高墩 /
曲线桥梁 /
局部场地效应 /
多点激励 /
振动台试验 /
地震响应
{{custom_keyword}} /
Key words
high pier /
curved bridge /
local site effect /
multi-support excitation /
shaking tables test /
seismic response
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] 范立础. 桥梁抗震[M]. 上海：同济大学出版社，1997.
[2] Williams D, Godden W. Seismic response of long curved bridge experimental model studies[J]. Earthquake Engineer- ing and Structural Dynamics, 1979, 7 (2): 107-128.
[3] 范立础,李建中. 汶川桥梁震害分析与抗震设计对策[J]. 公路,2009(5)：122-128.
FAN Li-chu, LI Jian-zhong. Bridge damage in wenchuan earthquake analysis and design strategies[J]. Highway, 2009(5): 122-128.
[4] Tseng W S, Penzien J. Seismic analysis of long multiple-span highway bridges [J]. Earthquake Engineering and Structural Dynamics, 1975, 4: 3-24.
[5] 全伟,李宏男. 曲线桥多维地震时程分析主方向研究[J]. 振动与冲击,2008, 27(8)：20-24.
QUAN Wei, LI Hong-nan. Research on critical angle of curved bridge in multi-dimensional earthquake time history analysis[J]. Journal of Vibration and Shock, 2008, 27(8): 20- 24.
[6] 刘保纲,郭咏辉. 曲线箱梁桥的地震反应分析[J]. 土木工程学报,2003,23(10)：56-59.
LIU Bao-gang, GUO Yong-hui. Seismic analysis of curved box-girder bridge [J]. China Civil Engineering Journal, 2003, 23(10): 56-59.
[7] 叶爱君,袁万城,胡世德. 高墩振动台试验研究[J]. 同济大学学报,1996,24(6)：606-612.
YE Ai-jun, YUAN Wan-cheng, HU Shi-de. Shaking table test of a tall pier model [J]. Journal of Tongji University, 1996, 24(6):606-612.
[8] 王蕾,赵成刚,王智峰. 考虑地形影响和多点激励的大跨高墩桥地震响应分析[J]. 土木工程学报,2006,39(1)：50-53.
WANG Lei, ZHAO Cheng-gang, WANG Zhi-feng. Seismic responses analysis of continuous rigid-framed bridge with high piers considering topographic effects and multi-support excitations[J]. China Civil Engineering Journal,2006, 39(1): 50-53.
[9] 王蕾. 大跨度刚构桥地震响应分析及振动台试验研究[D]. 北京：北京交通大学，2010.
[10] 闫晓宇,李忠献,韩强,等. 多点激励下大跨度连续刚构桥地震响应振动台阵试验研究[J]. 土木工程学报，2013，46(7)：81-89.
YAN Xiao-yu, LI Zhong-xian, HAN Qiang, et al. Shaking tables test study on seismic responses of a long-span rigid- framed bridge under multi-support excitations[J]. China Civil Engineering Journal, 2013, 46(7): 81-89.
[11] 周颖,吕西林. 建筑结构振动台模型试验方法与技术[M]. 北京：科学出版社，2012.
[12] 张敏政. 地震模拟实验中相似律应用的若干问题[J]. 地震工程与工程振动,1997,17(2): 52-58.
ZHANG Min-zheng. Study on similitude laws for shaking table tests [J]. Earthquake Engineering and Engineering Vibration, 1997, 17(2): 52-58.
[13] Nuti C, Vanzi I. Influence of earthquake spatial variability on differential soil displacements and SDF system response [J]. Earthquake Engineering & Structural Dynamics, 2005, 34(11):1353-1374.
[14] Lou L, Zerva A. Effects of spatially variable ground motions on the seismic response of a skewed multi-span RC highway bridge[J]. Soil Dynamics and Earthquake Engineering, 2005, 25 (7):729-740.
[15] 李忠献,史志利. 行波激励下大跨度连续刚构桥的地震反应分析[J]. 地震工程与工程振动,2003,23(2)：68-76.
LI Zhong-xian, SHI Zhi-li. Seismic response analysis for long-span continuous rigid-framed bridges under excitation of traveling waves[J]. Earthquake engineering and Engineering Vibration, 2003, 23(2):68-76.
[16] 潘旦光,楼梦麟,范立础. 多点输入下大跨度结构地震反应分析研究现状[J]. 同济大学学报,2001,29(10)：1213 -1218.
PAN Dan-guang, LOU Meng-lin, FAN Li-chu. Status of seismic response analysis of long-span structures under multiple support excitations [J]. Journal of Tongji University, 2001, 29(10):1213-1218.
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}
PDF(2677 KB)
