|Table of Contents|

Reasonable seismic restraint system of long-span steel truss girder suspension bridge(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2022年6期
Page:
90-100
Research Field:
桥梁工程·交通基础设施智能化运维技术专栏
Publishing date:

Info

Title:
Reasonable seismic restraint system of long-span steel truss girder suspension bridge
Author(s):
ZHOU Mi;  XU Zi-tao
(1. School of Highway, Chang’an University, Xi’an 710064, Shaanxi, China; 2. Key Laboratory for Old Bridge Detection and Reinforcement Technology of the Ministry of Transportation, Chang’an University, Xi’an 710064, Shaanxi, China)
Keywords:
bridge engineering;  constraint system;  nonlinear time history analysis;  suspension bridge;  aseismic design
PACS:
U442.55
DOI:
10.19721/j.cnki.1671-8879.2022.06.009
Abstract:
In order to reduce the seismic response of the main components of the long-span suspension bridge under the action of earthquake and reduce the seismic damage risk of the structure, the reasonable seismic structure system of the long-span suspension bridge was determined in the conceptual design stage, according to the characteristics of suspension bridges, 3 different forms of central buckles and 4 different restraint systems at the beam ends were proposed. For a single-span suspension bridge with a main span of 640 m, the finite element analysis software was used to obtain the displacement responses of the end of the stiffening beam, the mid-span and the top of the tower, and the internal force responses of the tower bottom and key components under different restraint systems. On this basis, the effects of different restraint systems on the seismic performance of suspension bridges were evaluated. The results show that setting the central buckle can affect the longitudinal drift characteristics of the stiffening beam, and reduce the longitudinal seismic displacement of the stiffening beam. The seismic axial force of the flexible central buckle exceeds the limit, which makes the central buckle invalid, and the rigid central buckle will cause the local stress of the stiffening beam to be too large. Compared with the case without the central buckle, the installation of the buckling restrained brace in the midspan of the long-span suspension bridge reduces the maximum longitudinal seismic displacement of the beam end by 35.29%, and the longitudinal bending moment and shear force at the bottom of the bridge tower by 9.47% and 2.88%, respectively. The combined arrangement of the buckling restrained brace and the longitudinal viscous damper at the beam end reduces the maximum longitudinal seismic displacement at the beam end by 68.68%, and the longitudinal bending moment and shear force at the bottom of the bridge tower by 36.5% and 23.6%, respectively. The transverse buckling restrained braces are arranged between the end of the stiffening beam and the bridge tower, which reduces the maximum transverse seismic displacement at the end of the beam and the mid-span by 73.9% and 48.16% respectively compared with the case where elastic cables are installed, the transverse bending moment at the bottom of the bridge tower is reduced by 17.55% compared with the case with elastic cables, and the transverse shear force is reduced by 27.31% compared with the case with dampers. The research results can provide reference for the seismic design of bridges of the same type.5 tabs, 18 figs, 22 refs.

References:

[1] 周 敉,朱国强,吴 江,等.地震下大跨径连续刚构桥合理约束体系研究[J].振动与冲击,2019,38(10):98-104.
ZHOU Mi,ZHU Guo-qiang,WU Jiang,et al.Constraint system for a long-span continuous rigid frame bridge under earthquake[J].Journal of Vibration and Shock,2019,38(10):98-104.
[2]周 敉,刘 阳,赵 威.地震作用下采用UHPC铺装钢箱梁斜拉桥阻尼器参数优化[J].长安大学学报(自然科学版),2021,41(2):89-101.
ZHOU Mi,LIU Yang,ZHAO Wei.Damper parameter optimization of steel box girder cable-stayed bridge with UHPC pavement under earthquake[J].Journal of Chang’an University(Natural Science Edition),2021,41(2):89-101.
[3]单宏伟,韩大章,吕立人.润扬长江公路大桥悬索桥中央扣设计[J].公路,2004,49(8):58-61.
SHAN Hong-wei,HAN Da-zhang,LU Li-ren.Design of center nodes of Runyang Suspension Bridge over Yangtze River[J].Highway,2004,49(8):58-61.
[4]赵恺雍,王 浩,郜 辉.世界首座高铁悬索桥抗震性能研究[J].哈尔滨工程大学学报,2021,42(9):1262-1270.
ZHAO Kai-yong,WANG Hao,GAO Hui.Antiseismic performance of the world’s first high-speed railway suspension bridge[J].Journal of Harbin Engineering University,2021,42(9):1262-1270.
[5]陶齐宇,曹发辉,蒋劲松,等.泸定大渡河兴康特大桥抗震设计关键技术[J].桥梁建设,2018,48(4):90-95.
TAO Qi-yu,CAO Fa-hui,JIANG Jin-song,et al.Key techniques of seismic design of Xingkang Dadu River Bridge in Luding[J].Bridge Construction,2018,48(4):90-95.
[6]徐 勋,强士中.中央扣对大跨悬索桥动力特性和地震响应的影响研究[J].铁道学报,2010,32(4):84-91.
XU Xun,QIANG Shi-zhong.Influence of central buckle on dynamic behavior and seismic response of long-span suspension bridge[J].Journal of the China Railway Society,2010,32(4):84-91.
[7]汪鸿鑫,叶爱君.柔性中央扣对大跨度悬索桥地震反应的影响[J].土木工程与管理学报,2019,36(6):161-165.
WANG Hong-xin,YE Ai-jun.Influence of flexible central buckle on seismic response of long-span suspension bridges[J].Journal of Civil Engineering and Management,2019,36(6):161-165.
[8]李永斌,曹 冬.具有刚性中央扣的大跨度悬索桥随机地震响应研究[J].世界桥梁,2017,45(3):48-54.
LI Yong-bin,CAO Dong.Study of stochastic seismic response of long-span suspension bridge with rigid central buckle[J].World Bridges,2017,45(3):48-54.
[9]刘 伟,宋松科,权新蕊,等.悬索桥BRB中央扣的减震性能研究[J].桥梁建设,2022,52(3):61-68.
LIU Wei,SONG Song-ke,QUAN Xin-rui,et al.Study of seismic mitigation performance of BRB central buckle of suspension bridge[J].Bridge Construction,2022,52(3):61-68.
[10]郭志明,汪鸿鑫,叶爱君.设柔性中央扣的特大跨度悬索桥纵向抗震体系研究[J].桥梁建设,2020,50(1):38-43.
GUO Zhi-ming,WANG Hong-xin,YE Ai-jun.Longitudinal anti-seismic system for long-span suspension bridge with flexible central buckle[J].Bridge Construction,2020,50(1):38-43.
[11]江 辉,宋光松,郭 辉,等.跨“V”形峡谷大跨度铁路悬索桥减震研究[J].中国铁道科学,2022,43(1):63-74.
JIANG Hui,SONG Guang-song,GUO Hui,et al.Research on seismic reduction of long-span railway suspension bridge located over V-shaped canyon[J].China Railway Science,2022,43(1):63-74.
[12]卢长炯,卢明奇.基于黏滞阻尼器的单跨悬索桥地震位移响应控制[J].贵州大学学报(自然科学版),2021,38(2):98-103.
LU Chang-jiong,LU Ming-qi.Seismic displacement responses control of single span suspension bridges based on viscous dampers[J].Journal of Guizhou University(Natural Sciences),2021,38(2):98-103.
[13]苗润池.宜昌伍家岗长江大桥抗震设计关键技术研究[J].桥梁建设,2020,50(增2):36-40.
MIAO Run-chi.Study of key seismic design techniques for Wujiagang Changjiang River Bridge in Yichang[J].Bridge Construction,2020,50(S2):36-40.
[14]YANG M G,CHEN Z Q,HUA X G.An experimental study on using MR damper to mitigate longitudinal seismic response of a suspension bridge[J].Soil Dynamics and Earthquake Engineering,2011,31(8):1171-1181.
[15]POURZEYNALI S,BAHAR A,POURZEYNALI S.Vertical vibration control of suspension bridges subjected to earthquake by semi-active MR dampers[J].Scientia Iranica,2017,24(2):439-451.
[16]WANG H,LI A Q,JIAO C K,et al.Damper placement for seismic control of super-long-span suspension bridges based on the first-order optimization method[J].Science China Technological Sciences,2010,53(7):2008-2014.
[17]SHEN Y,LI J Z,FREDDI F,et al.Numerical investigation of transverse steel damper(TSD)seismic system for suspension bridges considering pounding between girder and towers[J].Soil Dynamics and Earthquake Engineering,2022,155:107203.
[18]王 浩,李爱群,郭 彤.超大跨悬索桥地震响应的综合最优控制研究[J].湖南大学学报(自然科学版),2006,33(3):6-10.
WANG Hao,LI Ai-qun,GUO Tong.Compositive optimal control of the seismic response for super-long-span suspension bridges[J].Journal of Hunan University(Natural Sciences),2006,33(3):6-10.
[19]于德恩,李建中.中央扣对大跨悬索桥地震响应的影响研究[J].结构工程师,2016,32(1):112-118.
YU De-en,LI Jian-zhong.Influence of central buckle on seismic response of long-span suspension bridges[J].Structural Engineers,2016,32(1):112-118.
[20]宋光松,江 辉,郭 辉,等.行波激励下高烈度区特大铁路悬索桥减震技术研究[J/OL].铁道科学与工程学报,2022:1-12[2022-08-15]DOI:10.19713/j.cnki.43-1423/u.T20211465.
SONG Guang-song,JIANG Hui,GUO Hui,et al.Research on shock absorption technology of extra-large railway suspension bridges in high-intensity areas under traveling wave excitation[J/OL].Journal of Railway Science and Engineering,2022:1-12[2022-08-15]DOI:10.19713/j.cnki.43-1423/u.T20211465.
[21]胡文军,万田保.山区大跨度铁路悬索桥设计关键技术[J].铁道建筑,2022,62(5):13-17.
HU Wen-jun,WAN Tian-bao.Key design techniques for long span railway suspension bridge in mountainous area[J].Railway Engineering,2022,62(5):13-17.
[22]LU L.Application of buckling-restrained braces in the seismic control of suspension bridges[J].Earthquake Engineering and Engineering Vibration,2022,21(2):543-557.

Memo

Memo:
-
Last Update: 2022-12-20