吉林大学学报(工学版) ›› 2020, Vol. 50 ›› Issue (5): 1718-1727.doi: 10.13229/j.cnki.jdxbgxb20190581

• 交通运输工程·土木工程 • 上一篇    

连续梁桥地震行为可控设计准则及实用装置

高昊1(),王君杰1(),刘慧杰2,王剑明3   

  1. 1.同济大学 土木工程学院,上海 200092
    2.中国建筑国际集团,广东 深圳 518057
    3.成都济通路桥科技有限公司,成都 611430
  • 收稿日期:2019-06-11 出版日期:2020-09-01 发布日期:2020-09-16
  • 通讯作者: 王君杰 E-mail:gaohao@tongji.edu.cn;jjwang@tongji.edu.cn
  • 作者简介:高昊(1992-),男,博士研究生.研究方向:桥梁抗震.E-mail:gaohao@tongji.edu.cn
  • 基金资助:
    国家重点研发计划项目(2018YFC1504306);国家自然科学基金重点项目(51438010);国家自然科学基金面上项目(51778498);上海市“科技创新行动计划”基础研究领域重点项目(17DZ1204300)

Design criterion and applied devices for controlled seismic behavior of continuous girder bridges

Hao GAO1(),Jun-jie WANG1(),Hui-jie LIU2,Jian-ming WANG3   

  1. 1.College of Civil Engineering, Tongji University, Shanghai 200092, China
    2.China State Construction International Holdings Limited, Shenzhen 518057, China
    3.Chengdu Jitong Road & Bridge Co, Ltd. , Chengdu 611430,China
  • Received:2019-06-11 Online:2020-09-01 Published:2020-09-16
  • Contact: Jun-jie WANG E-mail:gaohao@tongji.edu.cn;jjwang@tongji.edu.cn

摘要:

为实现连续梁桥地震行为可控,其抗震安全得到有效保证,本文基于连续梁桥地震行为可控的设计准则,研发了相关实用装置。设计了一种新型隔震支座,允许其在地震中发生破坏,以释放上部结构的惯性力,保护墩柱、桩基不发生损伤。设计了两种与该隔震支座配合使用的大行程钢阻尼耗能限位装置,以控制上部结构的位移在可接受的范围内。采用室内试验方法对隔震支座与耗能限位装置力学行为进行试验和检验,并得到相关本构模型参数。试验结果表明:该支座剪断可控性强,断后摩擦行为稳定,摩擦过程不确定性小,配合使用的大行程钢阻尼装置滞回曲线饱满,耗能特性突出。最后,结合连续梁桥工程案例,采用数值模拟方法对实用装置的有效性进行了验证。

关键词: 桥梁工程, 设定能力, 剪断试验, 足尺拟静力试验, 大行程

Abstract:

In order to realize the controllable seismic behavior of continuous girders bridge and ensure its seismic safety effectively, the applied devices were developed based on the corresponding design criteria. A new type of isolation bearing was designed, which can be destroyed during earthquake to release the inertial force from the superstructure so that the pier and pile foundations are not damaged by the earthquake. A combination of two kinds of large-stroke energy dissipation devices was utilized to ensure that the displacement of the superstructure is within the acceptable range. A series of mechanical performance tests of the isolation bearing and energy dissipation limiting device were conducted, and the constitutive model parameters were determined. The test results show that the shear process is highly controllable, and the friction behavior after fracture is highly stable with small uncertainty. The hysteretic curves of the two energy consumption limiting devices are full. By means of simulation calculation, a continuous girder bridge was used as an example to verify the effectiveness of the applied devices proposed in this paper.

Key words: bridge engineering, limited capacity, shear fracture test, full-scale quasi-static test, large-stroke

中图分类号: 

  • U447

图1

隔震支座构造"

图2

柱形钢阻尼装置构造"

图3

E形钢阻尼装置构造"

图4

设定能力支座与不同钢阻尼装置的组合形式"

图5

销钉试件构造"

图6

销钉破坏断面"

表1

销钉试验结果"

内容编号承载力/kN
慢速剪切20-A-143.21
20-A-242.66
20-A-343.95
均值43.27
25-A-167.35
25-A-273.00
25-A-371.99
均值70.78
快速剪切20-B-148.65
20-B-244.10
20-B-341.75
均值44.83
25-B-176.26
25-B-272.48
25-B-374.74
均值74.49

图7

销钉试验曲线"

图8

隔震支座试验照片"

图9

起始剪断试验结果"

图10

后续水平往复加载试验结果"

表2

隔震支座力学参数"

设计指标数值
等效屈服位移/mm0.8
等效屈服力/kN13.1
等效摩擦因数0.004
屈服后刚度与弹性刚度之比0.003

图11

基于模块化思想设计的柱形和E形钢阻尼装置"

图12

耗能元件尺寸"

图13

部分试验照片"

图14

试验结果曲线"

表3

三种位移条件下屈服力平均值偏差情况"

项目屈服力/kN屈服位移/mm
平均误差/%-9.510
设计值25030
实测值(±0.25 Sd18427
实测值(±0.50 Sd22735
实测值(±1.00 Sd26837
等效值(三者平均)22633

图15

桥梁有限元模型"

图16

桥梁结构地震响应"

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