连续梁桥地震行为可控设计准则及实用装置

doi:10.13229/j.cnki.jdxbgxb20190581

Abstract

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

CLC Number:

U447

Hao GAO,Jun-jie WANG,Hui-jie LIU,Jian-ming WANG. Design criterion and applied devices for controlled seismic behavior of continuous girder bridges[J].Journal of Jilin University(Engineering and Technology Edition), 2020, 50(5): 1718-1727.

Figures/Tables 19

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内容	编号	承载力/kN
慢速剪切	20-A-1	43.21
	20-A-2	42.66
	20-A-3	43.95
	均值	43.27
	25-A-1	67.35
	25-A-2	73.00
	25-A-3	71.99
	均值	70.78
快速剪切	20-B-1	48.65
	20-B-2	44.10
	20-B-3	41.75
	均值	44.83
	25-B-1	76.26
	25-B-2	72.48
	25-B-3	74.74
	均值	74.49

设计指标	数值
等效屈服位移/mm	0.8
等效屈服力/kN	13.1
等效摩擦因数	0.004
屈服后刚度与弹性刚度之比	0.003

项目	屈服力/kN	屈服位移/mm
平均误差/%	-9.5	10
设计值	250	30
实测值（±0.25 S_d）	184	27
实测值（±0.50 S_d）	227	35
实测值（±1.00 S_d）	268	37
等效值（三者平均）	226	33

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

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