Journal:四川大学学报(工程科学版）

Key Words:Qingdao Bay Bridge concrete freezing and thawing test research damage constitutive equation numerical analysis

Abstract:The freezing and thawing effects of seawater in the northern sea area have an important impact on the safety and stability of the concrete cross-sea bridge. In response to this problem, the ultimate compressive strength and the ultimate compressive strength of the concrete of the Qingdao Bay Bridge under freezing and thawing cycles were obtained through indoor freeze-thaw tests. Its peak strain, ultimate tensile strength, elastic modulus and other mechanical performance indexes decline with different freeze-thaw cycles, and the concrete freeze-thaw damage constitutive equation is derived. According to the comparison between the indoor and outdoor tests, the degradation law of each mechanical performance index of the pier concrete structure with the service time of the structure and the freeze-thaw damage constitutive equation of the concrete in different service periods are obtained. A 3-D finite element model of the transition pier foundation of the channel bridge of the Cangkou section of the Qingdao Bay Bridge was established. The nonlinear theory was used to numerically analyze the transition pier foundation. The maximum stress and maximum stress of the concrete transition pier foundation during different service periods were obtained. The generation position of vertical displacement and its change trend with time, and analysis of its safety laws, and reached several conclusions, which can provide a certain reference for the early design and maintenance of the project.

All the Authors:纪圣振,zhangfeng

First Author:Jia Chao

Indexed by:Journal paper

Discipline:Engineering

First-Level Discipline:Civil Engineering

Document Type:J

Volume:42

Issue:3

Page Number:7~13

Translation or Not:no

Date of Publication:2010-03-01

Included Journals:EI