Fatigue characteristics of prestressed hollow slab under chloride ion corrosion
DU Chaowei
ZHANG Changlin
ZHENG Yuanxun
LI Qingfu
MEN Bo
Abstract：In order to study the fatigue properties of prestressed hollow slab beams under the action of chloride ion,the prestressed concrete hollow slab beam model (ratio of similitude is 0.1) was designed.Chloride ion erosion durability test (two kinds of erosion degree:light and heavy) was done firstly.Then,static load failure test and structural fatigue test were performed to analyse the effect of chloride ion corrosion on the dynamic and static parameters as well as fatigue life.And the influence of fatigue loading on dynamic and static strain,deflection and fundamental frequency of the test members.Based on the test results,the relations between degree of chloride ion erosion and the structural fatigue properties were established.The results show that as the corrosion degree of chloride ion increased,the fatigue life of the test plate decreased gradually.For example,for severe erosion test plate,the fatigue life was reduced to 30,000 times.Dynamic and static force parameters of structure were influenced by fatigue loading times.For example after 300000 times fatigue load and under 15 t static loads,compared to 100000 times fatigue load,the rate of deflection increase of health plate and mild erosion plate were 83.7％ and 115％ respectively.
Keywords：bridge engineeringstructure fatigue propertiesstructure durabilitycarbonation corrosionprestressed hollow slab
Publication Date：2018-05-02
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 136-143 )