一般大气环境下既有预应力混凝土结构的耐久性研究  

Durability analysis of service pre-stressed concrete structure under general atmospheric environment

作　　者：赵卓[1] 曾力[1] 贺强 

机构地区：[1]郑州大学土木工程学院,河南郑州450002 [2]河南天地置业有限公司,河南郑州450008

出　　处：《混凝土》2009年第8期22-24,共3页Concrete

基　　金：河南省交通厅公路局项目(200703)

摘　　要：在一般大气环境中,混凝土的碳化是造成既有预应力混凝土结构耐久性降低的主要成因。基于既有预应力混凝土结构的腐蚀损伤特点,结合工程实例,考虑了一般大气环境下各耐久性影响因素如混凝土保护层厚度、混凝土碳化系数以及局部环境影响等的不确定性,通过MonteCarlo随机模拟,提出了基于初锈准则的耐久性概率评估方法,为一般大气环境下既有预应力混凝土结构的耐久性评估、再设计及维修加固提供了参考和量化依据。Under general atmospheric environment,the carbonation of concrete is the main cause of the decline of the durability ofpre-strcssed concrete structures.Based on the corrosion damage characteristics of prc-stressed concrete structures, with practical engineering examples, the uncertainty of structural durability influence factors such as concrete cover depth, concrete carbonation coefficient and local environmental influence arc considered,through Monte Carlo simulation,the stochastic durability evaluation method based on corrosion failure criteria of service pre-strcssed concrete structures is suggested,which will provide reference and quantified basis for service concrete structure under general atmospheric environment on durability evaluation, durability re-design and maintenance.

关 键 词：结构耐久性 剩余寿命 概率统计分析 既有预应力混凝土结构 一般大气环境 

分 类 号：TU528.01[建筑科学—建筑技术科学]