基于连续强度法的不锈钢筋混凝土受弯构件承载力分析  

Bearing Capacity Analysis of Stainless Steel Reinforced Concrete Flexural Members Based on Continuous Strength Method

作　　者：李清富[1] 郭威[1,2] 匡一航 LI Qingfu;GUO Wei;KUANG Yihang(School of Water Conservancy Science and Engineering,Zhengzhou University,Zhengzhou 450001,China;State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]郑州大学水利科学与工程学院,河南郑州450001 [2]大连理工大学海岸与近海工程国家重点实验室,辽宁大连116024

出　　处：《应用基础与工程科学学报》2022年第3期554-565,共12页Journal of Basic Science and Engineering

基　　金：国家自然科学基金项目(51679220);水利部堤防安全与病害防治工程技术研究中心开放课题基金项目(2018002)。

摘　　要：为提高不锈钢筋混凝土受弯构件承载力的计算精度,基于连续强度法,在计算中引入反映应变硬化特性的不锈钢本构模型,提出了不锈钢筋混凝土受弯构件正截面承载力的迭代计算方法.鉴于迭代算法进行构件设计的复杂性,本文采用不锈钢筋双线性硬化本构模型,对迭代法进行了简化,并以构件失效时混凝土达到极限压应变为前提,推导了不锈钢筋混凝土单筋和双筋矩形截面正截面承载力计算公式.基于15组试验数据,将试验结果与规范、迭代法和简化法的计算结果进行了对比分析,结果表明:迭代法和简化法提供了比规范更精确的计算结果.同时,为了验证迭代法和简化法的相关性,在15组试验数据基础上又增加了35组算例,使用两种方法进行计算,两者计算结果的相关系数为0.994,表明两种方法的计算结果吻合良好.To improve the calculation accuracy of the bearing capacity of stainless steel reinforced concrete flexural members, based on the continuous strength method, a stainless steel constitutive model that allowed for strain hardening was added into calculation.An iterative calculation method of normal section bearing capacity under different bearing capacity limit states was proposed based on the plane section assumption.Considering the complexity of iterative algorithm for component design, the stainless steel reinforcements adopt a bilinear constitutive model that allowed for strain hardening.It was assumed that the stainless steel reinforced concrete flexural members were usually damaged due to the crushing of concrete.The test results are compared with the calculation results of the standard, iterative and simplified methods based on 15 sets of experimental data.The results show that the iterative and simplified methods provide more accurate results than the specifications.To verify the correlation between the iterative method and the simplified method, an additional 35 groups of examples were added to the 15 sets of experimental data, and the two methods were used for calculation.The correlation coefficient between the two calculation results is 0.994,which shows that the calculation results of the two methods agree well.

关 键 词：不锈钢筋 混凝土结构 受弯构件 连续强度法 正截面承载力 

分 类 号：TU375[建筑科学—结构工程]