基于OpenSees的预应力CFRP加固混凝土梁的数值分析  

Numerical Analysis for Prestressed CFRP Reinforced Concrete Beams Based on OpenSees

作　　者：程先春[1] 蔡小宁[2] 王金兰[2] 闫肖武[2] 

机构地区：[1]江苏省邮电规划设计院有限责任公司,江苏南京210006 [2]淮海工学院土木工程学院,江苏连云港222005

出　　处：《江苏建筑》2016年第6期24-26,30,共4页Jiangsu Construction

基　　金：江苏省自然科学基金(BK20130408);江苏省高校自然科学研究项目(15KJB560001)

摘　　要：采用OpenSees有限元软件,对预应力CFRP加固混凝土梁进行数值模拟,并与试验结果对比,验证有限元模拟的准确性和可靠性。对影响预应力CFRP加固混凝土梁的受力性能的主要因素进行参数化分析,包括预应力大小、预应力筋面积等,研究主要影响因素对加固梁的开裂荷载、承载力、极限曲率及破坏形态的影响。并给出设计建议。研究结果表明:通过对加固用CFRP选择合适的预应力数值及预应力筋的面积,使被加固构件的破坏形态控制在界限破坏附近,可达到强度和变形均优的、理想的加固设计目标。The tests of the prestressed CFRP reinforced concrete beams were simulated by the finite element software OpenSees and the accuracy and reliability of the simulation was validated compared with the test results. The main factors affecting the mechanical behavior of CFRP reinforced concrete beams were parametric analysis, including the prestressing stress, CFRP areas.The main factors impacting on the cracking load,bearing capacity, ultimate curvature and failure modes of the reinforcement beams were studied and the design recommendations were given. The study results showed that the prestressing stress and areas of the CFRP were selected appropriately and the failure modes of the reinforcing member were controlled near the boundaries of the destruction, so the optimum strength and deformation of the beams can be achieved.

关 键 词：预应力 预应力筋面积 承载力 曲率 破坏形态 

分 类 号：TU375.1[建筑科学—结构工程]