在役预应力混凝土简支梁现存预应力的有限元模拟研究  

The finite element simulation analysis of the extant pre-stressed force of in-service pre-stress concrete simply-supported beam

作　　者：黄颖[1,2] 房贞政[1] 

机构地区：[1]福州大学土木工程学院,福建福州350116 [2]福建船政交通职业学院建筑工程系,福建福州350007

出　　处：《福州大学学报（自然科学版）》2013年第6期1110-1114,共5页Journal of Fuzhou University(Natural Science Edition)

基　　金：福建省交通厅交通科技资助项目(201336)

摘　　要：以大型有限元分析软件ANSYS建立预应力混凝土简支梁的有限元模型.分别采用实体单元模拟梁和用杆单元模拟预应力筋模拟预应力效应,获得梁张拉预应力和结构挠度之间的关系.分别建立梁的挠度、静刚度与预应力的回归关系,推导在竖向荷载一定的情况下梁的挠度与现存预应力之间的统计回归公式,借以预测梁的永存预应力,为结构中预应力损失的研究提供一定参考.The pre -stress simple -supported beam is calculated by ANSYS software. Beam and pre - stress reinforcement are simulated by solid and link elements and it is effective for simulation of pre -stress. The relationship between the prestress of beams and the structural deflection obtained through the finite element simulation. In the application of mathematical statistics regression analysis, the paper established the regression relationship between deflection and static stiffness with prestress. At the same time the paper deduced the statistical regression formula between the deflection of the beam and the existing prestress under the vertical load in certain circumstances according to the regres- sion analysis of the data. The purpose of this study is predicting the perpetuation of pre - stress, and at the same time to provide a reference for prestress loss in prestressed structures.

关 键 词：在役预应力简支梁 挠度 静刚度 回归分析 

分 类 号：TU311.3[建筑科学—结构工程]