预应力混凝土槽形梁静力行为研究  

Study on static behavior of prestressed concrete trough girders

作　　者：徐勋[1] 肖林[1] 王炎[2] 司秀勇[3] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]浙江大学土木工程系,浙江杭州310058 [3]燕山大学建筑工程与力学学院,河北秦皇岛066004

出　　处：《铁道建筑》2013年第1期1-4,共4页Railway Engineering

摘　　要：为了解槽形梁静力行为,进行了一片预制预应力混凝土槽形梁的模型试验,分别考虑跨中最大弯矩及梁端最大剪力两种荷载工况对试验模型进行加载,测试了试验模型的控制断面的应力、变形。并采用非线性有限元分析方法对槽形梁的力学特性进行了研究。试验和研究得到了如下结论:该槽形梁的剪力滞效应较为突出,具有明显的开口薄壁杆件特征,底板的空间板效应明显,在设计荷载作用下结构处于线弹性状态,具有一定的安全储备。In order to investigate the static behavior of channel beam, this paper made a model test for a channel shape preeast prestressed concrete beam, which is loaded by considering two different engineering conditions of the maximum bending moment at the middle span and the maximum shear at the beam end respectively, obtained the stress and deformation for control section of test model, and studied the mechanical property of channel beam through adopting .the nonlinear finite element analysis. The results showed that shear lag effect of the channel beam which has the feature of open thin-walled member is prominent as well as space plate effect of the backplane, and the structure of channel beam is in linear elastic state under the design loads and has certain security reserve.

关 键 词：预应力混凝土槽形梁 模型试验 静力行为 有限元分析 

分 类 号：U448.53[建筑科学—桥梁与隧道工程]