预制拼装连续梁体外预应力索力测定与评估  

Measurement and Evaluation of External Pre-stressing Force of Precast Assembled Continuous Beam

作　　者：周家刚 

机构地区：[1]江苏苏通大桥有限责任公司,江苏南通226001

出　　处：《城市道桥与防洪》2016年第1期48-50,8,共3页Urban Roads Bridges & Flood Control

摘　　要：针对预制拼装连续梁体外预应力不足,易导致混凝土开裂甚至影响结构安全的情况,研究了体外预应力索尚存拉力测定方法与分析,并通过有限元模拟分析,探讨了实际体外索索力下预制拼装连续梁桥结构应力状态,为此类桥梁的管理与养护工作提供了技术支持。Aiming at the insufficient external pre-stressing force of precast assembled continuous beam easily to bring about the concrete cracks and even to affect the structure safety,the article studies the method to analyze and measure the remaining tension of external pre-stressed cable.According to the finite element simulation analysis,the article discusses the structural stress state of precast assembled continuous beam bridge under the practical external cable force,which provides the technical support for the management and maintenance of this kind of bridge.

关 键 词：连续梁桥 体外预应力索 索力 预应力损失 应力状态 

分 类 号：U446[建筑科学—桥梁与隧道工程]