摘要
在桥梁的使用过程中,部分桥梁由于各种自然原因或设计施工误差而产生不同程度的损伤与破坏。对于这些桥梁,需采用桥梁检测的方法,来确定其承载能力和使用性能是否能够继续满足要求。在所有桥梁检测项目中,静载试验是能够了解桥梁实际工作状态和承载能力,提供直接可靠数据的重要手段。某桥为预应力混凝土三跨(76m+138m+76m)连续刚构桥,1999年建成通车,为确定其承载能力和使用性能是否能够继续满足要求,通过MIDAS建模分析及静载实验得到应力及挠度理论值、实测值。两者通过对比得到结论:该结构仍处于弹性工作状态,结构抗力大于设计值,但结构实际刚度已偏低。
In the process of using bridges,part of the bridges produce different degrees of damage and destruction due to natural causes or design. For these bridges,it is necessary to adopt the method of bridge detection,to determine whether the carrying capacity and performance in service can continue to meet the requirements. Among the detection projects,static load test is a way to be able to understand the actual working status and carrying capacity of bridges,also is an important means to provide direct and reliable data. A continuous rigid frame bridge with the span of 76 m + 138 m + 76 m is opened in 1999. After comparing the theoretical and measured stress and deflection which is obtained by the MIDAS modeling analysis and the static load experiment,the conclusions of testing whether the carrying capacity and performance in service can continue to meet the requirements is gained : the structure resistance is greater than the designed value,but the actual stiffness has been on the low side.
出处
《施工技术》
CAS
北大核心
2017年第S1期1282-1284,共3页
Construction Technology
关键词
城市桥梁
连续刚构桥
静载试验
应力
挠度
urban bridges
continuous rigid frame bridge
static load test
stress
deflection
