双撑杆智能预应力钢桁梁约束承载力试验研究  

Bearing Capacity Experiment of Smart Prestressed Steel Truss with Two Struts

作　　者：徐伟炜[1] 陈樑明 Xu Weiwei Chen Liangming(School of Civil Engineering, Southeast University, Nanjing 210096, China Hordor Design Group, 361004, China)

机构地区：[1]东南大学土木工程学院,南京210096 [2]厦门合道工程设计集团有限公司,361004

出　　处：《特种结构》2016年第6期97-101,共5页Special Structures

基　　金：国家自然科学基金资助项目(51208094);江苏省自然科学基金资助项目(BK2012342)

摘　　要：为探讨约束参数对智能预应力钢桁梁承载性能的影响,本文基于开关控制算法,以跨中挠度为控制目标,采用数字信号控制系统进行了双撑杆智能预应力钢桁梁模型在移动荷载作用下的主动控制试验。试验对比研究了普通钢桁梁、普通预应力钢桁梁和智能预应力钢桁梁在跨中挠度和杆件应力约束条件下的最大承载力。试验结果表明智能预应力钢桁梁具有更高的约束承载力,特别适用于对钢桁梁变形有严格限制或可变荷载与永久荷载比值较高的情况,为工程应用提供了参考。In order to discuss the impacts of deflection constrain range and stress constrain range on the bearing capacity of the smart prestressed steel truss, an active control experiment of a smart prestressed steel truss model which adopt switch control algorithm and digital signal control system, and used the mid-span deflection as feedback was investigated. The experimental bearing capacity of a conventional steel truss, a conventional prestressed steel truss and a smart prestressed steel truss with deflection and stress constraints was comparative analyzed. The results showed that, under the same constrains, the bearing capacity of the smart prestressed steel truss can be much higher than that of the conventional truss, especially when the constraints are strictly limited. All of these lay a good foundation for engineering application.

关 键 词：钢桁梁 智能预应力 模型试验 承载性能 约束条件 

分 类 号：TU394[建筑科学—结构工程]