基于应力释放法的在役组合钢桥承载力评定  

Evaluation for existing truss-cable composite continuous steel bridge based on stress release method

作　　者：赵煜[1] 贺拴海[1] 

机构地区：[1]长安大学桥梁与隧道陕西省重点实验室,陕西西安710064

出　　处：《长安大学学报（自然科学版）》2006年第5期40-42,47,共4页Journal of Chang’an University(Natural Science Edition)

基　　金：国家西部交通建设科技项目(200538181215)

摘　　要：为了提高在役钢桥承载力评定的准确性,针对在役钢桥受力特点,提出基于应力释放法的在役钢桥承载力评估方法。采用应力释放法获得恒载状态钢桥部分杆件实际应力,结合实测材料力学参数,通过全桥结构仿真建模分析,外推全桥构件恒载应力分布状态,从而得到桥梁的真实承载能力,同时给出了评定步骤和工程实例。实桥应用表明,以应力释放法为主的钢桥承载力评定方法,理论依据充分,评定精度高,易于实施,可广泛应用于同类桥梁的评估。In order to develop the assessment accuracy of the existing steel bridge＇s technical state, based on the characteristic of the existing steel bridge, the loading capability evaluation of the bridge is studied by using stress release method to get the stress condition of bridge＇s part components. Combined with the mechanical parameter of the tested material, the whole structure＇s stress distribution is deduced with simulation analysis model. The assessment procedure of an example is presented. The results show that the stress release method for the existing steel bridge can be extensively used in other bridges for its profound foundation and high accuracy as well as feasible implement. 1 tab, 3 figs, 6 refs.

关 键 词：桥梁工程 连续索桁组合钢桥 应力释放 仿真分析 承载能力 评估方法 

分 类 号：U446[建筑科学—桥梁与隧道工程]