%0 Journal Article
%T 顺几河大桥荷载试验与承载能力评估<br>Load Test and Carrying Capacity Evaluation of Shunji River Bridge
%A 贾
%A 毅
%A 吕
%A 梁
%A 纪云涛
%A 李均进
%J 建筑科学与工程学报
%D 2017
%X 为了评价顺几河大桥的技术状况和承载能力，抽取其中的4跨连续梁进行了静载试验。试验测试了控制截面上各测点的应变和挠度值，并与相应的理论计算值进行了比较。结果表明：所有工况下求得的荷载效率系数值均介于0.95~1.05之间；各试验工况下，T梁测试截面实测应力校验系数介于0.46～0.92之间，各测点的挠度校验系数介于0.35～0.78之间,该桥的结构强度和刚度具有一定的富余度，能较好满足实际运营；控制截面上多数测点的相对残余应变和挠度值为0，结构的多数位置均处于弹性工作状态，部分应变和挠度测点出现残余应变和挠度，其相对最大值分别为17.4%，16.7%，表明该桥在试验荷载下无较大不可恢复变形；结构整体的横向连接可靠，刚度分配均匀，技术状况和承载能力能够满足正常使用要求。<br>In order to evaluate the technical condition and carrying capacity of Shunji River Bridge, four span continuous girders in the bridge were sampled to carry out static loading test. The strain and deflection of testing points in control sections were gained by test, and the results were compared with relative theoretical calculation values. The results show that load efficiency coefficients in all cases are between 0.95 and 1.05. Under different test cases, the measured stress calibration coefficients of T-beam are between 0.46 and 0.92, and the deflection calibration coefficients of test points are between 0.35 and 0.78.The structural strength and stiffness of the bridge have a certain degree of surplus, which can meet the actual operating conditions well. The relative residual strain and deflection of most measure points in controlling sections is 0 and most locations of the structure are in the elastic state. The partial strain and deflection points appear the residual strain and deflection, the relative maximum of which is 17.4% and 16.7% respectively, which indicates that the bridge has no large unrecoverable deformation under test load. The whole structure has reliable cross connection and uniform stiffness distribution. Technical condition and carrying capacity can satisfy normal serviceability requirements
%K 桥梁工程
%K 连续梁桥
%K 试验研究
%K 校验系数
%K 效率系数
%K 承载能力&lt
%K br&gt
%K bridge engineering
%K continuous girder bridge
%K experimental research
%K verification coefficient
%K efficiency coefficient
%K carrying capacity
%U http://jace.chd.edu.cn/oa/DArticle.aspx?type=view&id=20170614