林区公路混凝土梁桥实测挠度限值的探讨  

RESEARCH ON THE LIMITING VALUE OF TEST DEFLECTION OF HIGHWAY CONCRETE BEAMS BRIDGES IN FOREST REGIONS

作　　者：王春发[1] 钱寅泉[1] 齐怀恩[1] 

机构地区：[1]东北林业大学,黑龙江省林业设计研究院

出　　处：《林业科学》1994年第5期464-470,共7页Scientia Silvae Sinicae

摘　　要：为正确评价林区现有桥梁的技术状态，本文论述了林区钢筋混凝土及预应力混凝土简支梁桥理论计算挠度限值与实测挠度限值的不同．并在分析荷载试验资料的基础上，参照铁路部门的规定，提出了林区钢筋混凝土简支梁桥在使用荷载作用下的实测挠度限值为跨径的１／３０００、预应力混凝土简支梁桥为跨径的１／１６００，该限值可作为荷载试验评定桥梁质量时的刚度指标。In order to evaluate technich condition of bridges in forest regions properly,the difference between theory and test value of deflection on reinforced concrete and prestressed concrete beams bridges which are simply supported in forest regions is analysed by authors in this paper.According to test date and the regulation on railway bridges; the limiting values of test deflection are given which are 1/3000 of beam span simply supported to R.C.beams bridge and 1/1600 to P.C.beams bridge.The limiting value can be rigidity standard when supporting test evaluate bridges.

关 键 词：混凝土桥 挠度 限值 林区公路 

分 类 号：S773.4[农业科学—森林工程]