Load-Bearing Capacity Evaluation of a Suspension Bridge with Steel Truss Beam Based on Static Load Test
基于静载试验钢桁梁悬索桥承载能力评估分析

Most of Minisize span suspension bridges with steel truss beam constructed in early age will approach its designed working life. Correctly evaluateing its load-bearing capacity is the basic foundation of maintaining, strengthening and technical reconstruction. First, load-bearing capacity evaluation based on static load test was briefly introduced in this paper. Taking Chengnan bridge as an example, the main existing damages and their causations were summarized and analyzed. Adequately considering the field detection datum and original design load rating, a finite element mode with some damages was established.Then, though analyzing the calculatation results, the scheme of static load test was confirmed. Through comparing the static load test results with the results of upgraded finite element, the load-bearing capacity conditions of existing bridge structure were evaluated. In order to resume its load-bearing capacity, some of strengthening measurements and suggestions were proposed.