简支T梁荷载试验校验系数准确性分析

Accuracy Analysis of Experiment Verification Coefficient for Simply Supported T-beam Load Test

对于在役桥梁在使用一段时间后,需要了解桥梁的健康状况,由于荷载试验是一种比较简单的方法,往往通过荷载试验对其承载进行评定。在荷载试验中,一项评定承载能力的重要指标就是校验系数,但是对桥梁进行理论计算分析时往往会对桥梁实际结构形式进行简化,从而导致校验系数与实际情况不符,不能准确评定桥梁的承载能力。本文通过研究桥面铺装、防撞护栏和弹性模型三种因素,分析其对简支T梁桥校验系数的影响。

For in-service bridges,it is necessary to understand their health condition after a period of use.As load testing is a relatively simple method,its load-bearing capacity is often evaluated through load testing.In load testing,an important indicator for evaluating the bearing capacity is the verification coefficient.However,when conducting theoretical calculations and analysis of bridges,the actual structural form of the bridge is often simplified,resulting in a discrepancy between the verification coefficient and the actual situation,which cannot accurately evaluate the bearing capacity of the bridge.This article analyzes the impact of three factors,namely bridge deck pavement,crash barriers,and elastic models,on the verification coefficients of simply supported T-beam bridges.