应力波和超声波检测在木拱廊桥安全评估中的应用  

Application of stress wave and ultrasonic testing for safety evaluation of timber arch bridges

作　　者：郑益锋 王宇航 林睿睿 岳小泉 盛叶 陈开锋 ZHENG Yifeng;WANG Yuhang;LIN Ruirui;YUE Xiaoquan;SHENG Ye;CHEN Kaifeng(College of Transportation and Civil Engineering,Fujian Agriculture and Forestry University,Fuzhou 350000,China)

机构地区：[1]福建农林大学交通与土木工程学院,福州350000

出　　处：《哈尔滨商业大学学报（自然科学版）》2024年第1期64-70,共7页Journal of Harbin University of Commerce：Natural Sciences Edition

基　　金：福建省科技厅自然科学基金面上项目“常温和高温下重组竹材料本构模型研究”(2020J01579);福建省林业科技项目“竹材结构材在建筑领域的绿色高值化利用”(闽林科(2020)29号);福建省教育厅中青年教师教育科研项目“电阻法在不同温度和含水率下定量检测木材内部腐朽研究”(KLA19021A)。

摘　　要：木拱廊桥是木结构古建筑中重要的文化遗产,现存的部分木拱廊桥仍在使用中.为保护木拱廊桥,考虑各种复杂的环境因素和结构条件,将应力波和超声波检测技术应用于真实环境下的木拱廊桥检测中.挑选福州市闽侯县远济桥的承重木柱作为研究对象,针对木柱内部缺陷采用应力波检测与超声波检测.检测结果表明应力波和超声波检测木材缺陷时,超声波的检测精度更高,二者检测结果存在相似性;远济桥检测样本的承重木柱存在空洞、裂纹、虫蛀等缺陷,建议对远济桥的安全性进行优化和改进.基于木拱廊桥所处环境的实际情况,利用应力波和超声波检测相对照的检测方法,提出针对木拱廊桥的安全性等级进行划分,使应力波和超声波检测技术更好地应用于木拱廊桥的保护工程中.Wooden arch bridges are important cultural heritage sites in the field of ancient wooden architecture.Some of the surviving wooden arch bridges were still in use,and protecting them required consideration of various complex environmental factors and structural conditions.In pursuit of this goal,stress wave and ultrasonic testing technologies were applied to detect issues in wooden arch bridges in a real-world environment.Specifically focusing on the load-bearing wooden columns of Yuanji Bridge in Minhou County,Fuzhou,stress wave and ultrasonic testing were employed to identify internal defects in the columns.The results indicated that ultrasonic testing exhibited higher detection accuracy for wooden defects compared to stress wave testing,despite both methods yielding similar results.The load-bearing columns of the sampled Yuanji Bridge displayed defects such as voids,cracks,and insect infestation,underscoring the necessity for safety improvements.In consideration of the actual environmental conditions of the wooden arch bridge,a detection method that compared stress wave and ultrasonic testing was proposed to categorize the safety level of wooden arch bridges.This approach aimed to enable more effective utilization of stress wave and ultrasonic testing technologies in the protection of wooden arch bridges.

关 键 词：木拱廊桥 木材缺陷 应力波 超声波 无损检测 

分 类 号：TU759[建筑科学—建筑技术科学]