某工程大跨简支缺口梁开裂事故的检测鉴定及加固处理  

TEST APPRAISAL AND REINFORCEMENT FOR A BUILDING'S CRACKED LARGE SPAN SIMPLY SUPPORTED BEAM

作　　者：刘文竞[1] 杨建中[1] 王霓[1] 

机构地区：[1]建研科技股份有限公司深圳分公司,广东深圳518057

出　　处：《工业建筑》2011年第6期142-145,共4页Industrial Construction

摘　　要：深圳某8层建筑大跨简支缺口梁简支端在主体结构竣工后出现较为严重的开裂。通过对受损结构进行裂缝普查以裂缝深度超声检测,发现裂缝可分为多种类型;裂缝形式复杂,且裂缝深度较深,大部分为贯通裂缝,严重影响构件承载力。在分析裂缝开展原因及对结构安全性影响程度的基础上,综合分析采取支座处理、加大截面、粘钢等多种加固方式对该结构进行加固处理,取得了良好的经济和社会效益,可为类似工程提供参考。More serious cracking occurred at the simply supported end of large-span simply supported notched beam for a 8-story building after completion of its main structure in Shenzhen,Through cracks census of the damaged structure and ultrasonic testing of crack depth,it was found that the cracks could be divedes into several types,which were complecated and deeper,most of them were pass through ones,thus resulting in serious influence on the bearing capacity of the members.Based on analyzing the cause of the cracks and their influencing degree on the structural safety,the measures such as support treatment,enlargement of section and bonding steel plate etc were taken,by which excellent economic and social benefits had been got.

关 键 词：缺口梁 开裂 支座 加固 

分 类 号：TU746.3[建筑科学—建筑技术科学]