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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。
Shenzhen, a 8-storey building short-legged simply supported notched beam ends in the main structure after the completion of the more serious cracking. Through the crack survey of the damaged structure by ultrasonic testing of the fracture depth, it is found that the fractures can be divided into many types; the fracture forms are complex and the fractures are deep, most of them are through cracks, which seriously affect the bearing capacity of the components. Based on the analysis of the causes of cracks and the impact on the structural safety, a comprehensive analysis is taken to reinforce the structure by adopting a variety of reinforcement methods such as bearing support, increasing cross-section and sticking steel, and achieved good economic and social benefits. Can provide a reference for similar projects.