大跨度钢筋混凝土结构裂缝分析实例

Examples of Investigating Cracks in Long Span Reinforced Concrete Structures

分析了一幢四层的钢筋混凝土框架结构弧形屋面厂房和一座非预应力空心板产生裂缝的原因。经过现场检测、对空心板的荷载试验和结构分析计算,表明裂缝产生是结构设计考虑不周、存在设计差错所致,这些问题容易被忽视,故提出来供设计人员参考。

Two projects of cracking in long span reinforced concrete structures are investigated. One project is a fourstory reinforced concrete frame workshop with arc roof and the other is a hollow slab bridge with no prestressing force. After site inspection, load testing of hollow-slab bridge and structure calculation, cracks are mainly owed to the improper structure design. The pitfalls in design are put forward for designers to avoid them.