The damages of bearing construction in not conserved buildings and the research into their suitability for future exploatation
研究了未完工建筑中钢筋混凝土承重结构因暴露于降水而开裂的问题，特别是多孔空心板在冻融作用下的破坏机制，并采用微型摄像头检测裂缝，为评估结构未来使用适宜性提供依据。
Summary There are frequent cases when load‐bearing reinforced concrete structures of not completed buildings are directly exposed to precipitation (rainfall, snowfall) and to environment of positive and negative temperature. Multihollowcore concrete slabs are especially vulnerable to such actions since investigations of condition of non‐conserved buildings indicate that these slabs can crack critically. Water accumulated in hollows of slabs and frozen under negative temperature can split concrete in vertical walls between hollows, inflict concrete cracking below hollows or spalling of large sections together with longitudinal reinforcement in them at the bottom of slabs. In performed investigations of condition of non‐completed and non‐conserved load bearing structures a modern method was employed for the determination of cracking in walls between hollows of slabs, using mini video‐camera. Analysis of cracking in slabs indicated that the character of cracking is governed by the quantity of water accumulat...