山区乡村房屋模型洪水冲击试验研究

洪水对山区乡村房屋冲击作用的试验研究成果,可为山区乡村房屋的抗洪设计和抗洪能力评价提供依据。试验主要研究到溃口不同距离处的乡村房屋所受的洪水冲击作用。采用3种开洞率模型进行试验,研究洪水在不同距离、不同开洞率的情况下对房屋结构的冲击荷载分布、冲击力大小以及冲击弯矩的影响,得出了荷载分布规律和冲击力、冲击弯矩的变化规律。研究结果表明,迎水面冲击荷载沿水平方向的变化无明显规律,沿竖直方向随着高度的增大而逐渐减小;冲击力随着房屋到溃口距离的增大而增大,而开洞率对其影响不明显;冲击弯矩、冲击作用力随着距离的增大而增大,随着开洞率的增大而减小。

Experimental Study on the Impact of Flood on Rural Building Model with the Liquid in a Cylindrical Container under Pitching Excitation

Recently,frequent torrential floods cause tremendous casualties and economic losses to the national people in China.In this paper,three 1:6 scale rural building models are tested to research the impact of flood in order to gain the basic data for the flood-resistant design of rural buildings.The impact experiment of flood on buildings is carried out in the large wave-current tank.The height of water is 0.6 meter and the distances between the building and flood gate are 3,6 and 9 meters respectively.The impact loading is obtained by the sensor transducer.Based on the experimental results,the effects of different distances and different ratios of holes on the impact loading of flood are investigated.Results show that the variation of impact loading distributions in the horizontal direction is not obvious but decreases gradually with the vertical distance from bottom to top in the vertical direction.The impact loading increases with the distance whereas is independent of the ratio of holes.The bending moment and impact force increase with the distance,but decrease with the ratio of holes.