The Research Of The Impact Load Of Rain Induced Wind On Rammed Earth Wall Of Earth Building

Fujian earth building has a long historical value and the humanistic value, madethem list on the world’s cultural heritage. In terms of architecture, in consideration ofits characteristics of building technology and environmental protection concept,makes the study of the building in full swing. Because Fujian earth building is locatedin the southeast coastal areas of our country, its special geographical position, makesthe building often attacked by heavy rainfall which carried by typhoon and otherextreme weather.The typhoon login, followed by storm will hitting the rammed earthwall of the building, and raindrop impact it, lead to the rammed earth wall producedbigger impact load, making the rammed earth wall structure damaged, reduce the loadbearing part of the wall, and reduces the bearing capacity and durability of therammed earth wall. As a world cultural heritage, the protection of Fujian earthbuilding is imperative. In this paper, the method of combining theoretical analysis andmodel test were used to study systematically the impact load of rammed earth wall ofwind driven rain, for the wind and rain erosion damage of Fujian earth building laid agood foundation.In this paper, research work mainly includes the following aspects(1) To carrying the theoretical derivation of the wind driven rain impact load onthe earth building rammed earth wall. At first, from a single raindrop driven by thewind hit the surface of the earth building rammed earth wall. According to a series ofassumptions deduce the overall impact load and its normal and tangential componentwhen the single raindrop driven by the wind hit the rammed earth wall surface, andanalyze the related influencing factors. In the second, according to the characteristicsof rainfall, derived the impact load and its normal, the tangential component of load ofthe rammed earth wall which hit by the wind-driven rain,and analyze the relatedfactors.（2）The impact load test of the rammed earth wall by the wind driven rain. Usingthe correlation of wind and rain equipment, with a laser displacement meter todetermine the deflection of the collision of the cantilever beam by the function ofwind and rain in the specific working conditions, and launched the impact of positiveequivalent uniformly distributed load under the action of wind and rain together. Andaccording to the positive equivalent uniformly distribute load under the action of pure wind, to derive under the corresponding conditions the impact of positive equivalentuniformly distributed load that the raindrop impact model generates, and analyze itsrelated factors.(3)According to the angle which is measured in the wind tunnel tests theraindrops impact model with the horizontal plane, and the total equivalent uniformlydistributed load and tangential equivalent uniformly distributed load are derived bythe positive equivalent uniformly distributed load that the raindrops impact modelgenerates, and analyze its related factors.(4)In the same condition, comparing the results of the theoretical derivation andexperimental results,analysising the feasibility of the results of the experiment andtheoretical derivation. To provide scientific basis for the protection of the earthbuilding.