| Arch structure possesses not only good load bearing property, but decoration and beauty effect. It is a structure in the shape of arc. Because of the difference of architecture type, the form of arch structure is different. As early as 4 BC, the arch structure came out in double-river region and Babylon, Assyria, India, Rome afterward. Arch structure in the shape of hemicycle is the symbol of old Rome architectures, while arch structure in the shape of needle is the characteristic of Gothic architectures and needle shape, horseshoe shape, bow shape are the sign of Islam structure.The introduction of arch structure to china is late, which goes through air brick beam slab, needle shape arch, zip shape arch. The Chinese arch structure formed before the prophase of Xi Han dynasty. In that time, the arch structure uses in tombs. The use of arch structure in up ground structures is Wei Jin. It is used in arch bridge when the time of Dong Han, in circumvallation gate when the time of Song dynasty. Afterward, it is used as roof which is called non-beam palace. The record of arch structure is founded in Ying Zao Fa Shi and Gong Cheng Zuo Fa.The folk house in shape of arch is mainly in the north of china, which is called cave-house. According to the structure types, it is divided into tube-shaped arch, t-shaped arch, cross arch, buttress arch. Taking the loess plateau as an example, this thesis focused on the application of arch structure to the Chinese folk house. From the angle of structure mechanism, it analyzes the different condition of different arch type in order to discuss the space, solidity and improvement of arch structure. |