Japan, South Korea and other Asian developed countries have fully absorbed the successful experience of Europe and the United States, based on their development mode and technical system, and according to their own development requirements, conducted in-depth research on the overall seismic and isolation design of precast concrete structure system, such as focusing on the connection performance of precast concrete composite floor slab, The dry connection method with better shear resistance is put forward; The aseismic performance of the connections at the key parts of the cast wall is studied and tested, which further expands the basis of the technical research theory of the cast structure system.

1 research status of precast buildings at home and abroad 1.1 development and research status abroad precast concrete (PC) has been developed abroad for many years.

Abstract: with the concept of sustainable development and green building, precast building has become the development direction of the construction industry.

In the 1950s, in order to solve the housing problem caused by the Second World War, European countries represented by Denmark and Sweden took the lead in setting off a climax of housing industrialization; Under the influence of the development of housing industrialization in Europe, North American countries such as the United States and Canada began to implement mechanized production and assembly construction in the 1970s.

Compared with the characteristics of high energy consumption and high pollution of traditional buildings, precast buildings are more energy-saving, efficient and environmental friendly, with high resource utilization rate, easy control of part quality and short on-site assembly construction cycle.

According to relevant statistics, 56 national housing industry bases and 11 pilot cities of housing industrialization have been established in China, and the newly-built precast building area in China has exceeded 140 million m2.

Precast building is a kind of building with factory produced concrete precast components as the main components, which is assembled, spliced or combined with partial cast-in-situ.

1.2 general situation of domestic development and research status: China began to study the construction technology of precast concrete buildings in the 1950s, and vigorously promoted the standardization, industrialization, mechanized production and on-site assembly construction of components; In the early 1980s, a series of precast concrete building systems such as precast frame system, Yugoslav system and precast large slab building system have been formed; At the same time, all kinds of precast roof panels, precast roof beams, precast walls and precast hollow slabs are widely used in practical projects, which has played an important role in promoting the development of precast buildings in China.

Japan has perfect standards and specifications for the design, production and construction of precast building system, and the prefabrication rate of precast buildings is also relatively high.

More than 30 provinces, cities and autonomous regions have issued targeted guidance and relevant supporting measures for the development of precast buildings, and some places have put forward clear development requirements for precast buildings..

The development of precast buildings in Russia is also relatively early, which has developed since the Soviet Union.

Facing the increasingly severe environmental and resource crisis, it is urgent to change the original production mode of traditional buildings, and fully consider environmental protection and rational utilization of resources.

With the continuous improvement of construction enterprises and society’s cognition of precast buildings, more and more enterprises have significantly changed their attitude towards the development of precast buildings.

According to relevant data, the application density of precast concrete structures in the United States, Russia, Denmark and other countries is 35%, 50% and 35% ~ 40% respectively, which has been in a dominant position in civil engineering structures.

However, at that time, due to the backward technology of precast concrete, lack of on-site construction experience, chaotic management of construction site, low construction quality (such as anti-seepage and poor thermal insulation performance of exterior wall), single house structure, small span of precast components and low bearing capacity, as well as imperfect supporting laws and regulations, technical standards and construction management system, Unable to meet the social needs, the precast building has been constantly resisted by people in the application process.

Therefore, the development of construction industry urgently needs to realize the modern production mode characterized by standardization, industrialization, intensive production and on-site assembly construction.

Under the background that the State advocates the development of low-carbon, environmental protection, energy conservation and green buildings, precast buildings have great competitive advantages.

This paper summarizes the hoisting, positioning and anchoring measures of precast components of precast buildings, and puts forward a new construction mode of precast buildings; At the same time, it has also accumulated a large number of on-site construction experience of precast buildings, forming a special system of precast concrete structures and a standardized product series of precast components; According to the requirements of height, shape and span, the engineering standard and application guidance manual of precast concrete structure are compiled, which provides a reference basis for the quality, safety and schedule management of precast building construction process.

With the encouragement and call of the government, many enterprises have actively promoted the development of new building industrialization and building energy conservation from the original wait-and-see attitude to the present.

This paper combs the research literature of precast buildings at home and abroad in recent years, summarizes the research results of precast buildings at home and abroad, compares and analyzes the shortcomings of the development research of precast buildings in China, and provides reference for follow-up research.

Key words: precast building; Development direction; Research results 0 Introduction: the traditional extensive production mode of buildings has many problems, such as long construction cycle, high energy consumption, heavy pollution, low production efficiency and low degree of standardization.

Therefore, the precast building did not realize large-scale construction and sustainable development, and was gradually replaced by the cast-in-situ concrete system with more mature technology in the later 1990s.

At present, European and American countries have made more achievements in the research of technical system.

At present, a variety of precast concrete structure systems have been formed, and have been widely used in schools, hospitals and other projects.

In particular, large state-owned enterprises have gradually increased their investment in building industrialization.

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