Modular building is considered as the highest prefabricated rate and becomes a major trend in the field of building industrialization.Modular concrete building is gaining lots of attention due to the excellent properties on fire resistance,anti-corrosion,thermal and sound,economy and living comfort.The development of modular concrete building at home and abroad is introduced from four aspects,including concrete modular unit type,inter-module connection type and mechanical behaviors,lateral load resisting system.It is found that prefabricated modules can be classified into three structural systems depending on load transferring mechanism:wall supported module,column supported module and non-load bearing module.There are also three inter-module connections:wet connection on-site,bolted connection and pre-stressed reinforcement connection.Wet connection would provide good integrity and be friendly to finish,while too much work has to be done on site and the rate of construction is slow.Bolted connection has a less on-site work and rapid construction,while the integrity is worse than wet connection.There are four main lateral load resisting systems:module-core system,module-podium system,infilled frame system and stacked box structural system.High-rise building always applies the first three systems while multistory buildings can apply the last system.Although,there are several modular concrete buildings in practice,limited research can be found on their mechanical behavior.The related research far lags behind the engineering practice.In addition,concrete module has a higher weight resulting in handling and transportation issues and slow erection process due to wet connection,all the defects block the development of modular concrete building.
modularizationconcreteconnection jointmechanical behaviorslateral load resisting system
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