This paper presents the application of long, complicated isolated buildings in large scale infrastructure in cold region in China, and carried out quantitative study on the effect of low temperature in long isolated buildings. Substaincial progress has been made in base isolation technology in the world during the past two decades, in that not only the number of applications of base isolation increased rapidly, but also many large sacle buildings have been built worldwide. China is among those earthquake prone countries in the world where lots of long, complicated isolated buildings have been built, including several lagest isolated airport, largest railway station and largest urban complex in the world. Some of these large scale isolated buildings are located in cold region in China, and obvious thermo displacement shown up during construction stage, which aroused the attention of isolation comuunity on the life cycle performance and safety of the long isolated buildings in cold region.

To investigate how low temperature affects the mechanical behavior of the rubber bearing, a microscopic observation of the effect of low temperature on the rubber isolator is carried out using differential scanning calorimeter (DSC) to determine the scope of freezing low temperature for the isolator to achieve. A mesomechanics model is employed to analyze the effect of micro damage on rubber bearings due to large displacement under low temperature. The dividing of construction elements of isolation layer in a long isolated buildings has been studied using such FEM software tool as Abaqus and SAP2000. The optimum construction scheme of several long isolated buildings has been suggested and verified through machine vision based monitoring in airports and urban complex buildings in typical cold regions in China.