Research On Shear Performance Of Combined Steel Underpinning Joint Glued With Concrete Column

In today's rapid development of national economy,with the pace of urbanization and urban renewal faster and faster,the construction of large open to build concept is not in conformity with the national sustainable development strategy.Development and inheritance,demolished in harmony with the protection of the sustainable development concept gradually become social consensus.Construction of existing buildings,especially in history and culture by strengthening to improve its use function,or by the overall shift for the new planning for maneuver,through these means buildings can be the continuation of history and make them to be bloom,and can promote the development of the city and reduce the consumption of resources,in the contemporary but benefits centuries.The overall shift technology of buildings refers to under the buildings and structures integrity and sustainable premise,shift the buildings from the old site to the new site.In these process,the underpinning structure design is a key technology in building translation.Underpinning method using existing materials are mainly concrete.In this process it consumes cement,sand,stone consumption of large.These materials are non renewable resources,one-used materials,polluted and waste.A new underpinning method is proposed in this paper column-paste composite steel concrete column underpinning method.The main material of underpinning device are steel plates and sections.This method can reduce material,less polluted and be recycled,.It is a green method in accordance with the environmental protection requirements.This article mainly introduce the concrete column paste combined steel underpinning method.The static loading test has been done through the 9 joints,In this experiment we used strain gauges and a torque wrench to control the underpinning beam's pre-tightening force,and used pillars of the dial indicator to measure the relative displacement underpinning beams and column.To Summary of experimental phenomena and analysis test data,the bearing capacity calculation formula of the method and structural design suggestions is given.The test results show that underpinning beam calculation model is according to the flexural member under concentrated load calculation;Paste is deduced by the experimental data of concrete column underpinning.Node packaged steel shear bearing capacity of friction coefficient is 1.3.At the end,the article summarizes the consequence of the Paste combined steel underpinning node shear performance researching and shortcomings,and offers some suggestions to the theory researching and reference for future engineering application.