Remodeling business could be satisfied for quality of life and the standard of living highly elevated and as an environment friendly policy which minimize consumption of resources could be said as a strong influential dwelling environment improving method. But the most of the apartment houses which are the objects for remodeling are not designed as aseismatic structures. So, if we make them as horizontal or vertical remodeling of extension, they should be put into aseismatic reinforcement and could not be helped escaping from foundation reinforcement with the increasing of loads. And also, they are not newly constructed buildings. The most of them are over 20 or 30 years old buildings, so we have to think of wornout degree of buildings. Technical testing or system of examination should be checked for the design methods or construction methods from the time of design to construction. Likewise, we are going to examine the reasonable method for the requirements of remodeling business.
Firstly, aseismatic reinforcement designs are as following diagram of process. aseismatic performance evaluation of existing buildings → selection of construction for aseismatic reinforcement → aseismatic reinforcement design → aseismatic performance evaluation after reinforcement design → aseismatic reinforcement construction
Aseismatic performance evaluation of existing building and aseismatic performance evaluation after reinforcement design are not elasticity analysis method. They are done by nonlinear (non-elasticity) analysis and are effective to show performance characteristics of the structures. And also, they are rational reinforcement design which could be escaped and they were judged on the aseismatic performance of buildings against the designed earthquake.
Secondly, foundation reinforcement method is used according to the increasing loads. Because of the direct influence, foundation reinforcement would be minimized. First above all, two more floors of extension in then stories high building would be checked without unpractical foundation reinforcement by lightening finishing loads and partition walls. Merely, in case of the increasing earthquake force or three more stories of extension, foundation reinforcement should be inevitable. Especially, in case of pile foundation, engineering test should come before and experiments and theoretical study must be continued in order to reinforce reasonably.
Thirdly, design of remodeling and the process of construction are as follows. Because remodeling construction is different from the new construction, then new criteria and new method of construction is going on the development for the aseismatic reinforcement and general structural reinforcement method. For these, checking and identification about the structural safety from design to construction should be done throughly. So, at the time of designing, an organization of consultation like structural safety technology committee should be established and should be checked the propriety of design about the horizontal and vertical extension. At the time of construction, safe remodeling should be possible with the participation of structural specialists for the technical consultation or career management.
At conclusion, remodeling is on the opening stage. Until now, the most rational and safe construction should be gotten with fully mobilization with the use of the accumulated structural engineering technology and the part of new engineering judgment. In that sense, engineering method should be secured according to the raising of preciseness in aseismatic performance evaluation and ensuring of the certainty validation about construction. Successive remodeling business should be followed by all examinations about these all actions systematically after composing of acting system.