Abstract:The tunnel lining systems act as lines of defenceagainst the forces and geotechnical situations. The use ofprecast concrete tunnel linings (PCTLs) has been escalat-ing due to its effective and economical installation process.The tunnels usually suffer from the premature deteriora-tion due to corrosion of the reinforcement and thus needmaintenance. Corrosion leads to the distress in PCTL lead-ing to the cracking and finally the scaling of concrete. Thisstudy aims to assess the structural durability performanceof reactive powder concrete (RPC) as the material of tunnellining segments compared to reinforced concrete (RC) andhigh performance concrete (HPC). The numerical findingsindicated that the maximum load capacity of PRC-PCTL seg-ments was greater than that of the corresponding RC andHPC segments. Regarding the findings, PRC is a very signif-icant option for conventional segments. The high strengthof PRC can decrease the thickness of the PCTL segments,resulting in the decreased material cost. Also, PRC-PCTLsegments can eliminate the laborious and costly produc-tion of RC segments and mitigate the corrosion damage andthus enhance the service life of lining segments.

As the world business enlarging day by day, and designing of the buildings are getting complex and demanding more technology to enhance its stability, performances, cost, duration and its uniqueness of designing. At the later part of development in civil engineer majority of the work was transformed from conventional system to a well organized and computerized system, most of the time the company employees and owners were in live risk, due to non availability of technology. As time goes technology develops, having this in mind we had also suggested using Etabs software in our design. Etabs is a 3D analysis and designing of the buildings, it is engineering software which is used in construction and designing or analysis of complex multi stored buildings. Composite column is actually the amalgamation of two traditionally methodologies structure steel and structure concrete, their design could be based on concrete or steel methodology. Any method can be used to develop composite column approach. Composite columns are designed by applying different components of structure steel and concrete in according to use the advantages and property of each material. The outer and inner behavior of the concrete and structural steel ingredients make the Composite column is very unbending, enough squashy, cost effective and generally makes it efficient partner of the building and bride constructions. Normally three kinds of composite column sections are using in high risky building construction. The building was analyzed by using Etabs and designed according to the needed requirement. Composite column technology for construction of building is now a day’s very popular and has more advantages over the conventional designing of buildings, currently we see tall buildings with great advantages such as less space more accommodation, parking, and many more, these all can only be achieved if we implement the concept and idea of composite construction. This is why composite construction is so good; the one line reason behind this is that it combines both steel and concrete into one unit. By combining these materials can strengthen and provide best result in extremely enough and light weight design. Composite by column can also save our time and we can construction the complex buildings in short term. One of the biggest achievement if is done in construction by composite column is the cost reduction, because most of the constructions companies are being lost and dropped its position due to non profitability.