I feel the development of new construction material with low cost is always welcome issue in civil engineering construction. In terms of structural research, the post peak response of the structure is very important. As, today any natural and man made disturbance is very common. The stability of the structure due to these causes are important in today scenario. So, new research can start in these areas and also soil structure interaction kind of research..all the best in your research..
There is growing pressure on the construction industry to become a sustainable and efficient sector in the use of natural resources and its impact on the environment. Structural engineers, working with architects, can help by delivering sustainable design solution and using materials with low carbon footprint. These are areas where more effort needs to be focused.
Merihun Tafesse, that's a very general question and as you can see, it has a lot of different answers, and those are all correct. To sum up, the latest research topics on structural civil engineering are most related to reduce the cost and the environmental impact of the structure. In this general observation, you can find topics related to design optimization, new design procedures, consideration of new types of loads (seismic, fire behavior, wind, and more), new types of materials and more. Basically, everything that aims the reduction of cost and environmental impact, makes a great topic. I hope i could help you.
In my opinion, "the effects of pounding and soil-structure interaction on the nonlinear dynamic behavior of adjenct building" subject is most promising.
Globally, it is on thin laminated composite and their strength optimization. Locally, one can check what can benefit his or her country most and research on those area.