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This paper presents an experimental study about the effects of damage on modal parameters of haunch strengthened composite column–steel beam connections. Five specimens having various composite column and steel beam connection details were constructed in order to be examined in laboratory condition. Non-destructive experimental measurements were conducted to extract the modal parameters using frequency and time domain methods before and after damage conditions. Quasi-static cyclic tests were performed to assess the damaged conditions in connection zones of the test specimens. At the end of the study, it is observed distinctly that there is a decreasing trend in natural frequencies with damages. Also, no compliance is observed between mode shapes pre- and post-cycling loading tests. The biggest dissimilarities concerning natural frequencies were determined among 26.57% and 36.54%. The value for modal assurance criterion was 1.0 for undamaged condition. However, in post-damaged situation, the mode shapes have changed and modal assurance criterion values nearly approached zero. Finally, experimentally obtained damping ratios have been analyzed. The outcome of the study has shown some dissimilarity and that the values are not being correlated constructively. Despite the fact that the results are consistent with the available literature, it is assumed that these dissimilarities point to the fact that higher levels of excitation might be need to precisely record the damping ratios.

Especially after the 1980s, computer-aided design programs paved the way for the implementation of unusual forms and building structures in the construction industry. This situation has increased the necessity of process management and the development of existing systems in the field of construction project management has become a necessity. As a result of these developments, the concept of integrated project delivery (IPD), which aims to increase the coordination, cooperation, and communication among the team members of different disciplines, has emerged. In addition to the coordinated work of the design team; project stakeholders such as customers, contractors, and subcontractors are also directly involved in the process. In such large-scale projects, the concept of the Great Chamber, an integrated project delivery system, emerged as a collaboration platform in project management. As a result of the search for process management, the Big Room concept, which aims to increase the coordination, cooperation and communication among the team members of different disciplines, is a physical space organization that uses technology but has central human and human relations. Big Room is a design and coordination office located on the construction sites. In this office, all stakeholders are involved early on and are directly involved in the management and control of a project. Team members work together to improve team performance, interact and accelerate decisionmaking and reduce project costs for better communication. In this study, it is aimed to introduce, search and determine the advantages of Big Room concept which is used in many big projects in the world by searching literature.

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