This study aims at the structural evaluation of the elevated concrete water tank condition, including crack initiation, through nondestructive testing. The growing demands for environmental quality have resulted in a rise in the design and construction of tanks and reservoirs in the construction industry. Cracks for water line leakage were found during watertight testing in concrete tanks. Long-term liquid leaking may permanently damage the tank and can contaminate the groundwater. Given the critical existence of leaked cracks in tank serviceability and durability, the contribution examines the triggers and effects of their occurrence. An inspection of the existing water tank system is conducted to ascertain its condition. The investigation included structural design checks, concrete compressive strength tests, visual assessments, hammer inspections, and Ultrasonic Pulse Velocity (UPV) testing with Portable Ultrasonic Non-Destructive Digital Indicating Tester (PUNDIT). This observation is made at many elevations on various sampling points on the tank structure's elements, including columns, beams, tank floor slabs, and tank wall shells. The results indicate the presence of flexural type cracks in the main beam's middle span and diagonal beams. Additionally, cracks attributed to long-term drying shrinkage were discovered on the diagonal of the floor slab and cracks of the same pattern on the main beam's middle span. The deflection estimated by structural remodeling was larger than the deflection estimated by design. The computed crack width in the main and diagonal beam exceeds the acceptable crack width.
The rapid development of information technology provides lots of benefits for construction. In several construction works, related to various scientific disciplines, there are often inefficiency and ineffectiveness during the process of planning and project implementation. Thus, we need a certain technology as a solution for the more efficient and integrated building planning, which is Building Information Modeling (BIM). One of the BIM-based software that is able to analyze the structures and the detailing structural elements is called Tekla Structural Designer 2019 and Tekla Structures 2020. The purpose of this study is to find out the result of analysis and the design of roof structural elements, slabs, beams, columns, stairs, bored pile foundations, pile caps, and tie beams in the 4-storey Building Structures of Co-working space Soekarno Hatta Malang City based on Building Information Modeling (BIM). The data needed was the dead load data, live load, wind load, earthquake load, technical drawings, and soil data. The analysis and the design of reinforced concrete structural elements based on the Tekla Structural Designer 2019 and rebar detailing using the Tekla Structures 2020. From the calculation data, the result obtained for the seismic base shear force of 1673 kN. The structures of the roof, slabs, beams, stairs, and tie beams using fc’ 25 MPa quality concrete. Columns structure, bored pile foundations, and pile caps using quality concrete fc’ 30 MPa. The quality of reinforcing steel for all concrete structural elements using fy 400 MPa
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