Damage Simulation Analysis On Partial Frame Supported Shear Wall Structure And Performance Study On Conversion Beam Component

In general, the key point to protect partial frame supported shear wall structure from collapsing is to ensure safety of transfer beams. It has significance to study the transfer beams component when conducting researches on this type of structure suffered from seismic. Character of bearing shear walls made the loading features of transfer beams are different from usual framed beams or coupling beams. The generally used beam-shell elements model cannot precisely simulate the damage features of transfer beams suffered from seismic. By using 3D solid elements this problem can be solved through present detailed loading features of transfer beams. Because a model built by solid element has a huge amount in numbers of element and the computing device and time is limited, so the substructure technic could be used for reduce of computing cost. Works in this paper have done are mainly contained in the following points.Referred to a partial frame supported shear wall structure with transfer beams to create a 40 meters high building finite element model whose transfer beams are at the second floor. With the aid of general finite element analysis software ABAQUS, simulation of the structure suffering frequent seismic action is done. Results such as inter-story drift, vertex displacement and base shear is extracted to compare with limit value of codes to decide that design of the structure is reasonable.Comparison of displacement and stress between global model and sub-model are in good agreement with each other, indicate that sub-model technique is applicable for structure which has partial higher precision requirement.Calculation for global model suffering severe seismic is done by using concrete damage plasticity model. Displacements of drive nodes are set as boundary conditions for sub-model to calculate results such as damage, component yielding and strain of shear walls in bottom reinforced area and transfer beams. Use multiple data results to make judgement for structure safety under severe seismic.Use sub-model technology to analyze transfer beams' mechanical performance under fortification intensity severe seismic to summarize their regular damage patterns. On the basis of sub-model technique, collapse of transfer beams under beyond fortification intensity severe seismic are simulated to summarize their regular collapse patterns.Innovation points of this paper are:(1) Applied the sub-model technique to the elastic seismic time-history response analysis of partial frame-supported shear wall with transfer beam structure to compare the results of elastic response analysis between global model and sub-model to prove the feasibility of sub-model.(2) Use solid elements instead of beam elements to simulate the transfer beams to take shear deformation which caused by its large cross section into consideration. Based on the sub-model structure to conduct a research on the mechanical characteristics of the partial frame-supported shear wall structure's transfer beams under severe seismic.(3) On the basis of sub-model structure, adopted concrete's damage plasticity to conduct a damage analysis on transfer beams in the partial frame-supported shear wall structure under beyond fortification intensity severe seismic to explore their damage laws.