Proposal for seismic performance of high-rise buildings under long period ground motion taking fracture of connections

2014 Fiscal Year Final Research Report

• Project/Area Number: 24760448
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Building structures/materials
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: MATSUI Ryota 東京工業大学, 理工学研究科, 助教 (00624397)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 梁端接合部 / ブレース / 接合部破断 / 部材破断 / 耐震性能 / 累積変形性能 / エネルギー吸収性能 / フラジリティ曲線

Outline of Final Research Achievements

In this research, the cumulative deformation capacity of the end of the beam was investigated on the basis of the experimental and numerical data, and an evaluation method for assessing the ultimate state of the high-rise buildings under long period ground motion was proposed. Additionally the lateral bracing requirements for H-section beams under cyclic loading was examined by experiments and numerical analysis. To expand the proposed evaluation method, the cumulative deformation capacity of the circular hollow section T-joints was investigated by experiments and finite element analysis. The seismic performance of buildings under severe ground motion in a range of the dominant natural period of the buildings was examined, using the time history analysis program including fracture of the braces and connections. This analysis results also provide a fragility curve of the buildings including the connection fracture effect.

Free Research Field

耐震構造