本研究旨在探討梁柱接頭的剪力破壞對於耐震能力評估所造成的差異,由於老舊建築物箍筋量配置不足是蠻常見的問題,經過幾次的地震中,常可發現結構物因接頭強度不足而剪力破壞的情況,因其梁之塑鉸無法完全發揮甚至無法產生塑鉸,造成結構物的耐震能力不佳,提早破壞。 經過分析之後發現共有六種情況,本論文是把接頭的變形加入梁的M3塑鉸之中,於第三章中詳述各種情況的設定方法;並於第四章介紹本次分析所使用的構架以及桿件的分析和設計流程與結果,最後於第五章說明分析結果並於第六章說明結論。 經過分析之後發現,接頭強度不足所造成的影響是非常顯著的,一旦接頭箍筋量配置不足,結構物的韌性不佳,耐震能力差,而偏心與否也是一個重要的因素,但如果梁寬與柱寬相差不會很多時,相對的偏心與否就不是主要的因素。
This study emphasizes establishing the capacity spectrum of a structure using by pushover analysis. We use the SAP2000 nonlinear version to execute pushover analysis. We consider the shear failure of beam-column joint, and add the joint deformation into M3 hinge. Then put the M3 hinge in the beam to simulate the shear deformation of beam-column joint and the deformation of beam. We find six category failure of the interaction between joint and beam. The plastic rotation value is the suggestion of FEMA-273. We develop the method to setting M3 hinge. To demonstrate the process above, we evaluate seismic capacity of a building. Engineers can apply this method on other kinds of structures as well.