Please use this identifier to cite or link to this item:
|Other Titles: ||A study on seismic capacity evaluation of performance-based method for reinforced concrete buildings|
|Authors: ||施明媛;Shih, Ming-yuan|
|Keywords: ||功能性耐震能力評估法;耐震能力評估;容量震譜;耐震能力;耐震;Seismic capacity evaluation;Performance-Based method;Seismic Capacity|
|Issue Date: ||2010-01-11 05:27:34 (UTC+8)|
本文以功能性耐震能力評估法評估既存建築物之耐震能力，考慮到結構物構材韌性能力的不同，而逐漸發生破壞的行為，且利用ATC-40容量震譜法評估建物於不同破壞行為下之地表加速度，並給予概念式之定性描述；因採用側推分析(Push Over Analysis)方法評估建物耐震能力，故既有建物之軟層、弱層、平立面不規則等特性皆能反應於結構分析之中；另結構體因為長期使用而產生裂縫、變形、老化等缺陷，這些結構缺陷對於建築物的耐震能力會有一定程度的影響，也應該反應於耐震能力評估之中。
The methods about the seismic capacity evaluation method for structures are generally used by the ETABS structure software to check strength and by the detail evaluation of seismic capacity method mainly analyzed by ductility and strength. The evaluation method checked by strength is difficult to state accurately the real characteristics of the nonlinear behaviors of structures, and it is no concrete and objective standards. The most important problem of the detail evaluation of seismic capacity method is the building structure that members are not suffered from destruction at the same time but are gradually destroyed under seismic force, and Moreover, the seismic capacity of the mixing buildings for reinforced building, steel construction building, and steel reinforced building are not able to be correctly evaluated.
Evaluated by the seismic capacity evaluation of performance-based method, it is applied to seismic capacity of the existing building that the structure members of difference ductility capacity and the behaviors that failures happen gradually are considered in the paper. The ground accelerations under different failures are evaluated by utilizing ATC-40 capacity spectrum method, and the paper offers damage control and building performance levels. Because using pushover analysis to evaluate the seismic capacity of buildings, the method can react to soft story, weak story, and layout and elevation irregular etc. in the structure analysis. Because of the long time using, such defects as cracks, deformations, aging etc. take place on the structure. The paper here producse a certain degree of reacting on the building while evaluated in seismic capacity evaluation.
The paper regards two buildings as the analysis cases. One case is RC building, and the other case is mixing building of SC and RC. The analysis result is discussed as following.
1.The case two is on the influence of life, and then collapse ground acceleration Ac can be reduced to 0.89Ac again.
2.The ratio of collapse ground acceleration is among 1.3~1.8 times under ductility used up and allowable ductility capacity. It shows the detail evaluation of seismic capacity enlarged by 1.3~1.8 times again.
3.The period shall be changed progressively with forming hinges of the structure members from yielding point to collapse point about 1.1~1.3 times according to analysis result of the case.
4. It is the second story to collapse shown by the analysis result, but SC story is not considered in the detail evaluation of seismic capacity method. It is the fourth story to collapse shown by the seismic capacity evaluation of performance-based method. The main reason is that the detail evaluation of seismic capacity is only suitable for RC building but the seismic capacity evaluation of performance-based method shall be suitable for mixing building.
|Appears in Collections:||[建築學系暨研究所] 學位論文|
All items in 機構典藏 are protected by copyright, with all rights reserved.