非韌性鋼筋混凝土構造建築物之 梁柱構件塑鉸性質推算及耐震能力評估

Modeling parameters for Nonlinear Behaviour of Members and Seismic Evaluation of non-ductile Reinforced Concrete Buildings

王力行(Lee-Hsing Wang)

指導教授 ： 林炳昌

中原大學/工學院/土木工程研究所/碩士(2005年)

https://doi.org/10.6840/cycu200500495

摘要

建築物的耐震能力與其構件之韌性能力有關，然而許多老舊建築物由於當初設計時缺乏耐震設計觀念，或者現場施工不當，造成構件韌性能力不佳，例如梁柱構材端部塑鉸區箍筋間距太寬、箍筋為90度彎勾、梁柱接頭區無剪力筋、主筋搭接或錨定長度不足、混凝土品質低落或混凝土保護層厚度不夠等缺失，以致構材韌性或強度不足而容易發生脆性破壞。
　　本文利用鋼筋混凝土梁柱構材之混凝土極限應變及塑鉸長度之經驗公式，推算梁、柱構材之塑性旋轉角值，進而模擬梁柱構材之塑性行為。同時利用SAP2000之非線性推覆分析方法，求建築物容量曲線並經由ATC-40所建議之容量譜法求得需求譜與容量譜的交點，推估老舊建築物之耐震能力。

關鍵字

推覆分析 ； ATC-40 ； 構材塑鉸性質 ； 韌性 ； 耐震能力

並列摘要

Seismic capacity of buildings is based on the ductile ability of members, however many old buildings was lacked of seismic design concept in initial design or non-correct construction in the field which was caused to non-ducile of members. For examples, it was the defect such as that transverse reinforcement spacing was too large in the plastic hinge region of members ,or transverse reinforcement was 90° hook ,or beam-column connection was lack of shear reinforcement ,or longitudinal reinforcement was spliced ,or anchorage length was not enough and concrete quality was poor and cover was not enough etc.
This study based on concrete maximum strain of reinforced concrete members and experienced formula of plastic length , calculates the plastic hinge rotation of members and simulates the plastic behaviour of members.
Therefore, the capacity curvature of buildings by the procedure of nonlinear pushover analysis of SAP2000 is gained and an intersection point of the demand spectrum and the capacity spectrum by ATC-40 suggested method is estimated for the sismic evaluation of old buildings.

並列關鍵字

seismic evaluation ； Ductility ； ATC-40 ； plastic hinge property ； pushover analysis

參考文獻

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