非韌性鋼筋混凝土構造建築物之包覆FRP梁柱構材塑鉸性質推算及耐震能力評估方法研究

Modeling Parameters for Nonlinear Behavior of Members with FRP and the Seismic Evaluation of Non-ductile Reinforced Concrete Buildings

羅太郎(Tai-Lang Lo)

指導教授 ： 林炳昌

中原大學/工學院/土木工程學系/碩士(2007年)

https://doi.org/10.6840/cycu200700660

摘要

摘 要

建築物的耐震能力與其構材之韌性能力有關，然而許多老舊建築
物由於可能當初設計時耐震設計不夠完善，或者施工不當，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L、梁柱接頭區無剪力鋼筋、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足等缺失，導致構材韌性或強度不足而容易發生脆性破壞。
　　FRP包覆混凝土構件為補強構件韌性不足或強度不足的方法之ㄧ，本文利用包覆FRP混凝土組成律關係，推求梁柱構材混凝土極限應變及推算梁、柱構材之塑性旋轉角值，進而模擬梁柱構材之塑性行為。將推算之塑鉸參數值代入ETABS程式中，以靜力非線性推覆分析方法，求得建築物容量曲線並經由容量譜法求得需求譜與容量譜的性能點，推估老舊建築物補強後之耐震能力。

關鍵字

耐震能力 ； 韌性 ； 構材塑鉸性質 ； 推覆分析 ； FRP

並列摘要

ABSTRACT
Seismic capacities of buildings are based on the ductile ability of members. However many old buildings were lacked of seismic design concept in initially design or did not follow the requirements of building code in the construction. Then caused to non-ductile of members, such as transverse reinforcement spacing was too large in the plastic hinge region of members, or transverse reinforcement with 90° hook, or beam-column joint zone lack of shear reinforcement, or spliced reinforcement or anchorage length not enough, or concrete quality poor or cover not enough for the reinforcement etc.
Concrete members retrofitted with FRP are the one of ways to enforce its ductile ability or strength. This study is to simulate the nonlinear behavior of members, based on concrete constitutive laws with FRP, to calculate concrete maximum strain and the plastic hinge rotation of members. In the meanwhile, the capacity curvature of buildings is obtained by the procedure of nonlinear pushover analysis of ETABS. Furthermore, we can estimate for the seismic evaluation of old buildings after retrofitted by the FRP by the method of capacity spectrum to obtain intersection point of the demand spectrum.

並列關鍵字

Plastic hinge property ； Pushover analysis ； FRP ； Seismic evaluation ； Ductility

參考文獻

參考文獻

1. Park R. and T. Paulay, “Reinforced concrete structures,” Department of civil

engineering, University of Canterbury, christchurch, New Zealand.

2. Colery W. G., “Rotational capacity of reinforced concrete beams,” Journal of the

Structural Division, ASCE, Vol.92, ST5, October 1966, pp. 121-146.