受剪混凝土柱之單軸循環桁架模型

Abstract

本論文開發一單軸循環桁架模型用以預測鋼筋混凝土柱承受循環剪力之實際行為。經由應用物件導向程式設計，使用者可輕鬆將本模型與現有撓曲分析程式碼結合用以分析鋼筋混凝土柱承受軸力、撓曲、剪力時的複雜行為。單軸循環桁架模型分析結果將會反覆載重實驗結果比對結果成功預測破壞模式與遲滯行為。除此之外，本研究另開發一簡易預測模式用以直接快速預測鋼筋混凝土柱的破壞模式。此模式估測鋼筋混凝土柱的剪力容量並將之與側推分析得到的撓曲容量比較藉以決定其破壞模式。

A uniaxial cyclic truss model (UCTM) is developed to simulate the hysteretic behavior of reinforced concrete columns under cyclic shear. Object-oriented programming methods are used to combine the proposed UCTM easily with any other developed flexural analysis methods to predict the response of RC columns under axial-flexural-shear loading. Analytical results obtained using UCTM are compared with the test result of reinforced concrete column specimens subjected to cyclic loading. It is shown that the UCTM can successfully predict the failure mode of a reinforced concrete column. Hysteretic relationships in UCTM can agree satisfactorily with experimental data. This thesis also proposes a simplified procedure to predict the failure mode of RC columns rapidly. The procedure is to evaluate the nominal shear strength of an RC column by UCTM and compares it to its peak lateral force that is obtained from pushover analysis, and thereby determines its failure mode.