高強度鋼筋混凝土梁撓曲與剪力設計參數之探討

DESIGN PARAMETERS FOR HIGH-STRENGTH REINFORCED CONCRETE BEAMS

10.6652/JoCICHE.201809_30(3).0001

王勇智(Yung-Chih Wang)；周延(Yen Chou)；鄭敏元(Min-Yuan Cheng)；林克強(Ker-Chun Lin)；洪立彥(Li-Yan Hong)；何立文(Li-Wen Ho)

耐震設計 ； 高強度鋼筋混凝土（New RC） ； 撓曲強度 ； 剪力強度 ； seismic design ； high-strength reinforced concrete (New RC) ； flexural strength ； shear strength

中國土木水利工程學刊

30卷3期（2018 / 09 / 01）

163 - 170

繁體中文

近年來，國內推行高強度鋼筋混凝土（New RC）結構系統研發，其中所用SD 690鋼筋超過現行規範ACI 318-14 SD 420鋼筋限制，許多經驗公式之規定值無法適用。因此，本文將研究此類新型鋼筋混凝土梁之耐震設計，以計算撓曲強度及剪力強度等相關係數為探討重點。研究結果顯示，New RC梁之撓曲強度與剪力強度設計方式，大部分與ACI 318-14規範耐震設計規定相近；唯矩形應力塊修正係數、斷面強度折減係數、防主筋挫曲之橫向箍筋間距限制、最大可能彎矩、計算梁剪力之最大橫向鋼筋應力限制等，均不同於ACI 318-14之規定值。

The purpose of the study is to propose the design guidelines for flexural and shear strengths of high-strength reinforced concrete (so called as New RC) beams. It concluded that the flexural and shear design methods are similar to the seismic specification of the RC design provisions ACI 318-14. However, the specified coefficients of the New RC beams are different from the coefficients provided in the ACI 318-14, which are the factors for the rectangular stress block, flexural strength reduction, anti-buckling spacing of the compressive reinforcement, the probable flexural strength of beams, and the yield strength limit of lateral hoops.

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