高強度鋼筋混凝土柱之設計

DESIGN OF HIGH-STRENGTH REINFORCED CONCRETE COLUMNS

歐昱辰(Yu-Chen Ou) ； 蔡東均(Tung-Chun Tsai)

《中國土木水利工程學刊》 30卷3期 (2018/09) Pp. 223-229

https://doi.org/10.6652/JoCICHE.201809_30(3).0006

摘要

採本文介紹高強度鋼筋混凝土柱的設計規定，所涵蓋的混凝土抗壓強度不超過100 MPa（1000 kgf/cm^2），縱向鋼筋降伏強度不超過690 MPa（7000 kgf/cm^2），橫向鋼筋降伏強度不超過790 MPa（8000 kgf/cm^2）。規定內容包括適用範圍、軸力與撓曲強度、剪力強度與圍束作用四個部分。與現行混凝土結構設計規範相較，本文高強度鋼筋混凝土柱的設計規定有以下主要之不同：（1）彎矩強度計算所需等值應力塊應力大小之變更；（2）軸力強度計算所用混凝土強度之變更以及受壓鋼筋應力上限之規定；（3）計算鋼筋剪力強度所用鋼筋降伏強度上限之提升；（4）混凝土剪力強度詳細式上限之修正；（5）最少剪力鋼筋量之修正；（6）剪力設計所需之最大可能彎矩強度之變更；（7）圍束鋼筋設計關於軸力、彎鉤有效性以及混凝土強度之修正，以及圍束設計鋼筋降伏強度上限之提升。

關鍵字

柱 ； 高強度鋼筋混凝土 ； 軸力 ； 撓曲 ； 剪力 ； 圍束

並列摘要

The design provisions of high-strength reinforced concrete columns are presented. The high strength is defined for concrete to have compressive strength not exceeding 100 MPa (1000 kgf/cm^2), for longitudinal reinforcement to have yield strength not exceeding 690 MPa (7000 kgf/cm^2), and for transverse reinforcement to have yield strength not exceeding 790 MPa (8000 kgf/cm^2). The design provisions presented include scope, axial and flexural strengths, shear strength, and confinement design. Compared with the existing reinforced concrete code, the provisions differ in the following aspects: (1) the equivalent stress block for flexural strength; (2) the concrete compressive strength limit and stress limit of compression reinforcement for axial strength; (3) the upper limit of yield strength of shear reinforcement for shear strength; (4) the upper bound detailed shear strength equation; (5) the minimum shear reinforcement; (6) the maximum probable moment strength for shear design; (7) the amount and details of confinement reinforcement to consider the effects of axial load, effectiveness of hooks, and concrete compressive strength and the upper limit of yield strength of confinement reinforcement.

並列關鍵字

columns ； high-strength reinforced concrete ； axial load ； moment ； shear ； confinement