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试验表明,现行钢筋轻骨料混凝土结构设计规程(JGJ12-82)不能准确计算浮石混凝土偏心受压构件的承载能力.本文在充分考虑浮石混凝土的特性后,给出了弯曲抗压强度R_w和受压区计算高度x.并根据平面假定导出了在大、小偏心界限处极限荷载下受压区高度x_i的计算公式,以及在小偏心荷载下受拉边(或压应力较小边)钢筋应力的计算公式,提出了新的计算公式和设计步骤,从而可以只用平衡方程就能计算大、小偏心受压浮石混凝土构件的承载能力. 本文可供设计和修订规范参考.
The tests show that the current design rules for reinforced concrete lightweight aggregate structures (JGJ12-82) cannot accurately calculate the bearing capacity of eccentric concrete compression members. In this paper, considering the characteristics of pumice concrete, the bending compressive strength R_w and the The nip calculates the height x. Based on the plane hypothesis, the calculation formula for the height x_i of the compression zone under the extreme loads at the large and small eccentric limits is derived, and the stress of the steel bars under the small eccentric load (or the smaller side of the compressive stress) is derived. The calculation formulas of the new formulas and design steps are proposed, so that the bearing capacity of large and small eccentric compressed pumice concrete members can be calculated by using only the balance equation. This article can be used to design and revise the normative references.