【正文】 racks, and the second one after the concrete cracks (Razaqpur et al. 2021). Therefore, there is no need for calculating curvature at different sections along the length of the beam as for steel reinforced concrete. There are only three pairs of moments with corresponding curvature that define the entire moment–curvature diagram: at cracking, immediately after cracking, and at ultimate. With this in mind, simple formulas were derived for deflection calculation of simply supported FRP reinforced beams and are used in CSA S80602 (CSA 2021). The deflection due to fourpoint bending can be found using the following equation: ???????? ???????????????? ???? 2322m a x 184324 aMMIIaLIEPaacrgcrcrc? （ 13） Verification of Proposed Methods The nine methods of deflection calculation presented in this paper were used to analyze 197 simply supported beams and slabs tested by other investigators. Material and geometric properties of the beams used in this investigation could not be published due to the extent of the statistical sample but can be found in Mota (2021). Table 1 shows the range of some of the important properties of the members in the database. All information used in the analysis, such as cracking moment and modulus of elasticity of concrete, was calculated using CSA (CSA 1998)based on input given by researchers. To check the accuracy of formulas developed by other investigators, a statistical analysis has been performed on each of the equations paring the calculated deflection to the experimental deflection at several given load levels. It must be noted that the deflection is typically only checked at the service load level. However, since the service load criteria is only explicitly stated in the ISIS M0301 (Rizkalla and Mufti 2021), it is unclear at this point what the service load level for each code is. Thus, a statistical analysis was carried out at both low loads and at elevated loads to enpass the entire load–deflection curve, as well as at the service level given by ISIS M0301 （ Rizkalla and Mufti 2021） . This will allow the designers to choose an accurate formula, based on the results of the analysis, at the load level which most closely resembles their service load criteria. The statistical analysis was performed by applying a log transformation to the ratios of the experimental to calculated deflection ratios. A log transformation was employed to give equal weight to those ratios which were below one and those which were above one. When considering longterm deflection, perhaps only the accuracy of shortterm deflection equation is required since this number will be further modified by other coefficients. However, since only shortterm deflection has been considered here, the predicted deflection should be also consistently conservative. Journal of Composites for Construction, Vol. 10, , June 1, 2021. 169。本文分析的目的是確定 FRPRC構(gòu)件撓度的計(jì)算方法 ,也是確定最適用的可靠性的準(zhǔn)則。除了優(yōu)越的耐用性 ,FRP鋼筋強(qiáng)度遠(yuǎn)高于 傳統(tǒng)的低碳鋼。這個過程需要一個適用于整個梁長的慣性矩計(jì)算 ,并使用由線性彈性分析所得的撓度方程。布朗和巴塞洛繆 1996。它建議今后使用進(jìn)行修改過的有效慣性矩方程，如下所示 : ? ?gcrTacrcrcrTe IIIMMIIII ????????????????????? 2 （ 6） TI =未破壞截面處的慣性矩 方程式（ 6）取自 CEBFIP MC90（ CEBFIP 1990）加利等（ 2021）。在負(fù)載情況下，當(dāng)彎矩 曲率圖已知 ,虛擬的工作法可以用來計(jì)算結(jié)構(gòu)構(gòu)件的撓度 dxEIMmL?? 0? （ 11） L=簡支節(jié)的長度； M/EI=截面曲率； m =質(zhì)量