In this paper the influence of the tension constraint on the performance of composite columns is analyzed focus-ing on the L shaped column composed of binding bars with different types and different strength by numerical simulation , the results were compared with test results .The results show that the effect of the tension constraint on the performance improvement of the L shaped composite column could be derived from this method as well as the positive effect on the col-umn ductility and bearing capacity . Finally the theoretical calculation method based on the linear regression analysis shows high consistency with the numerical results ,and the calculation formula of the bearing capacity of the composite special-shaped columns with the constraint of the tie rod was developed .%为研究对拉约束拉杆对组合柱性能的影响,针对L形组合异形柱设置不同类型的约束拉杆、不同强度材料等进行数值模拟,对比该类型下的相应试验结果,分析验证了对拉约束拉杆对L形组合异形柱的性能改善作用,得到了对拉约束在柱延性及承载力方面的积极影响效果.最后基于线性回归分析的理论计算方法表现出了和数值结果较高的一致性,建立了具有较高参考价值的带约束拉杆的组合异形柱承载力计算公式.
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