受压弦杆内填混凝土能很好地协助钢管受力、减小钢管应变，提高受压节点的强度和刚度；
The concrete-filled in compression chord can help compression chord members very well, and reduce the steel tube strain;
研究表明，无论支弦杆受拉或受压，随主弦杆拉力的增加，节点承载力逐渐降低。
The results show that the bearing capacity decreases gradually with the tension of chord increasing.
研究表明，无论支弦杆受拉或受压，随主弦杆拉力的增加，节点承载力逐渐降低。
The results show that the bearing capacity decreases gradually with the tension of chord increasing.
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