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（北京市城市規(guī)劃設(shè)計(jì)研究院，　北京 100045）

［摘要］在張弦桁架結(jié)構(gòu)中，索夾節(jié)點(diǎn)是保證拉索與主體鋼結(jié)構(gòu)之間協(xié)同工作的關(guān)鍵部分。以內(nèi)蒙某工程為背景，對(duì)解決模擬索體柔性特征的方法進(jìn)行了研究，并對(duì)索夾節(jié)點(diǎn)進(jìn)行了ABAQUS有限元分析，提出了靜力狀態(tài)下傳統(tǒng)索夾節(jié)點(diǎn)受力性能方面的不足，并對(duì)其受力性能優(yōu)化設(shè)計(jì)方法進(jìn)行了研究，分別針對(duì)索夾邊緣倒角以及索夾與索體間的鋁墊層對(duì)于索夾節(jié)點(diǎn)受力性能的影響進(jìn)行了參數(shù)化分析。分析結(jié)果表明，使用幾何構(gòu)造優(yōu)化與鋁墊層優(yōu)化兩種優(yōu)化措施對(duì)于索夾節(jié)點(diǎn)受力性能優(yōu)化效果明顯。倒角的尺寸在1/4～2/5拉索直徑范圍內(nèi)時(shí)優(yōu)化效果較好，拉索表面最大等效應(yīng)力降低8%～11%；鋁墊層厚度在1-0～2-5mm范圍內(nèi)時(shí)優(yōu)化效果較好，拉索表面最大等效應(yīng)力降低17%～19%；兩種措施同時(shí)使用優(yōu)化效果更佳，優(yōu)化效果優(yōu)于分別單獨(dú)使用任何一種優(yōu)化措施。

［關(guān)鍵詞］張弦桁架； 索夾節(jié)點(diǎn)； ABAQUS； 受力性能優(yōu)化； 倒角； 鋁墊層

中圖分類號(hào)：TU393-3文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)02-0086-06

Research on mechanical performance and optimization design method of truss string cable clamp joint

Chen Ziyi

(Beijing Municipal Institute of City Planning & Design, Beijing 100045, China)

Abstract:In the string truss structure, the cable clamp joint is a key part of ensuring the cooperative working between the cable and the main steel structure. Based on a project in Inner Mongolia, the method was studied to solve the flexible characteristics of the simulated cable body and ABAQUS finite element analysis was performed on the cable clamped joints. The insufficiency of the mechanical performance of traditional cable clamp joints under static state was proposed, and the mechanical performance optimization design method was studied. The parametric analysis of the influence of the cable clamp edge chamfer and the aluminum cushion between the cable clamp and the cable body on the force behavior of the cable clamp joints was carried out. Analysis results show that the optimization of the mechanical properties of the cable clamp joints is significantly improved by two optimization measures: geometric structure optimization and aluminum cushion optimization. If the chamfer size ranges between 1/4~2/5 of the cable diameter, the optimization effect is better, and the maximum equivalent stress of the cable surface is reduced by 8%~11%. If the thickness of the aluminum cushion ranges between 1-0~2-5mm, the optimization effect is better, and the maximum equivalent stress of the cable surface is reduced by 17%~19%. It has better optimization effect when the two measures are used at the same time and the optimization effect is better than any single optimization measure separately.

Keywords:truss string; cable clamp joint; ABAQUS; mechanical performance optimization; chamfer; aluminum cushion

*國(guó)家自然科學(xué)基金項(xiàng)目（51578046）。

作者簡(jiǎn)介：陳子毅，碩士，高級(jí)工程師，Email: 61253333@qq.com。