【正文】 NSYS (2021). It has a 150m span, and the radius of the inner ring is 30m. Product 2 listed in the Table 1 is employed in this structure, which is assumed to have a design value of 2021 Map for the tensile strength. Only the radiated pattern is adopted. There are 360 repeated sets altogether, each of which is posed of three strips. Thus, there are 1,080 FRP strips in the structure. The geometric nonlinearity from large deformation was considered in the finite element analysis, while interaction between strips was neglected. The self weight of the FRP web is ignored as it is only 177kN which is much smaller the total load acting on the structure. The stress level in the initial prestressed web is controlled to be no more than 210MPa, while that after the downward movement of the inner ring beam 設計巴巴工作室 no more than 1000 Map. From the finite element analysis, under a vertical force of 14,400 ken for the second stage operation, the inner ring beam moves down by m and the maximum stress in the strips reaches 995MPa. The construction of the FRPWWS is now plete. As the weight of each strip in this FRPWWS is less than 18kg, which can be carried by an adult, the construction of this structure is expected to be easy. The total weight of the strips in the FRPWWS is estimated to be about 19,440 kg. The pleted FRPWWS was next subject to a factored uniform load of , which is intended to include the selfweight of the roofing material, wind loading and snow loading. Under this loading, the maximum deflection increase is and the total maximum stress in the FRP strips is 1542MPa, which is about % of the design stress. The structure is thus strong enough to resist this loading. 6 CONCLUSIONS The FRP woven web structure (FRPWWS), which represents a new application of FRP in longspan structures, has been presented in this paper. The key aspects of this new system are listed below. I. The FRP woven web, the ring beams and the outofplane tension system are the basic ponents of the FRPWWS. ii. There are five construction steps for a simple FRPWWS as illustrated in Figure 4. iii. The plane weaving patterns can be summarized into three types: tiled patterns, radiated patterns and polygonal patterns. 設計巴巴工作室 iv. Following the same basic principle, many different forms can be constructed. The paper has discussed several such possibilities, including the use of a spatially curved outer ring beam, the doubleweb system and systems with multiple ring beams. v. An FRPWWS experiences three distinct stress states: the initial prestressed state, the outofplane tensioned state and the service loading state, all of which should be considered in design. 7 ACKNOWLEDGEMENTS The authors are grateful to the Natural Science Foundation of China for their support to the research presented here through a national key project on the application of FRP posites in civil engineering in China (Project No. 50238030) and through the Joint Research Fund for Hong Kong and Macao Young Scholars (Project No. 50329802). REFERENCES ANSYS, Inc. 2021. ANSYS User’s Manual. Maeda, K., Ikeda, T., Nakamura, H., Maharishi, S. 2021. Feasibility of ultra longspan suspension bridges made of all plastics. Proceedings of IABSE Symposium (CDROM), Melbourne, Australia, 2021. Pong, ., Cao, J., Chen, J., Due, P., Lustier, ., Liu, L. 2021. Experimental and numerical analysis on normalization of picture frame tests for posite materials. Composites Science and Technology 64 設計巴巴工作室 (1): ., CSU, ., Zhao, C. 1997. Cablesuspended structure design. Beijing: China Building Industry Press. (In Chinese) 大跨度 FRP 網(wǎng)架結構的展望和分析 摘要：本文將會介紹一種新的大跨度結構， FRP 織網(wǎng)結構。在本文中，首先介紹了簡單的 FRPWWS 結構的基本布局和施工步驟，接著闡明了三種基本的織造結構，同時也提出了此類結構方式的幾種變化。由于 FRP 材料的獨特性，為了 FRP 材料的有效使用以及獲得傳統(tǒng)建材所不能及的跨度，有必要研究新型的大跨度結構。在FRPWWS 結構中，高強度 FRP 編制像中國傳統(tǒng)竹席中的竹片一樣被編織成一個平面網(wǎng)狀結構。然后，通過內圈梁的面外移動來拉動 FRP 織網(wǎng)，施加預應 力的過程可以通過預應力筋拉伸或在內圈梁設一定的重力來達成。 本文詳細介紹了一個簡單的 FRPWWS 結構的基本布局和施工步驟。最后描述了有限元法分析一個簡易 FRPWWS 的例子的結論。由中國和瑞士生產的兩類代表產品繁榮性能資料可見表 1。 這些編織條按一定的間距被編排在一個合適形式的平面上。相交如圖 3（ a）所示，三條織帶在一點呈 60176。在后面的例子里，會介紹編織條之間的靜摩擦有助于靜荷載下的剛度而滑動摩擦可消耗動態(tài)荷載下的結構動能。外環(huán)梁通常是鋼筋混凝土的而內環(huán)梁是鋼結構的。由于 FRP 條重量輕厚度小，進行編織時的 過程非常簡單。 4 幾種更為復雜的 FRPWWS 形式 4． 1 基本的扁平織網(wǎng)形式 FRP 網(wǎng)膜是 FRPWWS 結構中最主要的部分。輻射型和多邊形射線的編織形式都由許多重復的編織帶組制成，沒組都由一些線段組成。 4． 2 空間彎曲的外環(huán)梁 在一個實際的結構中，為了制作成空間彎曲的外環(huán)梁及有感染力的空間設計巴巴工作室 結構可能會采納外圈梁的彎曲變形形式。 4． 3 雙重網(wǎng)膜結構 FRPWWS 結構的承載能力主要來源于 FRP 編織條的拉應力產生的幾何剛度。一種替代上述方案的方法是形成兩層網(wǎng)膜，它們的內環(huán)梁或受拉或受壓為編織條提供拉應力。如果要使用更多如圖 11所示的環(huán)梁，一個巨大的網(wǎng)膜將被分割成幾個小跨度的部分，隨著跨度減小，建設和設計難度 會相應減小。 5 一個簡單的 FRPWWS 結構分析 5． 1 單根的 FRP 編織條 如果忽略編織條相互接觸處的作用，每個編織條就主要受拉力作用。編織條經歷三種狀態(tài)：初始施加預應力狀態(tài)，外圈梁的拉力狀態(tài)和使 用荷載時的狀態(tài)。編織條中的 拉力為 1T ，其中水平分量為 1H ,內圈梁位移為 1? 。距節(jié)點距離 x 處的總偏離記為 z（ x），活荷載造成的位移記作 w（ x），內環(huán)梁的總位移記為 2? 。在第一個狀態(tài)中，初始預應力為500Mpa,則 ?? ， mL ? , kNH 840 ? 。 這個簡單的分析中，即可確定一個 FRPWWS 的主要參數(shù)。它具有 150m 的跨度且內環(huán)梁的半徑為 30m。因此，總共是 1080根 FRP 條用于此結構。經有限元法分析，在垂直力為 14400kN 的第二階段下，內圈梁向下位移 ，編織帶的最大應力為 995MPa。 完成后的這個 FRPWWS 結構，由外環(huán)梁圍繞的整個區(qū)域受到一個 mkN 的設計均布荷載，包括屋面均布自重，風載和雪荷載。 6 結論 本文中介紹的 FRP 織網(wǎng)結構（ FRPWWS），其代表了 FRP 在大跨結構中的一個新型應用。 ，可以有很多不同的構造形式。