【正文】 后， FRP 編織成的網(wǎng)膜通過鉸接點(diǎn)與環(huán)行梁連接起來并通過施加一些初始應(yīng)力使其形成一個(gè)扁平的形狀。 3 簡易 FRPWWS 的施工 照圖 4 所介紹的五個(gè)步驟，可以完成一個(gè)最簡易的 FRPWWS 結(jié)構(gòu)。相交如圖 3（ b）所示，還有圖 3（ c）所示的四條織帶的 45176。最簡易的編織方法之一就是一根帶子與經(jīng)過的垂直的其他帶子上下交錯(cuò)，來制造一個(gè)像織物一樣的網(wǎng)面。 編織條材料由于密度小而易被彎曲和盤繞。 2 簡單 FRPWWS 的布局 一個(gè)簡易的 FRP 織網(wǎng)結(jié)構(gòu)包括一張 FRP 編織網(wǎng)、用于錨固的外環(huán)梁和內(nèi)環(huán)梁還有一個(gè)用于張緊的額外重力荷載或一組被施加預(yù)應(yīng)力的筋，如圖一所示。織網(wǎng)的平面被大致的歸為三類。 因此，受拉的 FRP 網(wǎng)形成了一個(gè)帶有兩個(gè)圈梁的大跨屋面，該 FRP 網(wǎng)的集合剛度能抵抗各種荷載。這個(gè)網(wǎng)狀結(jié)構(gòu)的外沿錨固在外圈梁上，結(jié)構(gòu)的中心處還有一個(gè)較小的內(nèi)圈梁用于錨固織帶。 Maeda et al.(2020)就設(shè)想了用 FRP 材料建造跨度 5000 米的懸索橋。文中介紹了一個(gè)簡單的力學(xué)模型用于單個(gè)的 FRP 條力學(xué)變形，也給出了一個(gè)實(shí)例結(jié)構(gòu)的有限元分析的過程。在一個(gè) FRPWWS結(jié)構(gòu)中，高強(qiáng)度的 FRP 材料條像中國竹席中的竹片一樣被編織在一起形成一個(gè)平面網(wǎng)，這個(gè)網(wǎng)狀結(jié)構(gòu)的外圍錨固在一個(gè)圈形的梁上，結(jié)構(gòu)的中心處還有一個(gè)用于錨固織網(wǎng)的內(nèi)圈梁。 and (4) the corrosion resistance of FRP and the ease of installation because of its lightweight translate into low maintenance costs. In this paper, the basic layout and construction procedure for a simple FRPWWS system is presented in detail. The weaving patterns in plane are summarized into three types. Some spatial FRPWWS forms for practical applications are also proposed. A simple mechanical model for individual FRP strips in the web is presented. Results from the finite element analysis of a simple FRPWWS are also described. 2 LAYOUT OF A SIMPLE FRPWWS A simple FRP woven web structure is posed of a FRP woven web, an outer ring beam and an inner ring beam for anchorage, and an additional weight or a set of prestressed tendons, as shown in Figure 1. The web is woven with FRP strips, and CFRP strips or other highperformance hybrid FRP strips are suggested. CFRP strips, which have 中國石油大學(xué)（華東 ） 本科畢業(yè)設(shè)計(jì)（論文） 4 been widely used to strengthen concrete structures in recent years, are manufactured by pultrusion in general, with a fiber volume ratio of about 65%. The properties of two representative products made in China and Switzerland respectively are listed in Table 1. The strips can be curved and circumvoluted due to their small thickness. A typical CFRP strip with properties similar to those shown in Table 1 is able to resist a tensile force of 400kN or more, while the weight of a 300m long strip is less than 70kg. In parison, the self weight of a 300m long high strength steel cable which can resist the same load is more than 500kg. The strips are arranged into a plane surface of a suitable pattern by some predefined rules. In the simplest weaving pattern, each strip passes over one crossing strip and under the next to form a web like a woven fabric. A part of such web is shown in Figure 2 (Pong et al. 2020). In a more general case, the number of strips meeting at a joint and the angles between these strips are the basic parameters of a weaving pattern: two strips at 90176。中國石油大學(xué)（華東 ） 本科畢業(yè)設(shè)計(jì)（論文） 1 Development and analysis of the largespan FRP woven web structure ABSTRACT: An innovative largespan structural system, namely the FRP woven web structure (FRPWWS), is introduced in this paper. In an FRPWWS, the highstrength FRP strips are “woven” like bamboo strips in a Chinese bamboo mat to form a plane web. The outer edge of the web is anchored on an outer ring beam, and an inner ring beam is provided to anchor the FRP strips at the center of the web. The stiffness of the web to resist various loads is derived from the initial prestressing during the “weaving” stage and the additional tensioning as a result of the outofplane movement of the inner ring beam. As a result of the high strengthto weight ratio of FRP, this new structural form offers an attractive option for the construction of spatial structures with spans longer than are possible with conventional structural materials. In this paper, the basic layout and construction procedure for a simple FRPWWS is first presented. Three basic weaving patterns are next explained. Several variations of the basic structural system are also proposed. A simple mechanical model is presented for the deformation of individual FRP strips. Results from a finite element analysis of an example structure are also given. The results of these analyses confirm the feasibility of the FRPWWS. 1 INTRODUCTION FRP is a new kind of structural material, whose use in civil engineering has been actively explored in recent years. Due to its favorable properties like 中國石油大學(xué)（華東 ） 本科畢業(yè)設(shè)計(jì)（論文） 2 corrosion resistance, high strength, low weight, good fatigue performance, and low maintenance cost, it is considered to be an ideal material for constructing longspan structures in the new century. However, its mechanical properties are distinctly different from those of traditional structural materials in some aspects, such as its anisotropy. Due to the unique properties of FRP, it is necessary to explore new forms of largespan structures for its efficient use and for achieving spans larger than are possible with traditional materials. For example, Maeda et al. (2020) have conceived a 5000 meterspan suspension bridge using FRP. The FRP woven web structure, a new largespan structural system, is presented in this paper. This new system represents an attempt aimed at the efficient utilization of the unique characteristics of FRP in a largespan roof. In an FRPWWS, the high strength FRP strips are woven like bamboo strips in a Chines