上海大歌剧院15 m超大悬挑UHPC结构原位试验研究

In-situ Experimental Study on 15 m Super-large Cantilever UHPC Structure of Shanghai Grand Opera House

超高性能混凝土(Ultra-High Performance Concrete,UHPC)是一种抗压强度最高可达200MPa以上且极具应用前景的新型建筑复合材料,目前在房建领域中直接作为主要承重结构建筑材料的应用相对较少。在建的上海大歌剧院前所未有地采用了抗压强度165MPa的UHPC预制构件打造核心区15m超长悬挑梁承重结构,建成后对结构进行原位加载试验,以检测结构性能。该试验首先通过计算分析梁在加载条件下的理论效应,然后通过水箱加载方式在建成的结构上进行原位试验,最终汇总试验数据进行分析并形成结论。试验表明UHPC结构具有较好的性能,可满足背景工程的使用需求,也同时说明其材料性能可用作超大悬挑等特殊结构形式的解决方案。

Ultra-High Performance Concrete(UHPC)is a novel building composite material with compressive strength exceeding 200 MPa and significant application potential.Its direct application as a primary load-bearing structural material in building construction remains relatively rare.The Shanghai Grand Opera House,currently under construction,unprecedentedly employs UHPC precast components with a compressive strength of 165 MPa to construct a 15 m ultra-long cantilever beam in its core area.Upon completion,an in-situ loading test is conducted on the structure to assess its performance.Theoretical effects of the beam under loading conditions are first calculated and analyzed,followed by an in-situ test using a water tank loading method.Test data are subsequently summarized and analyzed to derive conclusions.The results indicate that the UHPC structure exhibits excellent performance,satisfying the requirements of the engineering project and demonstrating that its material properties are suitable for special structural solutions such as super-large cantilevers.