【单选题】![](https://cos-cdn.shuashuati.com/shuashuati-web/2024-0521-0905-00/logo-new-ad743.png)
假定该梁两端支座均改为固定支座,且gk=pk=0(忽略梁自重),gk=pk=58kN,集中荷载作用点分别有同方向的集中扭矩作用,其设计值均为12kN•m;as=65mm。已知腹板、翼缘的矩形截面受扭塑性抵抗矩分别为wtw=16.15×106mm3,wty=3.6×106mm3。试问,集中荷载作用下该剪扭构件混凝土受扭承载力降低系数B,与下列( )项数值最为接近。
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAA5ElEQVRYR2NkGGDAOMD2M+B0wKpVq9huv/jbxPD/fxwDA4MkhQ59zsDIuEhVgrkuLCzsF7JZOB3QOml5B8P//+UUWoyqnZGxszovsoI4B0xc9gyfzxmZmb2rcsK3IRvWMWm599///7fgcfTz6vwoKWId8B+f75kZGX0q8iK3kugAhur8KJRQxx0FE5fhdQC5UTPqgNEQGA2B0RAYDYHREBgNgaETAuTW96TqG7yt4tbRFhGRIQBqHTP9+8dIoDUMTxqk5AK8zXKYiaDWMYhNpANIaJYPdMdkwLtmpOZnctUPeDkAAP6tmiH1ggTLAAAAAElFTkSuQmCC)
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参考答案:
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参考解析:
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