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玻璃为脆性材料,其侧面许用应力小于大面许用应力,约为大面许用应力的70%。大尺寸全玻璃幕墙通常采用吊挂玻璃结构,避免下端支承玻璃幕墙的侧面挤压受力方式,而是通过玻璃上方的吊夹构件对其的挤压夹紧,将玻璃吊挂在主体结构上,玻璃的下方悬空不承受挤压,玻璃承受吊夹的挤压力和重力;因承受风压,玻璃需作四边支撑处理,受力都是通过其大面接触面承受大面挤压力。但是当玻璃幕墙上方结构受限无法采用吊挂结构,以及当尺寸大到需要两块玻璃拼接而下方玻璃不宜采用吊挂结构,下端吊挂(反吊挂)玻璃结构就是最佳选择之一。因其强度、刚度计算与其他结构的相同,只分析下端吊挂玻璃结构在重力作用下的强度计算,举例分析说明下端吊挂玻璃结构的应用可靠易行。
Glass is a brittle material, the permissible lateral stress is less than the allowable stress of the large surface, about 70% of the allowable stress of the large surface. Large-size glass curtain wall is usually suspended glass structure, to avoid the bottom side of the glass curtain wall to support the force of compression, but through the top of the glass hanging clamp member of its extrusion clamping, the glass hanging on the main structure , The glass does not withstand the pressure of the dangling under the suspension, glass to withstand the squeeze pressure and gravity hanging folder; due to withstand wind pressure, the glass needs to be supported on four sides, the force is through its large contact surface to withstand large surface extrusion pressure. However, when the structure above the glass curtain wall is limited, the hanging structure can not be adopted, and when the size is large enough to require two glass splicing while the glass below should not be used with the hanging structure, the glass structure with the lower hanging (anti-hanging) is one of the best choices. Due to its strength and stiffness calculation are the same as those of other structures, only the strength calculation of the suspended glass under the gravity under the action of gravity is analyzed. The example analysis shows that the application of the suspended glass underneath is reliable and easy to implement.