With the deepening of urbanization in China,the construction demand for large-scale transportation buildings is increasing.Because of its limited façade and huge plan,it mainly relies on the skylight to achieve natural lighting in the large depth plane.Due to the simplification of structure,the difference in sunlight conditions is often ignored,and the distribution form of a similar row of multi-row strip flat skylights is copied,and the setting of various shading measures is ignored,which is often prone to uneven overall lighting due to insufficient local lighting or glare.As a typical representative of the large difference in sun height angle between winter and summer,the optimal demand for skylight lighting in the two seasons is often hindered by each other,and the comprehensive control of lighting and shading of large-scale traffic buildings in this area is more complicated,and it also has higher requirements for its bar skylight and shading design.In view of the above key scientific problems,this study selects a typical case of a large railway passenger station in Hangzhou to carry out physical measurement of daylighting,summarizes the actual lighting problems of such buildings under the distribution of strip skylights in this climate zone,and completes the annual dynamic light environment simulation through the Ladybug + Honeybee tool of Rhino platform based on the typical model of large transportation buildings,focusing on the key variables of skylights and shading forms.The results show that large railway passenger stations in hot summer and cold winter are still prone to insufficient local illumination and low overall lighting uniformity under the lighting of common strip skylights,and the area directly under the central skylight of the waiting hall often has a greater risk of glare due to excessive direct light,and its illumination is much greater than that under the periphery of the skylight that still has the risk of insufficient lighting.In order to improve this phenomenon,the width of the skylight should be guaranteed to be moderately high within the moderate window-to-floor ratio,and the length and number of moderately large skylights should be matched,and all smaller skylight widths,lengths and numbers should be avoided as much as possible.The introduction of sunshades outside the skylight has a certain effect on improving the excessive direct light and uneven lighting.The window floor is relatively small,and a larger horizontal visor height,moderate vertical visor angle(due south)and a small number of vertical visors can be adopted;When the skylight is relatively large,it can match the smaller horizontal shading height,moderate vertical visor angle and more vertical visors to ensure that the lighting intensity is maximized without reducing the uniformity of lighting,so as to achieve the overall balanced light environment performance.This study can provide an effective scientific basis for the optimal design decision of the suitability of strip skylights of large transportation buildings in hot summer and cold winter.
hot summer and cold wintertransportation buildingsstrip skylighttop shadingdaylighting
NETL
NSTL
万方数据
