土楼夯土墙风雨撞击荷载研究

发布时间：2018-01-06 11:42

本文关键词：土楼夯土墙风雨撞击荷载研究　出处：《华侨大学》2013年硕士论文　论文类型：学位论文

【摘要】：福建土楼拥有悠久的历史价值及人文价值，使其成为世界文化遗产。在建筑方面，鉴于其特色的建造工艺及环保理念，使得土楼的研究全面展开。由于福建土楼位于我国东南沿海地区，其特殊的地理位置，使得土楼经常受到台风携带强降雨等极端天气的袭击，台风登陆时，随之而来的暴风雨击打着土楼的夯土墙体，雨滴撞击夯土墙体产生较大的撞击荷载，使得土楼的夯土墙体冲蚀剥落，，减小了墙体有效承载部分，从而降低夯土墙的承载能力和耐久性。作为世界文化遗产，福建土楼的保护势在必行。本文通过理论分析及模型试验相结合的方法，对夯土墙所受风驱雨撞击荷载进行了较系统研究，为福建土楼的风雨侵蚀损伤奠定了良好基础。本文的研究工作主要包括以下几个方面：（1）对土楼夯土墙风驱雨撞击荷载进行理论推导，首先从单雨滴受风驱动撞击土楼夯土墙表面入手，根据一系列的假设推导出单雨滴受风驱动撞击土楼夯土墙表面时的总的撞击荷载及其法向、切向分量，并分析相关的影响因素；再根据降雨的相关特性，推导出土楼夯土墙风驱雨撞击荷载及其法向、切向分荷载，并分析相关影响因素。（2）对土楼夯土墙风驱雨撞击荷载进行试验研究，利用相关的风洞及降雨设备，通过激光位移计测定出特定工况下风雨共同作用对悬臂梁撞击产生的挠度反推出风雨共同作用撞击的正向等效均布荷载，并根据纯风作用下产生的正向等效均布荷载值推导出相应工况下，雨滴撞击模型产生的正向等效均布荷载值，并分析其相关影响因素。（3）根据风洞试验中所测得的雨滴撞击模型时与水平面所成的夹角及雨滴撞击模型产生的正向等效均布荷载值推导出其所具有的总的等效均布荷载值与切向等效均布荷载值，并分析其相关的影响因素。（4）把相同工况下的理论推导结果与试验结果进行对比，分析试验及理论推导结果的可行性。为土楼的保护提供科学依据。
[Abstract]:Fujian Tulou has a long history and cultural value, making it a world cultural heritage. In the construction, in view of its unique construction technology and environmental protection concept. Due to the special location of Fujian earthen tower located in the southeast coastal area of our country, the earth building is often hit by severe rainfall and other extreme weather, when the typhoon makes landfall. The following storm hits the rammed earth wall of the earth building, and raindrops impact the rammed earth wall to produce larger impact load, which makes the rammed earth wall erode and exfoliate, and reduces the effective bearing part of the wall. In order to reduce the bearing capacity and durability of the rammed earth wall. As a world cultural heritage, the protection of the earth building in Fujian is imperative. The wind driven rain impact load on rammed earth wall is studied systematically, which lays a good foundation for the wind and rain erosion damage of the earth building in Fujian Province. The research work of this paper mainly includes the following aspects: 1) theoretical derivation of the wind driving rain impact load on the earth building rammed earth wall, starting with the impact of a single raindrop driven by the wind on the earth building rammed earth wall surface. According to a series of hypotheses, the total impact load and its normal and tangential components when a single raindrop is driven by wind against the surface of a rammed earth wall of a soil building is deduced, and the relevant influencing factors are analyzed. According to the characteristics of rainfall, the impact load and normal and tangential load of rammed earth wall are deduced, and the related factors are analyzed. (2) the impact load of wind driving rain on the rammed earth wall of earth building is studied, and the relevant wind tunnel and rainfall equipment are used. By using the laser displacement meter, the forward equivalent uniform load of the deflection induced by the combined action of wind and rain on the impact of cantilever beam was determined by the laser displacement meter. According to the positive equivalent uniform load produced by the pure wind, the forward equivalent uniform load generated by the raindrop impact model under the corresponding working conditions is deduced, and the relevant influencing factors are analyzed. 3). According to the angle between raindrop impingement model and horizontal plane measured in wind tunnel test and the forward equivalent uniform load value produced by raindrop impact model, the total equivalent uniform load value and tangential equivalent uniform load value are deduced. Load value. The related factors are analyzed. 4) comparing the results of theoretical derivation and test under the same working conditions, analyzing the feasibility of experimental and theoretical derivation, and providing a scientific basis for the protection of earthen buildings.
【学位授予单位】：华侨大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU361;TU312.1

【相似文献】