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门式刚架系梁柱合一跨变结构,其造型美观,结构轻巧,构造简单。实践证明,在软土地基上大面积载荷工程中应用是较理想的结构形式。其特点如下: 1.结构本身刚度大,有独立平衡外力作用。因为门架结构基础呈铰接状态,故而对地基依赖性小,基础角变位不影响结构受力状态,对地坪大面积载荷具有一定的适应性。2.抗震性能好。一般刚架结构震害大都位于梁柱节点处及柱子下部地面以上部位。门架结构由于梁柱刚接其横向刚度很大,经地震力冲击即使个别部位开裂,但由于钢筋拉接尚不致倒塌;如果屋面板采用三
The portal type rigid frame is a cross-varying structure of beams and columns, which is beautiful in appearance, light in structure, and simple in structure. Practice has proved that the application of large-area load engineering on soft ground is an ideal structural form. Its characteristics are as follows: 1. The structure itself is very rigid and has an independent balance of external force. Because the basic structure of the gantry is articulated, it is less dependent on the foundation. The angling of the foundation angle does not affect the structural stress state, and it has certain adaptability to the large-area load of the floor. 2. The seismic performance is good. Generally, the earthquake damage of the rigid frame structure is mostly located at the beam-column joint and above the lower part of the column. Due to the large rigidity of the gantry structure just after the beam and column are connected, even though some parts of the gantry are cracked by seismic force, the pull joint of the steel bar is not yet collapsed; if the roof plate adopts three