钢筋混凝土框架结构抗震内力调整系数分析-船舶与海洋工程专业论文.docxVIP

ABSTRACT With the continuous development of Chinas construction industry, the designers put forward higher requirements of the multi-story frame building structure. Frame structure is a common structure form of reinforced concrete building, with good benefits of clear power transmission, structural layout flexibility, shock resistance and integrity, has been widely used in various industrial and civil buildings. Most modern frame structure take strong column-weak beam frame structure yielding mechanism to ensure a good seismic performance. However, after the earthquake in Wenchuan, scholars have found that most of frame structure failed to achieve strong column weak beam requirement in the earthquake zone. To solve this problem, this paper combines several representative abroad specification and documentation of the relevant provisions to analyze the column moment amplification coefficient of the Design of Concrete Structures (GB50010-2010), and to determine the value of adjustment coefficient with several numerical examples. In order to achieve strong column-weak beam and postpone frame columns occurrence of plastic hinges, Chinese norms improve the column end moments which are obtained by elastic analysis and portfolio, namely, make the column end moment multiply a column - beam moment differential coefficient which is greater than one beam end moment. Since the operating is difficult, designers make column calculated moment multiply the column - beam moment differential coefficient directly to get the column design moment. In this paper, as the new specification substantial increase the column - beam moment differential coefficient (from 1.2 to 1.5 in second seismic), which leads to a substantial increase in column moment without increasingthe column axial force, causing not comply with the laws of mechanics phenomenon, we propose a amendment practice that uses frame column axial force and bending moment simultaneous amplification method, which is required by con