偏心受拉墙肢的概念（二）.docVIP

偏心受拉墙肢的概念（二） 偏心受拉墙肢的概念（二）提要：如果一个墙肢出现拉力，该墙肢会较早出现裂缝，钢筋较早屈服，地震剪力向未开裂的或未屈服的墙肢转移，使这些墙肢的剪力加大 偏心受拉墙肢的概念（二） 剪力墙结构中，偏心受拉墙肢的概念及如何判断剪力墙属于偏心受拉墙肢？ 抗震墙墙肢为压弯构件，破坏形态有大、小偏压和大、小偏拉；大偏压破坏的墙肢，延性和耗能能力大，优于小偏压破坏；大偏拉破坏的墙肢，延性和耗能能力差，小偏拉破坏墙肢的抗震性能更差。 如果一个墙肢出现拉力，该墙肢会较早出现裂缝，钢筋较早屈服，地震剪力向未开裂的或未屈服的墙肢转移，使这些墙肢的剪力加大，可能引起过早的剪切破坏。部分框支抗震墙结构的落地抗震墙是保证框支层良好抗震性能的关键，因此，2001规范规定，这些墙肢不宜出现偏心受拉（条2款）。89规范无此规定。 双肢墙的一个墙肢为小偏心受拉时，墙肢全截面开裂，刚度降低，另一墙肢的地震水平剪力增大，使之也破坏，双肢墙的抗震性能退化。因此，应避免双肢墙的墙肢出现小偏拉。双肢墙的一个墙肢为大偏拉时，另一受压墙肢的弯矩、剪力设计值应乘以增大系数（条3款），以提高受弯、受剪承载力，推迟其屈服。由于地震为往复作用，因此，两个墙肢的弯矩、剪力设计值都要乘。89规范的规定相同（第条）。 Measures for the routine management of moral education in Middle SchoolsMethod of conventional management of moral education in middle schoolFirst, the guiding ideology:School moral education is an organic whole of the whole education work, always adhere to the school adhere to the moral education, education for this product, and actively promote the quality education, the school building efficient curriculum system of moral education, moral education, improve the sense of attraction and appeal, enhance the moral education work for through and timeliness. Teach everyone, service education and management education, and school moral education work must be with family education and community education closely together, to form a concerted pattern, and strive to create a good atmosphere for education, and to promote the all-round development of students, to establish a scientific moral education full of vigor the For long-term mechanism.Two, the goal of moral education:To guide the students to form the correct world outlook, outlook on life, values, to cultivate students unity and mutual assistance, honest and trustworthy, law-abiding, good quality, hard work, set a good XX students ideological quality, psychological quality and image quality. The formation of excellent moral education curriculum system and management system, the construction of school. The society, family moral education network, to achieve